testsuite: Prepare for -std=gnu23 default

Now that C23 support is essentially feature-complete, I'd like to switch the default language version for C compilation to -std=gnu23. This requires updating a large number of testcases that fail with the new language version if left unchanged. In this patch, update most of the tests for which there is a safe change that works both before and after the update to default language version - typically adding the option -std=gnu17 or -Wno-old-style-definition to the tests. (There are also a few tests where I'd like to investigate further why they fail with -std=gnu23, or where I think such failures show an actual bug to fix before changing the default language version, or where it seems more appropriate to make a testcase change that would result in failures in the absence of the language version change rather than just adding an option that does nothing with the gnu17 default.) The libffi test fixes have also been submitted upstream: <https://github.com/libffi/libffi/pull/861>. Most of the failures requiring such changes are for one of two reasons: * Unprototyped function declarations with () (meaning the same as (void) in C23 mode) for a function then called with arguments. * Old-style function definitions, which warn by default in C23 mode, so resulting in test failures for the unexpected warnings. Other reasons for failures include: * Tests with their own definitions of bool, true and false. * Tests of diagnostics (often with -pedantic) in cases where C23 has changed semantics, such as: - tag compatibility for structs; - enum values out of range of int; - handing of qualified array types; - decimal floating types formerly needing -pedantic diagnostics, but being standard in C23. Bootstrapped with no regressions for x86_64-pc-linux-gnu. gcc/testsuite/ * c-c++-common/Wcast-function-type.c: Add -std=gnu17 for C. * c-c++-common/Wformat-pr84258.c: Add -std=gnu17 for C. * c-c++-common/Wvarargs.c: Add -std=gnu17 for C. * c-c++-common/analyzer/data-model-12.c: Add -std=gnu17 for C. * c-c++-common/builtins.c: Add -std=gnu17 for C. * c-c++-common/pointer-to-fn1.c: Add -std=gnu17 for C. * c-c++-common/pragma-diag-17.c: Add -std=gnu17 for C. * c-c++-common/sizeof-array-argument.c: Add -Wno-old-style-definition for C. * g++.dg/lto/pr54625-1_0.c: Add -std=gnu17. * g++.dg/lto/pr54625-2_0.c: Add -std=gnu17. * gcc.c-torture/compile/20040214-2.c: Add -std=gnu17. * gcc.c-torture/compile/921011-2.c: Add -std=gnu17. * gcc.c-torture/compile/931102-1.c: Add -std=gnu17. * gcc.c-torture/compile/990801-1.c: Add -std=gnu17. * gcc.c-torture/compile/nested-1.c: Add -std=gnu17. * gcc.c-torture/compile/pr100241-1.c: Add -std=gnu17. * gcc.c-torture/compile/pr106101.c: Add -std=gnu17. * gcc.c-torture/compile/pr113616.c: Add -std=gnu17. * gcc.c-torture/compile/pr47967.c: Add -std=gnu17. * gcc.c-torture/compile/pr51694.c: Add -std=gnu17. * gcc.c-torture/compile/pr71109.c: Add -std=gnu17. * gcc.c-torture/compile/pr83051-2.c: Add -std=gnu17. * gcc.c-torture/compile/pr89663-1.c: Add -std=gnu17. * gcc.c-torture/compile/pr94238.c: Add -std=gnu17. * gcc.c-torture/compile/pr96796.c: Add -std=gnu17. * gcc.c-torture/compile/pr97576.c: Add -std=gnu17. * gcc.c-torture/compile/udivmod4.c: Add -std=gnu17. * gcc.c-torture/execute/20010605-2.c: Add -std=gnu17. * gcc.c-torture/execute/20020404-1.c: Add -std=gnu17. * gcc.c-torture/execute/20030714-1.c: Add -std=gnu17. * gcc.c-torture/execute/20051012-1.c: Add -std=gnu17. * gcc.c-torture/execute/20190820-1.c: Add -std=gnu17. * gcc.c-torture/execute/920612-1.c: Add -Wno-old-style-definition. * gcc.c-torture/execute/930608-1.c: Add -std=gnu17. * gcc.c-torture/execute/comp-goto-1.c: Add -std=gnu17. * gcc.c-torture/execute/ieee/fp-cmp-1.x: Add -std=gnu17. * gcc.c-torture/execute/ieee/fp-cmp-2.x: Add -std=gnu17. * gcc.c-torture/execute/ieee/fp-cmp-3.x: Add -std=gnu17. * gcc.c-torture/execute/ieee/fp-cmp-4.x: New file. * gcc.c-torture/execute/ieee/fp-cmp-4f.x: New file. * gcc.c-torture/execute/ieee/fp-cmp-4l.x: New file. * gcc.c-torture/execute/loop-9.c: Add -std=gnu17. * gcc.c-torture/execute/pr103209.c: Add -std=gnu17. * gcc.c-torture/execute/pr28289.c: Add -std=gnu17. * gcc.c-torture/execute/pr34982.c: Add -std=gnu17. * gcc.c-torture/execute/pr67037.c: Add -std=gnu17. * gcc.c-torture/execute/va-arg-2.c: Add -std=gnu17. * gcc.dg/20010202-1.c: Add -std=gnu17. * gcc.dg/20020430-1.c: Add -std=gnu17. * gcc.dg/20031218-3.c: Add -std=gnu17. * gcc.dg/20040127-1.c: Add -std=gnu17. * gcc.dg/20041014-1.c: Add -Wno-old-style-definition. * gcc.dg/20041122-1.c: Add -std=gnu17. * gcc.dg/20050309-1.c: Add -std=gnu17. * gcc.dg/20061026.c: Add -std=gnu17. * gcc.dg/20101010-1.c: Add -std=gnu17. * gcc.dg/Warray-parameter-10.c: Add -std=gnu17. * gcc.dg/Wbuiltin-declaration-mismatch-2.c: Add -std=gnu17. * gcc.dg/Wbuiltin-declaration-mismatch-3.c: Add -std=gnu17. * gcc.dg/Wbuiltin-declaration-mismatch-4.c: Add -std=gnu17. * gcc.dg/Wbuiltin-declaration-mismatch-5.c: Add -std=gnu17. * gcc.dg/Wbuiltin-declaration-mismatch.c: Add -std=gnu17. * gcc.dg/Wcxx-compat-2.c: Add -std=gnu17. * gcc.dg/Wdouble-promotion.c: Add -std=gnu17. * gcc.dg/Wfree-nonheap-object-7.c: Add -std=gnu17. * gcc.dg/Wimplicit-int-1.c: Add -std=gnu17. * gcc.dg/Wimplicit-int-1a.c: Add -std=gnu17. * gcc.dg/Wimplicit-int-2.c: Add -std=gnu17. * gcc.dg/Wimplicit-int-3.c: Add -std=gnu17. * gcc.dg/Wimplicit-int-4.c: Add -std=gnu17. * gcc.dg/Wimplicit-int-4a.c: Add -std=gnu17. * gcc.dg/Wincompatible-pointer-types-1.c: Add -std=gnu17. * gcc.dg/Wrestrict-19.c: Add -std=gnu17. * gcc.dg/Wrestrict-4.c: Add -std=gnu17. * gcc.dg/Wrestrict-5.c: Add -std=gnu17. * gcc.dg/Wstrict-overflow-20.c: Add -std=gnu17. * gcc.dg/Wstringop-overflow-13.c: Add -std=gnu17. * gcc.dg/analyzer/doom-d_main-IdentifyVersion.c: Add -std=gnu17. * gcc.dg/analyzer/doom-s_sound-pr108867.c: Add -std=gnu17. * gcc.dg/analyzer/pr93032-mztools-signed-char.c: Add -Wno-old-style-definition. * gcc.dg/analyzer/pr93032-mztools-unsigned-char.c: Add -Wno-old-style-definition. * gcc.dg/analyzer/pr93355-localealias.c: Add -Wno-old-style-definition. * gcc.dg/analyzer/pr93375.c: Add -std=gnu17. * gcc.dg/analyzer/pr94688.c: Add -std=gnu17. * gcc.dg/analyzer/sensitive-1.c: Add -std=gnu17. * gcc.dg/analyzer/torture/asm-x86-linux-wfx_get_ps_timeout-full.c: Add -std=gnu17. * gcc.dg/analyzer/torture/pr104863.c: Add -std=gnu17. * gcc.dg/analyzer/torture/pr93379.c: Add -std=gnu17. * gcc.dg/array-quals-2.c: Add -std=gnu17. * gcc.dg/attr-invalid.c: Add -Wno-old-style-definition. * gcc.dg/auto-init-uninit-A.c: Add -Wno-old-style-definition. * gcc.dg/builtin-choose-expr.c: Declare exit with (int) prototype. * gcc.dg/builtin-tgmath-err-1.c: Add -std=gnu17. * gcc.dg/builtins-30.c: Add -std=gnu17. * gcc.dg/cast-function-1.c: Add -std=gnu17. * gcc.dg/cleanup-1.c: Add -std=gnu17. * gcc.dg/compat/struct-complex-1_x.c: Add -std=gnu17. * gcc.dg/compat/struct-complex-2_x.c: Add -std=gnu17. * gcc.dg/compat/union-m128-1_x.c: Add -std=gnu17. * gcc.dg/debug/dwarf2/pr66482.c: Add -std=gnu17. * gcc.dg/dfp/composite-type-2.c: Add -std=gnu17. * gcc.dg/dfp/composite-type.c: Add -std=gnu17. * gcc.dg/dfp/keywords-pedantic.c: Add -std=gnu17. * gcc.dg/dremf-type-compat-1.c: Add -std=gnu17. * gcc.dg/dremf-type-compat-2.c: Add -std=gnu17. * gcc.dg/dremf-type-compat-3.c: Add -std=gnu17. * gcc.dg/dremf-type-compat-4.c: Add -std=gnu17. * gcc.dg/enum-compat-1.c: Add -std=gnu17. * gcc.dg/enum-compat-2.c: Add -std=gnu17. * gcc.dg/floatn-errs.c: Add -std=gnu17. * gcc.dg/fltconst-pedantic-dfp.c: Add -std=gnu17. * gcc.dg/format/proto.c: Add -std=gnu17. * gcc.dg/format/sentinel-1.c: Add -std=gnu17. * gcc.dg/gomp/declare-simd-1.c: Add -Wno-old-style-definition. * gcc.dg/ifelse-1.c: Add -Wno-old-style-definition. * gcc.dg/inline-33.c: Add -std=gnu17. * gcc.dg/ipa/inline-5.c: Add -std=gnu17. * gcc.dg/ipa/ipa-sra-21.c: Add -std=gnu17. * gcc.dg/ipa/pr102714.c: Add -std=gnu17. * gcc.dg/ipa/pr104813.c: Add -std=gnu17. * gcc.dg/ipa/pr108679.c: Add -std=gnu17. * gcc.dg/ipa/pr42706.c: Add -std=gnu17. * gcc.dg/ipa/pr88214.c: Add -Wno-old-style-definition. * gcc.dg/ipa/pr91853.c: Add -Wno-old-style-definition. * gcc.dg/ipa/pr93763.c: Add -std=gnu17. * gcc.dg/ipa/pr96482-2.c: Add -std=gnu17. * gcc.dg/lto/20091013-1_2.c: Add -std=gnu17. * gcc.dg/lto/20091015-1_2.c: Add -std=gnu17. * gcc.dg/lto/pr113197_1.c: Add -std=gnu17. * gcc.dg/lto/pr54702_1.c: Add -std=gnu17. * gcc.dg/lto/pr99849_0.c: Add -std=gnu17. * gcc.dg/noncompile/920923-1.c: Add -std=gnu17. * gcc.dg/noncompile/old-style-parm-1.c: Add -Wno-old-style-definition. * gcc.dg/noncompile/old-style-parm-3.c: Add -Wno-old-style-definition. * gcc.dg/noncompile/pr30552-2.c: Add -Wno-old-style-definition. * gcc.dg/noncompile/pr30552-3.c: Add -std=gnu17. * gcc.dg/noncompile/pr71265.c: Add -Wno-old-style-definition. * gcc.dg/noncompile/pr79758-2.c: Add -Wno-old-style-definition. * gcc.dg/noncompile/pr79758.c: Add -Wno-old-style-definition. * gcc.dg/noncompile/va-arg-1.c: Add -std=gnu17. * gcc.dg/old-style-prom-1.c: Add -std=gnu17. * gcc.dg/old-style-prom-2.c: Add -std=gnu17. * gcc.dg/old-style-prom-3.c: Add -std=gnu17. * gcc.dg/old-style-then-proto-1.c: Add -std=gnu17. * gcc.dg/parm-incomplete-1.c: Add -std=gnu17. * gcc.dg/parm-mismatch-1.c: Add -std=gnu17. * gcc.dg/permerror-default.c: Add -std=gnu17. * gcc.dg/permerror-fpermissive-nowarning.c: Add -std=gnu17. * gcc.dg/permerror-fpermissive.c: Add -std=gnu17. * gcc.dg/permerror-noerror.c: Add -std=gnu17. * gcc.dg/permerror-nowarning.c: Add -std=gnu17. * gcc.dg/permerror-pedantic.c: Add -std=gnu17. * gcc.dg/plugin/infoleak-net-ethtool-ioctl.c: Add -std=gnu17. * gcc.dg/pointer-array-quals-1.c: Add -std=gnu17. * gcc.dg/pointer-array-quals-2.c: Add -std=gnu17. * gcc.dg/pr100791.c: Add -std=gnu17. * gcc.dg/pr100843.c: Add -std=gnu17. * gcc.dg/pr102273.c: Add -std=gnu17. * gcc.dg/pr102385.c: Add -std=gnu17. * gcc.dg/pr103222.c: Add -std=gnu17. * gcc.dg/pr105140.c: Add -std=gnu17. * gcc.dg/pr105150.c: Add -std=gnu17. * gcc.dg/pr105250.c: Add -std=gnu17. * gcc.dg/pr105972.c: Add -Wno-old-style-definition. * gcc.dg/pr111039.c: Add -std=gnu17. * gcc.dg/pr111407.c: Add -std=gnu17. * gcc.dg/pr111922.c: Add -Wno-old-style-definition. * gcc.dg/pr15236.c: Add -std=gnu17. * gcc.dg/pr17188-1.c: Add -std=gnu17. * gcc.dg/pr20368-1.c: Add -std=gnu17. * gcc.dg/pr20368-2.c: Add -std=gnu17. * gcc.dg/pr20368-3.c: Add -std=gnu17. * gcc.dg/pr27331.c: Add -Wno-old-style-definition. * gcc.dg/pr27861-1.c: Add -std=gnu17. * gcc.dg/pr28121.c: Add -std=gnu17. * gcc.dg/pr28243.c: Add -std=gnu17. * gcc.dg/pr28888.c: Add -std=gnu17. * gcc.dg/pr29254.c: Add -std=gnu17. * gcc.dg/pr34457-1.c: Add -std=gnu17. * gcc.dg/pr36015.c: Add -std=gnu17. * gcc.dg/pr38245-3.c: Add -std=gnu17. * gcc.dg/pr38245-4.c: Add -std=gnu17. * gcc.dg/pr41241.c: Add -std=gnu17. * gcc.dg/pr43058.c: Add -std=gnu17. * gcc.dg/pr44539.c: Add -std=gnu17. * gcc.dg/pr45055.c: Add -std=gnu17. * gcc.dg/pr50908.c: Add -Wno-old-style-definition. * gcc.dg/pr60647-1.c: Add -Wno-old-style-definition. * gcc.dg/pr63762.c: Add -std=gnu17. * gcc.dg/pr63804.c: Add -std=gnu17. * gcc.dg/pr68306-3.c: Add -std=gnu17. * gcc.dg/pr68533.c: Add -std=gnu17. * gcc.dg/pr69156.c: Add -std=gnu17. * gcc.dg/pr7356-2.c: Add -Wno-old-style-definition. * gcc.dg/pr79983.c: Add -std=gnu17. * gcc.dg/pr83463.c: Add -std=gnu17. * gcc.dg/pr87347.c: Add -std=gnu17. * gcc.dg/pr89521-1.c: Add -std=gnu17. * gcc.dg/pr89521-2.c: Add -std=gnu17. * gcc.dg/pr90648.c: Add -std=gnu17. * gcc.dg/pr93573-1.c: Add -std=gnu17. * gcc.dg/pr94167.c: Add -std=gnu17. * gcc.dg/pr94705.c: Add -std=gnu17. * gcc.dg/pr95118.c: Add -std=gnu17. * gcc.dg/pr96335.c: Add -std=gnu17. * gcc.dg/pr97830.c: Add -std=gnu17. * gcc.dg/pr97882.c: Add -std=gnu17. * gcc.dg/pr99122-2.c: Add -std=gnu17. * gcc.dg/pr99122-3.c: Add -std=gnu17. * gcc.dg/qual-component-1.c: Add -std=gnu17. * gcc.dg/sibcall-6.c: Add -Wno-old-style-definition. * gcc.dg/sms-2.c: Add -Wno-old-style-definition. * gcc.dg/tm/20091221.c: Add -std=gnu17. * gcc.dg/torture/bfloat16-basic.c: Add -Wno-old-style-definition. * gcc.dg/torture/float128-basic.c: Add -Wno-old-style-definition. * gcc.dg/torture/float128x-basic.c: Add -Wno-old-style-definition. * gcc.dg/torture/float16-basic.c: Add -Wno-old-style-definition. * gcc.dg/torture/float32-basic.c: Add -Wno-old-style-definition. * gcc.dg/torture/float32x-basic.c: Add -Wno-old-style-definition. * gcc.dg/torture/float64-basic.c: Add -Wno-old-style-definition. * gcc.dg/torture/float64x-basic.c: Add -Wno-old-style-definition. * gcc.dg/torture/pr102762.c: Add -std=gnu17. * gcc.dg/torture/pr103987.c: Add -std=gnu17. * gcc.dg/torture/pr104825.c: Add -Wno-old-style-definition. * gcc.dg/torture/pr105166.c: Add -std=gnu17. * gcc.dg/torture/pr105185.c: Add -Wno-old-style-definition. * gcc.dg/torture/pr109652.c: Add -std=gnu17. * gcc.dg/torture/pr112444.c: Add -std=gnu17. * gcc.dg/torture/pr113895-3.c: Add -std=gnu17. * gcc.dg/torture/pr24626-2.c: Add -std=gnu17. * gcc.dg/torture/pr25183.c: Add -std=gnu17. * gcc.dg/torture/pr38948.c: Add -std=gnu17. * gcc.dg/torture/pr44807.c: Add -std=gnu17. * gcc.dg/torture/pr47281.c: Add -std=gnu17. * gcc.dg/torture/pr47958-1.c: Add -Wno-old-style-definition. * gcc.dg/torture/pr48063.c: Add -std=gnu17. * gcc.dg/torture/pr57036-1.c: Add -std=gnu17. * gcc.dg/torture/pr57330.c: Add -std=gnu17. * gcc.dg/torture/pr57584.c: Add -std=gnu17. * gcc.dg/torture/pr67741.c: Add -std=gnu17. * gcc.dg/torture/pr68104.c: Add -std=gnu17. * gcc.dg/torture/pr69242.c: Add -std=gnu17. * gcc.dg/torture/pr70457.c: Add -std=gnu17. * gcc.dg/torture/pr70985.c: Add -std=gnu17. * gcc.dg/torture/pr71606.c: Add -std=gnu17. * gcc.dg/torture/pr71816.c: Add 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gcc.dg/tree-ssa/20030711-1.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/20030711-2.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/20030711-3.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/20030714-1.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/20030714-2.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/20030728-1.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/20030807-10.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/20030807-11.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/20030807-3.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/20030807-6.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/20030807-7.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/20030814-4.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/20030814-5.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/20030814-6.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/20030918-1.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/20040514-2.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/loadpre7.c: Add -Wno-old-style-definition. * gcc.dg/tree-ssa/pr111003.c: Add -std=gnu17. * gcc.dg/tree-ssa/pr115128.c: Add -std=gnu17. * gcc.dg/tree-ssa/pr115191.c: Add -std=gnu17. * gcc.dg/tree-ssa/pr24840.c: Add -std=gnu17. * gcc.dg/tree-ssa/pr69666.c: Add -std=gnu17. * gcc.dg/tree-ssa/pr70232.c: Add -std=gnu17. * gcc.dg/ubsan/pr79757-1.c: Add -Wno-old-style-definition. * gcc.dg/ubsan/pr79757-2.c: Add -Wno-old-style-definition. * gcc.dg/ubsan/pr79757-3.c: Add -Wno-old-style-definition. * gcc.dg/ubsan/pr81223.c: Add -std=gnu17. * gcc.dg/uninit-10-O0.c: Add -Wno-old-style-definition. * gcc.dg/uninit-10.c: Add -Wno-old-style-definition. * gcc.dg/uninit-32.c: Add -std=gnu17. * gcc.dg/uninit-41.c: Add -std=gnu17. * gcc.dg/uninit-A-O0.c: Add -Wno-old-style-definition. * gcc.dg/uninit-A.c: Add -Wno-old-style-definition. * gcc.dg/unused-1.c: Add -Wno-old-style-definition. * gcc.dg/vect/bb-slp-pr114249.c: Add -std=gnu17. * gcc.dg/vect/bb-slp-pr97486.c: Add -std=gnu17. * gcc.dg/vect/bb-slp-subgroups-1.c: Add -std=gnu17. * gcc.dg/vect/bb-slp-subgroups-2.c: Add -std=gnu17. * gcc.dg/vect/bb-slp-subgroups-3.c: Add -std=gnu17. * gcc.dg/vect/vect-early-break_111-pr113731.c: Add -std=gnu17. * gcc.dg/vect/vect-early-break_122-pr114239.c: Add -std=gnu17. * gcc.dg/vect/vect-multi-peel-gaps.c: Add -std=gnu17. * gcc.dg/vla-stexp-2.c: Add -std=gnu17. * gcc.dg/warn-1.c: Add -Wno-old-style-definition. * gcc.dg/winline-10.c: Add -Wno-old-style-definition. * gcc.dg/wtr-label-1.c: Add -Wno-old-style-definition. * gcc.dg/wtr-switch-1.c: Add -Wno-old-style-definition. * gcc.target/i386/excess-precision-3.c: Add -Wno-old-style-definition. * gcc.target/i386/fma4-256-nmsubXX.c: Add -std=gnu17. * gcc.target/i386/fma4-nmsubXX.c: Add -std=gnu17. * gcc.target/i386/nop-mcount.c: Add -Wno-old-style-definition. * gcc.target/i386/pr102627.c: Add -std=gnu17. * gcc.target/i386/pr106994.c: Add -std=gnu17. * gcc.target/i386/pr68349.c: Add -std=gnu17. * gcc.target/i386/pr97313.c: Add -std=gnu17. * gcc.target/i386/pr99454.c: Add -std=gnu17. * gcc.target/i386/record-mcount.c: Add -Wno-old-style-definition. libffi/ * testsuite/libffi.call/va_struct2.c (test_fn): Cast n to void. * testsuite/libffi.call/va_struct3.c (test_fn): Likewise. Backported from <https://github.com/libffi/libffi/pull/861>.
author: Joseph Myers <josmyers@redhat.com> 2024-10-16 16:46:49 +0000
committer: Joseph Myers <josmyers@redhat.com> 2024-10-16 16:48:24 +0000
commit: 9fb5348e3021021e82d75e4ca4e6f8d51a34c24f (patch)
tree: d0dd6f1084e834ab9797f5846564f7bcc7bf3bcc /gcc
parent: 6756250fcbed4a214c30de94e4ec68ea130528d5 (diff)
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322 files changed, 343 insertions, 240 deletions
diff --git a/gcc/testsuite/c-c++-common/Wcast-function-type.c b/gcc/testsuite/c-c++-common/Wcast-function-type.c
index b49da48..8f2997d 100644
--- a/gcc/testsuite/c-c++-common/Wcast-function-type.c
+++ b/gcc/testsuite/c-c++-common/Wcast-function-type.c
@@ -1,5 +1,6 @@
 /* { dg-do compile } */
 /* { dg-options "-Wcast-function-type" } */
+/* { dg-additional-options "-std=gnu17" { target c } } */
 
 int f(long);
 
diff --git a/gcc/testsuite/c-c++-common/Wformat-pr84258.c b/gcc/testsuite/c-c++-common/Wformat-pr84258.c
index d2870a8..10fa9ba 100644
--- a/gcc/testsuite/c-c++-common/Wformat-pr84258.c
+++ b/gcc/testsuite/c-c++-common/Wformat-pr84258.c
@@ -1,4 +1,5 @@
 /* { dg-options "-Wformat" } */
+/* { dg-additional-options "-std=gnu17" { target c } } */
 
 int main (int argc, char **argv)
 {
diff --git a/gcc/testsuite/c-c++-common/Wvarargs.c b/gcc/testsuite/c-c++-common/Wvarargs.c
index bfd8276..ea86ba3 100644
--- a/gcc/testsuite/c-c++-common/Wvarargs.c
+++ b/gcc/testsuite/c-c++-common/Wvarargs.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" { target c } } */
 
 #include <stdarg.h>
 
diff --git a/gcc/testsuite/c-c++-common/analyzer/data-model-12.c b/gcc/testsuite/c-c++-common/analyzer/data-model-12.c
index 653b7ad..e4a7fbd 100644
--- a/gcc/testsuite/c-c++-common/analyzer/data-model-12.c
+++ b/gcc/testsuite/c-c++-common/analyzer/data-model-12.c
@@ -1,4 +1,5 @@
 /* Mismatching decl of foo.  */
+/* { dg-additional-options "-std=gnu17" { target c } } */
 
 int foo ();
 
diff --git a/gcc/testsuite/c-c++-common/builtins.c b/gcc/testsuite/c-c++-common/builtins.c
index 527c77e..f44d0d3 100644
--- a/gcc/testsuite/c-c++-common/builtins.c
+++ b/gcc/testsuite/c-c++-common/builtins.c
@@ -2,7 +2,7 @@
    with no prototype do not cause an ICE.
   { dg-do compile }
   { dg-options "-O2 -Wall -Wextra" }
-  { dg-additional-options "-fpermissive" { target c } }
+  { dg-additional-options "-std=gnu17 -fpermissive" { target c } }
   { dg-prune-output "warning" }
   { dg-require-effective-target alloca }  */
 
diff --git a/gcc/testsuite/c-c++-common/pointer-to-fn1.c b/gcc/testsuite/c-c++-common/pointer-to-fn1.c
index 70a5831..862ca7a 100644
--- a/gcc/testsuite/c-c++-common/pointer-to-fn1.c
+++ b/gcc/testsuite/c-c++-common/pointer-to-fn1.c
@@ -1,6 +1,7 @@
 /* PR c++/106937 */
 /* { dg-do compile { target i?86-*-* x86_64-*-* } } */
 /* { dg-options "-fpermissive -fcf-protection" } */
+/* { dg-additional-options "-std=gnu17" { target c } } */
 /* { dg-additional-options "-std=c++11" { target c++ } } */
 /* Test printing a pointer to function with attribute.  */
 
diff --git a/gcc/testsuite/c-c++-common/pragma-diag-17.c b/gcc/testsuite/c-c++-common/pragma-diag-17.c
index a44ce90..93206f0 100644
--- a/gcc/testsuite/c-c++-common/pragma-diag-17.c
+++ b/gcc/testsuite/c-c++-common/pragma-diag-17.c
@@ -1,5 +1,6 @@
 /* Test silencing the numeric constant extension pedwarns.  */
 /* { dg-options "-pedantic-errors" } */
+/* { dg-additional-options "-std=gnu17" { target c } } */
 /* { dg-additional-options -fext-numeric-literals { target c++14 } } */
 
 #pragma GCC diagnostic push
diff --git a/gcc/testsuite/c-c++-common/sizeof-array-argument.c b/gcc/testsuite/c-c++-common/sizeof-array-argument.c
index eedfcee..f2b2d33 100644
--- a/gcc/testsuite/c-c++-common/sizeof-array-argument.c
+++ b/gcc/testsuite/c-c++-common/sizeof-array-argument.c
@@ -1,5 +1,6 @@
 /* PR c/6940 */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-old-style-definition" { target c } } */
 
 /* Test -Wsizeof-array-argument warning.  */
 
diff --git a/gcc/testsuite/g++.dg/lto/pr54625-1_0.c b/gcc/testsuite/g++.dg/lto/pr54625-1_0.c
index b1455e8..59df1aa 100644
--- a/gcc/testsuite/g++.dg/lto/pr54625-1_0.c
+++ b/gcc/testsuite/g++.dg/lto/pr54625-1_0.c
@@ -1,5 +1,5 @@
 /* { dg-lto-do link } */
-/* { dg-lto-options { { -O0 -flto -w } { -O2 -flto -w } }  } */
+/* { dg-lto-options { { -O0 -flto -w -std=gnu17 } { -O2 -flto -w -std=gnu17 } }  } */
 /* { dg-extra-ld-options { -r -nostdlib -flinker-output=nolto-rel } } */
 
 float a;
diff --git a/gcc/testsuite/g++.dg/lto/pr54625-2_0.c b/gcc/testsuite/g++.dg/lto/pr54625-2_0.c
index 1ba463d..b7a53c6 100644
--- a/gcc/testsuite/g++.dg/lto/pr54625-2_0.c
+++ b/gcc/testsuite/g++.dg/lto/pr54625-2_0.c
@@ -1,5 +1,5 @@
 /* { dg-lto-do link } */
-/* { dg-lto-options { { -O0 -flto -w } { -O2 -flto -w } }  } */
+/* { dg-lto-options { { -O0 -flto -w -std=gnu17 } { -O2 -flto -w -std=gnu17 } }  } */
 /* { dg-extra-ld-options { -r -nostdlib -flinker-output=nolto-rel } } */
 
 float a;
diff --git a/gcc/testsuite/gcc.c-torture/compile/20040214-2.c b/gcc/testsuite/gcc.c-torture/compile/20040214-2.c
index 352d5a5..a4fe1d2 100644
--- a/gcc/testsuite/gcc.c-torture/compile/20040214-2.c
+++ b/gcc/testsuite/gcc.c-torture/compile/20040214-2.c
@@ -1,4 +1,5 @@
 /* http://gcc.gnu.org/ml/gcc-patches/2004-02/msg01307.html */
+/* { dg-additional-options "-std=gnu17" } */
 
 typedef struct xdef xdef;
 struct xdef
diff --git a/gcc/testsuite/gcc.c-torture/compile/921011-2.c b/gcc/testsuite/gcc.c-torture/compile/921011-2.c
index bf11dad..dbee954 100644
--- a/gcc/testsuite/gcc.c-torture/compile/921011-2.c
+++ b/gcc/testsuite/gcc.c-torture/compile/921011-2.c
@@ -1,3 +1,5 @@
+/* { dg-additional-options "-std=gnu17" } */
+
 extern int foobar1 ();
 
 typedef struct
diff --git a/gcc/testsuite/gcc.c-torture/compile/931102-1.c b/gcc/testsuite/gcc.c-torture/compile/931102-1.c
index f60b279..83568c1 100644
--- a/gcc/testsuite/gcc.c-torture/compile/931102-1.c
+++ b/gcc/testsuite/gcc.c-torture/compile/931102-1.c
@@ -1,3 +1,5 @@
+/* { dg-additional-options "-std=gnu17" } */
+
 char *e ();
 
 #define SET \
diff --git a/gcc/testsuite/gcc.c-torture/compile/990801-1.c b/gcc/testsuite/gcc.c-torture/compile/990801-1.c
index d35ec87..6459a11 100644
--- a/gcc/testsuite/gcc.c-torture/compile/990801-1.c
+++ b/gcc/testsuite/gcc.c-torture/compile/990801-1.c
@@ -1,3 +1,5 @@
+/* { dg-additional-options "-std=gnu17" } */
+
 extern int getch();
 extern int class();
 
diff --git a/gcc/testsuite/gcc.c-torture/compile/nested-1.c b/gcc/testsuite/gcc.c-torture/compile/nested-1.c
index 135538a..7baade7 100644
--- a/gcc/testsuite/gcc.c-torture/compile/nested-1.c
+++ b/gcc/testsuite/gcc.c-torture/compile/nested-1.c
@@ -1,3 +1,4 @@
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-require-effective-target trampolines } */
 
 typedef __SIZE_TYPE__ size_t;
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr100241-1.c b/gcc/testsuite/gcc.c-torture/compile/pr100241-1.c
index 593ef96..1104580 100644
--- a/gcc/testsuite/gcc.c-torture/compile/pr100241-1.c
+++ b/gcc/testsuite/gcc.c-torture/compile/pr100241-1.c
@@ -1,5 +1,6 @@
 /* { dg-require-visibility "" } */
 /* { dg-options "-fvisibility=internal -fPIC" { target fpic } } */
+/* { dg-additional-options "-std=gnu17" } */
 
 extern char num_4x4_blocks_high_lookup, num_4x4_blocks_wide_lookup,
     vp9_foreach_transformed_block_in_plane_xd_0_0_0;
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr106101.c b/gcc/testsuite/gcc.c-torture/compile/pr106101.c
index e307afc..664ecec 100644
--- a/gcc/testsuite/gcc.c-torture/compile/pr106101.c
+++ b/gcc/testsuite/gcc.c-torture/compile/pr106101.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 extern char *globerr;
 char **ftpglob();
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr113616.c b/gcc/testsuite/gcc.c-torture/compile/pr113616.c
index 04c38ea..a862e8b 100644
--- a/gcc/testsuite/gcc.c-torture/compile/pr113616.c
+++ b/gcc/testsuite/gcc.c-torture/compile/pr113616.c
@@ -1,5 +1,5 @@
 // { dg-do compile }
-// { dg-options "-g" }
+// { dg-options "-std=gnu17 -g" }
 struct A { struct A *a; } foo ();
 struct B { long b; };
 struct C { struct B c; struct A d; } *e;
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr47967.c b/gcc/testsuite/gcc.c-torture/compile/pr47967.c
index fe1f9c2..39d73c6 100644
--- a/gcc/testsuite/gcc.c-torture/compile/pr47967.c
+++ b/gcc/testsuite/gcc.c-torture/compile/pr47967.c
@@ -1,4 +1,5 @@
 /* PR tree-optimization/47967 */
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-require-effective-target untyped_assembly } */
 
 extern void abort (void);
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr51694.c b/gcc/testsuite/gcc.c-torture/compile/pr51694.c
index 9eddc0b..00e6ea3 100644
--- a/gcc/testsuite/gcc.c-torture/compile/pr51694.c
+++ b/gcc/testsuite/gcc.c-torture/compile/pr51694.c
@@ -1,6 +1,6 @@
 /* { dg-require-effective-target untyped_assembly } */
 /* { dg-require-effective-target indirect_calls } */
-/* { dg-additional-options "-fpermissive" } */
+/* { dg-additional-options "-std=gnu17 -fpermissive" } */
 
 void
 foo (x, fn)
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr71109.c b/gcc/testsuite/gcc.c-torture/compile/pr71109.c
index b44ba07..fae98fb 100644
--- a/gcc/testsuite/gcc.c-torture/compile/pr71109.c
+++ b/gcc/testsuite/gcc.c-torture/compile/pr71109.c
@@ -1,4 +1,5 @@
 /* PR tree-optimization/71109 */
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-require-effective-target non_strict_prototype } */
 
 struct S { int g, h; signed char i; int j; signed char k; int l[4]; } a, c;
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr83051-2.c b/gcc/testsuite/gcc.c-torture/compile/pr83051-2.c
index 4718a27..3d49ed8 100644
--- a/gcc/testsuite/gcc.c-torture/compile/pr83051-2.c
+++ b/gcc/testsuite/gcc.c-torture/compile/pr83051-2.c
@@ -1,4 +1,4 @@
-/* { dg-options "-fno-early-inlining" } */
+/* { dg-options "-std=gnu17 -fno-early-inlining" } */
 /* { dg-require-effective-target non_strict_prototype } */
 
 void
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr89663-1.c b/gcc/testsuite/gcc.c-torture/compile/pr89663-1.c
index 659925d..13ffa90 100644
--- a/gcc/testsuite/gcc.c-torture/compile/pr89663-1.c
+++ b/gcc/testsuite/gcc.c-torture/compile/pr89663-1.c
@@ -1,4 +1,5 @@
 /* PR middle-end/89663 */
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-require-effective-target non_strict_prototype } */
 
 int irint ();
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr94238.c b/gcc/testsuite/gcc.c-torture/compile/pr94238.c
index 5a96a64..0d32ceb 100644
--- a/gcc/testsuite/gcc.c-torture/compile/pr94238.c
+++ b/gcc/testsuite/gcc.c-torture/compile/pr94238.c
@@ -1,3 +1,5 @@
+/* { dg-additional-options "-std=gnu17" } */
+
 enum { false, true } a;
 int b, c, d, e, f;
 int fn3();
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr96796.c b/gcc/testsuite/gcc.c-torture/compile/pr96796.c
index debbe62..8deee01 100644
--- a/gcc/testsuite/gcc.c-torture/compile/pr96796.c
+++ b/gcc/testsuite/gcc.c-torture/compile/pr96796.c
@@ -1,4 +1,4 @@
-/* { dg-additional-options "-fpermissive -fcommon" } */
+/* { dg-additional-options "-std=gnu17 -fpermissive -fcommon" } */
 /* { dg-require-effective-target non_strict_prototype } */
 
 struct S0 {
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr97576.c b/gcc/testsuite/gcc.c-torture/compile/pr97576.c
index d281613..4bcadab 100644
--- a/gcc/testsuite/gcc.c-torture/compile/pr97576.c
+++ b/gcc/testsuite/gcc.c-torture/compile/pr97576.c
@@ -1,3 +1,4 @@
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-require-effective-target non_strict_prototype } */
 
 void
diff --git a/gcc/testsuite/gcc.c-torture/compile/udivmod4.c b/gcc/testsuite/gcc.c-torture/compile/udivmod4.c
index 9d98a3d..5297dc9 100644
--- a/gcc/testsuite/gcc.c-torture/compile/udivmod4.c
+++ b/gcc/testsuite/gcc.c-torture/compile/udivmod4.c
@@ -1,4 +1,4 @@
-/* { dg-additional-options "-fpermissive" } */
+/* { dg-additional-options "-std=gnu17 -fpermissive" } */
 
 long long
 xlrandom ()
diff --git a/gcc/testsuite/gcc.c-torture/execute/20010605-2.c b/gcc/testsuite/gcc.c-torture/execute/20010605-2.c
index 837e0a9..ef435bc 100644
--- a/gcc/testsuite/gcc.c-torture/execute/20010605-2.c
+++ b/gcc/testsuite/gcc.c-torture/execute/20010605-2.c
@@ -1,4 +1,4 @@
-/* { dg-additional-options "-fpermissive" } */
+/* { dg-additional-options "-std=gnu17 -fpermissive" } */
 
 void foo (), bar (), baz ();
 int main ()
diff --git a/gcc/testsuite/gcc.c-torture/execute/20020404-1.c b/gcc/testsuite/gcc.c-torture/execute/20020404-1.c
index 53b3408..95b0adc 100644
--- a/gcc/testsuite/gcc.c-torture/execute/20020404-1.c
+++ b/gcc/testsuite/gcc.c-torture/execute/20020404-1.c
@@ -1,4 +1,5 @@
 /* { dg-require-effective-target int32plus } */
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-skip-if "pointers can be truncated" { m32c-*-* } } */
 /* Extracted from GDB sources. */
 
diff --git a/gcc/testsuite/gcc.c-torture/execute/20030714-1.c b/gcc/testsuite/gcc.c-torture/execute/20030714-1.c
index 719baed..443fea8 100644
--- a/gcc/testsuite/gcc.c-torture/execute/20030714-1.c
+++ b/gcc/testsuite/gcc.c-torture/execute/20030714-1.c
@@ -1,4 +1,5 @@
 /* derived from PR optimization/11440  */
+/* { dg-additional-options "-std=gnu17" } */
 
 extern void abort (void);
 extern void exit (int);
diff --git a/gcc/testsuite/gcc.c-torture/execute/20051012-1.c b/gcc/testsuite/gcc.c-torture/execute/20051012-1.c
index d43aeda..e9240da 100644
--- a/gcc/testsuite/gcc.c-torture/execute/20051012-1.c
+++ b/gcc/testsuite/gcc.c-torture/execute/20051012-1.c
@@ -1,3 +1,4 @@
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-require-effective-target untyped_assembly } */
 extern void abort (void);
 
diff --git a/gcc/testsuite/gcc.c-torture/execute/20190820-1.c b/gcc/testsuite/gcc.c-torture/execute/20190820-1.c
index 10e48d3..c122ff3 100644
--- a/gcc/testsuite/gcc.c-torture/execute/20190820-1.c
+++ b/gcc/testsuite/gcc.c-torture/execute/20190820-1.c
@@ -1,5 +1,6 @@
 /* PR rtl-optimization/91347 */
 /* Reported by John David Anglin <danglin@gcc.gnu.org> */
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-require-effective-target int32plus } */
 
 typedef unsigned short __u16;
diff --git a/gcc/testsuite/gcc.c-torture/execute/920612-1.c b/gcc/testsuite/gcc.c-torture/execute/920612-1.c
index 8553de2..2f369b5 100644
--- a/gcc/testsuite/gcc.c-torture/execute/920612-1.c
+++ b/gcc/testsuite/gcc.c-torture/execute/920612-1.c
@@ -1,4 +1,4 @@
-/* { dg-options "-fwrapv" } */
+/* { dg-options "-Wno-old-style-definition -fwrapv" } */
 
 extern void abort (void);
 extern void exit (int);
diff --git a/gcc/testsuite/gcc.c-torture/execute/930608-1.c b/gcc/testsuite/gcc.c-torture/execute/930608-1.c
index 1f29aa5..fd26759 100644
--- a/gcc/testsuite/gcc.c-torture/execute/930608-1.c
+++ b/gcc/testsuite/gcc.c-torture/execute/930608-1.c
@@ -1,3 +1,5 @@
+/* { dg-additional-options "-std=gnu17" } */
+
 void abort (void);
 void exit (int);
 
diff --git a/gcc/testsuite/gcc.c-torture/execute/comp-goto-1.c b/gcc/testsuite/gcc.c-torture/execute/comp-goto-1.c
index 6be63c0..7bfc9d4 100644
--- a/gcc/testsuite/gcc.c-torture/execute/comp-goto-1.c
+++ b/gcc/testsuite/gcc.c-torture/execute/comp-goto-1.c
@@ -1,3 +1,4 @@
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-require-effective-target label_values } */
 /* { dg-require-stack-size "4000" } */
 
diff --git a/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-1.x b/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-1.x
index 84c193f..ec107bc 100644
--- a/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-1.x
+++ b/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-1.x
@@ -13,4 +13,6 @@ if [istarget "arm*-*-vxworks*"] {
     }
 }
 
+lappend additional_flags "-std=gnu17"
+
 return 0
diff --git a/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-2.x b/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-2.x
index 84c193f..ec107bc 100644
--- a/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-2.x
+++ b/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-2.x
@@ -13,4 +13,6 @@ if [istarget "arm*-*-vxworks*"] {
     }
 }
 
+lappend additional_flags "-std=gnu17"
+
 return 0
diff --git a/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-3.x b/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-3.x
index 84c193f..ec107bc 100644
--- a/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-3.x
+++ b/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-3.x
@@ -13,4 +13,6 @@ if [istarget "arm*-*-vxworks*"] {
     }
 }
 
+lappend additional_flags "-std=gnu17"
+
 return 0
diff --git a/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-4.x b/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-4.x
new file mode 100644
index 0000000..9baf8e1
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-4.x
@@ -0,0 +1,2 @@
+lappend additional_flags "-std=gnu17"
+return 0
diff --git a/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-4f.x b/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-4f.x
new file mode 100644
index 0000000..9baf8e1
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-4f.x
@@ -0,0 +1,2 @@
+lappend additional_flags "-std=gnu17"
+return 0
diff --git a/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-4l.x b/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-4l.x
new file mode 100644
index 0000000..9baf8e1
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-4l.x
@@ -0,0 +1,2 @@
+lappend additional_flags "-std=gnu17"
+return 0
diff --git a/gcc/testsuite/gcc.c-torture/execute/loop-9.c b/gcc/testsuite/gcc.c-torture/execute/loop-9.c
index 5230575..c0798c3 100644
--- a/gcc/testsuite/gcc.c-torture/execute/loop-9.c
+++ b/gcc/testsuite/gcc.c-torture/execute/loop-9.c
@@ -1,4 +1,5 @@
 /* Source: Neil Booth, from PR # 115.  */
+/* { dg-additional-options "-std=gnu17" } */
 
 int false()
 {
diff --git a/gcc/testsuite/gcc.c-torture/execute/pr103209.c b/gcc/testsuite/gcc.c-torture/execute/pr103209.c
index 4816893..ecc2312 100644
--- a/gcc/testsuite/gcc.c-torture/execute/pr103209.c
+++ b/gcc/testsuite/gcc.c-torture/execute/pr103209.c
@@ -1,3 +1,5 @@
+/* { dg-additional-options "-std=gnu17" } */
+
 #include <stdio.h>
 #include <stdint.h>
 
diff --git a/gcc/testsuite/gcc.c-torture/execute/pr28289.c b/gcc/testsuite/gcc.c-torture/execute/pr28289.c
index 93e922c..276a0f4 100644
--- a/gcc/testsuite/gcc.c-torture/execute/pr28289.c
+++ b/gcc/testsuite/gcc.c-torture/execute/pr28289.c
@@ -1,3 +1,5 @@
+/* { dg-additional-options "-std=gnu17" } */
+
 extern int ok (int);
 extern void exit ();
 static int gen_x86_64_shrd (int);
diff --git a/gcc/testsuite/gcc.c-torture/execute/pr34982.c b/gcc/testsuite/gcc.c-torture/execute/pr34982.c
index 1500847..4289a18 100644
--- a/gcc/testsuite/gcc.c-torture/execute/pr34982.c
+++ b/gcc/testsuite/gcc.c-torture/execute/pr34982.c
@@ -1,3 +1,5 @@
+/* { dg-additional-options "-std=gnu17" } */
+
 extern void abort (void);
 
 static void something();
diff --git a/gcc/testsuite/gcc.c-torture/execute/pr67037.c b/gcc/testsuite/gcc.c-torture/execute/pr67037.c
index 3119d32..da626e8 100644
--- a/gcc/testsuite/gcc.c-torture/execute/pr67037.c
+++ b/gcc/testsuite/gcc.c-torture/execute/pr67037.c
@@ -1,3 +1,5 @@
+/* { dg-additional-options "-std=gnu17" } */
+
 long (*extfunc)();
 
 static inline void lstrcpynW( short *d, const short *s, int n )
diff --git a/gcc/testsuite/gcc.c-torture/execute/va-arg-2.c b/gcc/testsuite/gcc.c-torture/execute/va-arg-2.c
index 56f8e14..d44cefc 100644
--- a/gcc/testsuite/gcc.c-torture/execute/va-arg-2.c
+++ b/gcc/testsuite/gcc.c-torture/execute/va-arg-2.c
@@ -2,6 +2,7 @@
    in regs and on the stack.  We test 16 cases, trying to catch multiple
    targets (some use 3 regs for argument passing, some use 12, etc.).
    We test both the arguments and the `lastarg' (the argument to va_start).  */
+/* { dg-additional-options "-std=gnu17" } */
 
 #include <stdarg.h>
 
diff --git a/gcc/testsuite/gcc.dg/20010202-1.c b/gcc/testsuite/gcc.dg/20010202-1.c
index 5f78904..418e552 100644
--- a/gcc/testsuite/gcc.dg/20010202-1.c
+++ b/gcc/testsuite/gcc.dg/20010202-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target i?86-*-* sparc*-*-* x86_64-*-* } } */
-/* { dg-options "-O2" } */
+/* { dg-options "-std=gnu17 -O2" } */
 
 extern void abort (void);
 extern void exit (int);
diff --git a/gcc/testsuite/gcc.dg/20020430-1.c b/gcc/testsuite/gcc.dg/20020430-1.c
index f48bb67..2690b38 100644
--- a/gcc/testsuite/gcc.dg/20020430-1.c
+++ b/gcc/testsuite/gcc.dg/20020430-1.c
@@ -5,7 +5,7 @@
    which left a reference to the deleted ADDR_VEC.  */
 
 /* { dg-do compile { target fpic } } */
-/* { dg-options "-O2 -frename-registers -fpic" } */
+/* { dg-options "-std=gnu17 -O2 -frename-registers -fpic" } */
 /* { dg-skip-if "too many arguments in function call" { bpf-*-* } } */
 
 typedef unsigned long XID;
diff --git a/gcc/testsuite/gcc.dg/20031218-3.c b/gcc/testsuite/gcc.dg/20031218-3.c
index 0bae456..10f8e77 100644
--- a/gcc/testsuite/gcc.dg/20031218-3.c
+++ b/gcc/testsuite/gcc.dg/20031218-3.c
@@ -3,7 +3,7 @@
    The problem was that this just to ICE with -O2 -g.  */
 
 /* { dg-do compile } */
-/* { dg-options "-O2 -g" } */
+/* { dg-options "-std=gnu17 -O2 -g" } */
 
 extern __SIZE_TYPE__ strlen (const char *);
 
diff --git a/gcc/testsuite/gcc.dg/20040127-1.c b/gcc/testsuite/gcc.dg/20040127-1.c
index 0ea6062..3295dee 100644
--- a/gcc/testsuite/gcc.dg/20040127-1.c
+++ b/gcc/testsuite/gcc.dg/20040127-1.c
@@ -5,7 +5,7 @@
    floating-point registers on SPARC64.  */
 
 /* { dg-do assemble } */
-/* { dg-options "-O2" } */
+/* { dg-options "-std=gnu17 -O2" } */
 
 extern int foo1();
 extern int foo2();
diff --git a/gcc/testsuite/gcc.dg/20041014-1.c b/gcc/testsuite/gcc.dg/20041014-1.c
index 6998440..b2e9959 100644
--- a/gcc/testsuite/gcc.dg/20041014-1.c
+++ b/gcc/testsuite/gcc.dg/20041014-1.c
@@ -1,6 +1,6 @@
 /* PR c/17023 */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-Wno-old-style-definition" } */
 
 void
 f(a, b)
diff --git a/gcc/testsuite/gcc.dg/20041122-1.c b/gcc/testsuite/gcc.dg/20041122-1.c
index b2120f81..889c781 100644
--- a/gcc/testsuite/gcc.dg/20041122-1.c
+++ b/gcc/testsuite/gcc.dg/20041122-1.c
@@ -1,6 +1,6 @@
 /* PR rtl-optimization/18611 */
 /* { dg-do compile } */
-/* { dg-options "-O1 -fmove-loop-invariants" } */
+/* { dg-options "-std=gnu17 -O1 -fmove-loop-invariants" } */
 
 void dumpCineonChannelInfo ();
 typedef struct {
diff --git a/gcc/testsuite/gcc.dg/20050309-1.c b/gcc/testsuite/gcc.dg/20050309-1.c
index 46b27f8..d17bdaf 100644
--- a/gcc/testsuite/gcc.dg/20050309-1.c
+++ b/gcc/testsuite/gcc.dg/20050309-1.c
@@ -3,7 +3,7 @@
 
 /* { dg-do compile } */
 /* { dg-require-profiling "-fprofile-generate" } */
-/* { dg-options "-O2 -fprofile-generate" } */
+/* { dg-options "-std=gnu17 -O2 -fprofile-generate" } */
 
 void lookup ();
 int hash ();
diff --git a/gcc/testsuite/gcc.dg/20061026.c b/gcc/testsuite/gcc.dg/20061026.c
index fa8069c..dbba84e 100644
--- a/gcc/testsuite/gcc.dg/20061026.c
+++ b/gcc/testsuite/gcc.dg/20061026.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O1" } */
+/* { dg-options "-std=gnu17 -O1" } */
 /* { dg-skip-if "exceeds eBPF stack limit" { bpf-*-* } } */
 
 /* This testcase failed on s390.  The frame size for function f will be
diff --git a/gcc/testsuite/gcc.dg/20101010-1.c b/gcc/testsuite/gcc.dg/20101010-1.c
index 2067012..d470717 100644
--- a/gcc/testsuite/gcc.dg/20101010-1.c
+++ b/gcc/testsuite/gcc.dg/20101010-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-crossjumping" } */
+/* { dg-options "-std=gnu17 -O2 -fno-crossjumping" } */
 /* { dg-require-effective-target alloca } */
 
 int bar1 ();
diff --git a/gcc/testsuite/gcc.dg/Warray-parameter-10.c b/gcc/testsuite/gcc.dg/Warray-parameter-10.c
index 378f8af..b10a82d 100644
--- a/gcc/testsuite/gcc.dg/Warray-parameter-10.c
+++ b/gcc/testsuite/gcc.dg/Warray-parameter-10.c
@@ -1,7 +1,7 @@
 /* PR c/102759 - ICE calling a function taking an argument redeclared
    without a prototype.
    { dg-do compile }
-   { dg-options "-Wall" } */
+   { dg-options "-std=gnu17 -Wall" } */
 
 void f (void)
 {
diff --git a/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-2.c b/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-2.c
index 9d75cd8..42733cd 100644
--- a/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-2.c
+++ b/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-2.c
@@ -1,7 +1,7 @@
 /* PR c/83656 - missing -Wbuiltin-declaration-mismatch on declaration
    without prototype
    { dg-do compile }
-   { dg-options "-Wall -Wextra" } */
+   { dg-options "-std=gnu17 -Wall -Wextra" } */
 
 typedef __SIZE_TYPE__ size_t;
 
diff --git a/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-3.c b/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-3.c
index bc65279..91363ed 100644
--- a/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-3.c
+++ b/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-3.c
@@ -1,7 +1,7 @@
 /* PR c/83656 - missing -Wbuiltin-declaration-mismatch on declaration
    without prototype
    { dg-do compile }
-   { dg-options "-fpermissive -Wbuiltin-declaration-mismatch" } */
+   { dg-options "-std=gnu17 -fpermissive -Wbuiltin-declaration-mismatch" } */
 
 typedef __SIZE_TYPE__ size_t;
 
diff --git a/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-4.c b/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-4.c
index e845b43..c48fe5f 100644
--- a/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-4.c
+++ b/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-4.c
@@ -1,7 +1,7 @@
 /* PR c/83656 - missing -Wbuiltin-declaration-mismatch on declaration
    without prototype
    { dg-do compile }
-   { dg-options "-Wbuiltin-declaration-mismatch" } */
+   { dg-options "-std=gnu17 -Wbuiltin-declaration-mismatch" } */
 
 typedef __PTRDIFF_TYPE__ ptrdiff_t;
 typedef __SIZE_TYPE__    size_t;
diff --git a/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-5.c b/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-5.c
index 9cac927..08e677e 100644
--- a/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-5.c
+++ b/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch-5.c
@@ -1,6 +1,6 @@
 /* PR testsuite/88098 - FAIL: gcc.dg/Wbuiltin-declaration-mismatch-4.c
    { dg-do compile }
-   { dg-options "-Wbuiltin-declaration-mismatch -fshort-enums" } */
+   { dg-options "-std=gnu17 -Wbuiltin-declaration-mismatch -fshort-enums" } */
 
 int abs ();
 double fabs ();     /* { dg-message "built-in .fabs. declared here" } */
diff --git a/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch.c b/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch.c
index ed66fd3..fb456e0 100644
--- a/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch.c
+++ b/gcc/testsuite/gcc.dg/Wbuiltin-declaration-mismatch.c
@@ -1,7 +1,7 @@
 /* PR c/83656 - missing -Wbuiltin-declaration-mismatch on declaration
    without prototype
    { dg-do compile }
-   { dg-options "-Wall" } */
+   { dg-options "-std=gnu17 -Wall" } */
 
 typedef __SIZE_TYPE__ size_t;
 
diff --git a/gcc/testsuite/gcc.dg/Wcxx-compat-2.c b/gcc/testsuite/gcc.dg/Wcxx-compat-2.c
index 4578bec..938414a 100644
--- a/gcc/testsuite/gcc.dg/Wcxx-compat-2.c
+++ b/gcc/testsuite/gcc.dg/Wcxx-compat-2.c
@@ -1,4 +1,4 @@
-/* { dg-options "-Wc++-compat" } */
+/* { dg-options "-std=gnu17 -Wc++-compat" } */
 
 _Bool foo;			/* This is okay.  */
 int bool;			/* { dg-warning "5:keyword" } */
diff --git a/gcc/testsuite/gcc.dg/Wdouble-promotion.c b/gcc/testsuite/gcc.dg/Wdouble-promotion.c
index 0ad7791..c002b2e 100644
--- a/gcc/testsuite/gcc.dg/Wdouble-promotion.c
+++ b/gcc/testsuite/gcc.dg/Wdouble-promotion.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-fpermissive -Wdouble-promotion" } */
+/* { dg-options "-std=gnu17 -fpermissive -Wdouble-promotion" } */
 
 #include <stddef.h>
 
diff --git a/gcc/testsuite/gcc.dg/Wfree-nonheap-object-7.c b/gcc/testsuite/gcc.dg/Wfree-nonheap-object-7.c
index 6116bfa..52cfbf9 100644
--- a/gcc/testsuite/gcc.dg/Wfree-nonheap-object-7.c
+++ b/gcc/testsuite/gcc.dg/Wfree-nonheap-object-7.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -Wfree-nonheap-object" } */
+/* { dg-options "-std=gnu17 -O2 -Wfree-nonheap-object" } */
 
 struct local_caches *get_local_caches_lcs;
 void *calloc(long, long);
diff --git a/gcc/testsuite/gcc.dg/Wimplicit-int-1.c b/gcc/testsuite/gcc.dg/Wimplicit-int-1.c
index fc7726c..206db40 100644
--- a/gcc/testsuite/gcc.dg/Wimplicit-int-1.c
+++ b/gcc/testsuite/gcc.dg/Wimplicit-int-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-fpermissive" } */
+/* { dg-options "-std=gnu17 -fpermissive" } */
 
 static l; /* { dg-warning "type defaults to" } */
 
diff --git a/gcc/testsuite/gcc.dg/Wimplicit-int-1a.c b/gcc/testsuite/gcc.dg/Wimplicit-int-1a.c
index ef1835e..0f7880d 100644
--- a/gcc/testsuite/gcc.dg/Wimplicit-int-1a.c
+++ b/gcc/testsuite/gcc.dg/Wimplicit-int-1a.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17 " } */
 
 static l; /* { dg-error "type defaults to" } */
 
diff --git a/gcc/testsuite/gcc.dg/Wimplicit-int-2.c b/gcc/testsuite/gcc.dg/Wimplicit-int-2.c
index 4ff16f3..cd2c1ef 100644
--- a/gcc/testsuite/gcc.dg/Wimplicit-int-2.c
+++ b/gcc/testsuite/gcc.dg/Wimplicit-int-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-pedantic-errors" } */
+/* { dg-options "-std=gnu17 -pedantic-errors" } */
 
 static l; /* { dg-error "type defaults to" } */
 
diff --git a/gcc/testsuite/gcc.dg/Wimplicit-int-3.c b/gcc/testsuite/gcc.dg/Wimplicit-int-3.c
index 654ce73..5980c81 100644
--- a/gcc/testsuite/gcc.dg/Wimplicit-int-3.c
+++ b/gcc/testsuite/gcc.dg/Wimplicit-int-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-pedantic-errors -Wno-implicit-int" } */
+/* { dg-options "-std=gnu17 -pedantic-errors -Wno-implicit-int" } */
 
 static l;
 
diff --git a/gcc/testsuite/gcc.dg/Wimplicit-int-4.c b/gcc/testsuite/gcc.dg/Wimplicit-int-4.c
index 99c61a7..28f5da5 100644
--- a/gcc/testsuite/gcc.dg/Wimplicit-int-4.c
+++ b/gcc/testsuite/gcc.dg/Wimplicit-int-4.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-fpermissive -Wno-implicit -Wimplicit-int" } */
+/* { dg-options "-std=gnu17 -fpermissive -Wno-implicit -Wimplicit-int" } */
 
 static l; /* { dg-warning "type defaults to" } */
 
diff --git a/gcc/testsuite/gcc.dg/Wimplicit-int-4a.c b/gcc/testsuite/gcc.dg/Wimplicit-int-4a.c
index 920a088..b507620 100644
--- a/gcc/testsuite/gcc.dg/Wimplicit-int-4a.c
+++ b/gcc/testsuite/gcc.dg/Wimplicit-int-4a.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-Wno-implicit -Wimplicit-int" } */
+/* { dg-options "-std=gnu17 -Wno-implicit -Wimplicit-int" } */
 
 static l; /* { dg-error "type defaults to" } */
 
diff --git a/gcc/testsuite/gcc.dg/Wincompatible-pointer-types-1.c b/gcc/testsuite/gcc.dg/Wincompatible-pointer-types-1.c
index 4ae7b1d..4e47a30 100644
--- a/gcc/testsuite/gcc.dg/Wincompatible-pointer-types-1.c
+++ b/gcc/testsuite/gcc.dg/Wincompatible-pointer-types-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-pedantic-errors" } */
+/* { dg-options "-std=gnu17 -pedantic-errors" } */
 
 void f (int, ...);
 
diff --git a/gcc/testsuite/gcc.dg/Wrestrict-19.c b/gcc/testsuite/gcc.dg/Wrestrict-19.c
index d475053..73b4302 100644
--- a/gcc/testsuite/gcc.dg/Wrestrict-19.c
+++ b/gcc/testsuite/gcc.dg/Wrestrict-19.c
@@ -1,7 +1,7 @@
 /* PR middle-end/89934 - ICE on a call with fewer arguments to strncpy
    declared without prototype
    { dg-do compile }
-   { dg-options "-O2 -Wall" } */
+   { dg-options "-std=gnu17 -O2 -Wall" } */
 
 typedef __SIZE_TYPE__ size_t;
 
diff --git a/gcc/testsuite/gcc.dg/Wrestrict-4.c b/gcc/testsuite/gcc.dg/Wrestrict-4.c
index a95960e..e7b62af 100644
--- a/gcc/testsuite/gcc.dg/Wrestrict-4.c
+++ b/gcc/testsuite/gcc.dg/Wrestrict-4.c
@@ -4,7 +4,7 @@
    without a prototype don't cause an ICE.
    { dg-do compile }
    { dg-prune-output "conflicting types for built-in" }
-   { dg-options "-O2 -Warray-bounds -Wrestrict" } */
+   { dg-options "-std=gnu17 -O2 -Warray-bounds -Wrestrict" } */
 
 void* memcpy ();
 void* memmove ();
diff --git a/gcc/testsuite/gcc.dg/Wrestrict-5.c b/gcc/testsuite/gcc.dg/Wrestrict-5.c
index 4ea9176..00f9423 100644
--- a/gcc/testsuite/gcc.dg/Wrestrict-5.c
+++ b/gcc/testsuite/gcc.dg/Wrestrict-5.c
@@ -4,7 +4,7 @@
    functions declared with no prototype are checked for overlap, and that
    invalid calls are ignored.
   { dg-do compile }
-  { dg-options "-O2 -fpermissive -Wrestrict" }  */
+  { dg-options "-std=gnu17 -O2 -fpermissive -Wrestrict" }  */
 
 void* memcpy ();
 char* strncpy ();
diff --git a/gcc/testsuite/gcc.dg/Wstrict-overflow-20.c b/gcc/testsuite/gcc.dg/Wstrict-overflow-20.c
index ae2db93..260d20c 100644
--- a/gcc/testsuite/gcc.dg/Wstrict-overflow-20.c
+++ b/gcc/testsuite/gcc.dg/Wstrict-overflow-20.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-fstrict-overflow -O2 -Wstrict-overflow" } */
+/* { dg-options "-std=gnu17 -fstrict-overflow -O2 -Wstrict-overflow" } */
 
 /* Don't warn about an overflow in a copied loop header.  We used to
    get a warning in value numbering.  This is PR 33565.  */
diff --git a/gcc/testsuite/gcc.dg/Wstringop-overflow-13.c b/gcc/testsuite/gcc.dg/Wstringop-overflow-13.c
index 021eaae..2c88290 100644
--- a/gcc/testsuite/gcc.dg/Wstringop-overflow-13.c
+++ b/gcc/testsuite/gcc.dg/Wstringop-overflow-13.c
@@ -3,7 +3,7 @@
    PR middle-end/89911 - ICE on a call with no arguments to strnlen
    declared with no prototype
    { dg-do compile }
-   { dg-options "-O2 -fpermissive -Wall" } */
+   { dg-options "-std=gnu17 -O2 -fpermissive -Wall" } */
 
 typedef __SIZE_TYPE__ size_t;
 
diff --git a/gcc/testsuite/gcc.dg/analyzer/doom-d_main-IdentifyVersion.c b/gcc/testsuite/gcc.dg/analyzer/doom-d_main-IdentifyVersion.c
index 982b9b7..1605047 100644
--- a/gcc/testsuite/gcc.dg/analyzer/doom-d_main-IdentifyVersion.c
+++ b/gcc/testsuite/gcc.dg/analyzer/doom-d_main-IdentifyVersion.c
@@ -1,6 +1,6 @@
 /* Reduced from Doom's d_main.c, which is under the GPLv2 or later.  */
 
-/* { dg-additional-options "-Wno-analyzer-too-complex" } */
+/* { dg-additional-options "-std=gnu17 -Wno-analyzer-too-complex" } */
 
 typedef __SIZE_TYPE__ size_t;
 typedef struct _IO_FILE FILE;
diff --git a/gcc/testsuite/gcc.dg/analyzer/doom-s_sound-pr108867.c b/gcc/testsuite/gcc.dg/analyzer/doom-s_sound-pr108867.c
index fdc21a2..ac0a789 100644
--- a/gcc/testsuite/gcc.dg/analyzer/doom-s_sound-pr108867.c
+++ b/gcc/testsuite/gcc.dg/analyzer/doom-s_sound-pr108867.c
@@ -1,6 +1,6 @@
 /* Reduced from Doom's linuxdoom-1.10/s_sound.c, which is GPLv2 or later.  */
 
-/* { dg-additional-options "-fno-analyzer-call-summaries -Wno-analyzer-too-complex -Wno-analyzer-symbol-too-complex" } */
+/* { dg-additional-options "-std=gnu17 -fno-analyzer-call-summaries -Wno-analyzer-too-complex -Wno-analyzer-symbol-too-complex" } */
 /* { dg-require-effective-target size32plus } */
 
 typedef struct _IO_FILE FILE;
diff --git a/gcc/testsuite/gcc.dg/analyzer/pr93032-mztools-signed-char.c b/gcc/testsuite/gcc.dg/analyzer/pr93032-mztools-signed-char.c
index 7a7320f..1941e49 100644
--- a/gcc/testsuite/gcc.dg/analyzer/pr93032-mztools-signed-char.c
+++ b/gcc/testsuite/gcc.dg/analyzer/pr93032-mztools-signed-char.c
@@ -4,7 +4,7 @@
    removed.  */
 
 /* { dg-do "compile" } */
-/* { dg-additional-options "-fsigned-char" } */
+/* { dg-additional-options "-Wno-old-style-definition -fsigned-char" } */
 /* { dg-require-effective-target int32plus } */
 
 /* TODO (PR analyzer/112528): remove need for this.  */
diff --git a/gcc/testsuite/gcc.dg/analyzer/pr93032-mztools-unsigned-char.c b/gcc/testsuite/gcc.dg/analyzer/pr93032-mztools-unsigned-char.c
index 1083275..ca7ab13 100644
--- a/gcc/testsuite/gcc.dg/analyzer/pr93032-mztools-unsigned-char.c
+++ b/gcc/testsuite/gcc.dg/analyzer/pr93032-mztools-unsigned-char.c
@@ -4,7 +4,7 @@
    removed.  */
 
 /* { dg-do "compile" } */
-/* { dg-additional-options "-funsigned-char" } */
+/* { dg-additional-options "-Wno-old-style-definition -funsigned-char" } */
 /* { dg-require-effective-target int32plus } */
 
 /* TODO (PR analyzer/112528): remove need for this.  */
diff --git a/gcc/testsuite/gcc.dg/analyzer/pr93355-localealias.c b/gcc/testsuite/gcc.dg/analyzer/pr93355-localealias.c
index 88d0fc1..4ccba46 100644
--- a/gcc/testsuite/gcc.dg/analyzer/pr93355-localealias.c
+++ b/gcc/testsuite/gcc.dg/analyzer/pr93355-localealias.c
@@ -3,7 +3,7 @@
    Adapted from intl/localealias.c, with all #includes removed.  */
 
 /* { dg-do "compile" } */
-/* { dg-additional-options "-Wno-analyzer-too-complex" } */
+/* { dg-additional-options "-Wno-old-style-definition -Wno-analyzer-too-complex" } */
 /* TODO: remove the need for this option.  */
 /* { dg-require-effective-target alloca } */
 
diff --git a/gcc/testsuite/gcc.dg/analyzer/pr93375.c b/gcc/testsuite/gcc.dg/analyzer/pr93375.c
index f610854..34ca68b 100644
--- a/gcc/testsuite/gcc.dg/analyzer/pr93375.c
+++ b/gcc/testsuite/gcc.dg/analyzer/pr93375.c
@@ -1,4 +1,4 @@
-/* { dg-additional-options "-Wno-implicit-int" } */
+/* { dg-additional-options "-std=gnu17 -Wno-implicit-int" } */
 
 extern void foo (void *) __attribute__((nonnull));
 
diff --git a/gcc/testsuite/gcc.dg/analyzer/pr94688.c b/gcc/testsuite/gcc.dg/analyzer/pr94688.c
index 8ea8bc3..06152d1 100644
--- a/gcc/testsuite/gcc.dg/analyzer/pr94688.c
+++ b/gcc/testsuite/gcc.dg/analyzer/pr94688.c
@@ -1,3 +1,4 @@
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-skip-if "PR112705" { hppa*64*-*-* } } */
 int a, b;
 void d();
diff --git a/gcc/testsuite/gcc.dg/analyzer/sensitive-1.c b/gcc/testsuite/gcc.dg/analyzer/sensitive-1.c
index c66af92..ee82bb6 100644
--- a/gcc/testsuite/gcc.dg/analyzer/sensitive-1.c
+++ b/gcc/testsuite/gcc.dg/analyzer/sensitive-1.c
@@ -1,3 +1,5 @@
+/* { dg-additional-options "-std=gnu17" } */
+
 #include <stdio.h>
 
 /* Solaris needs this for <unistd.h> to declare getpass.  */
diff --git a/gcc/testsuite/gcc.dg/analyzer/torture/asm-x86-linux-wfx_get_ps_timeout-full.c b/gcc/testsuite/gcc.dg/analyzer/torture/asm-x86-linux-wfx_get_ps_timeout-full.c
index 4cbf432..f5329d8 100644
--- a/gcc/testsuite/gcc.dg/analyzer/torture/asm-x86-linux-wfx_get_ps_timeout-full.c
+++ b/gcc/testsuite/gcc.dg/analyzer/torture/asm-x86-linux-wfx_get_ps_timeout-full.c
@@ -1,6 +1,6 @@
 /* { dg-do compile { target x86_64-*-* } } */
 /* { dg-require-effective-target lp64 } */
-/* { dg-additional-options "-fsanitize=bounds -fno-analyzer-call-summaries" } */
+/* { dg-additional-options "-std=gnu17 -fsanitize=bounds -fno-analyzer-call-summaries" } */
 /* { dg-skip-if "" { *-*-* } { "-O0" } { "" } } */
 
 /* Reduced from linux kernel: drivers/staging/wfx/sta.c (GPL-2.0)
diff --git a/gcc/testsuite/gcc.dg/analyzer/torture/pr104863.c b/gcc/testsuite/gcc.dg/analyzer/torture/pr104863.c
index 30ed4fe..6487e96 100644
--- a/gcc/testsuite/gcc.dg/analyzer/torture/pr104863.c
+++ b/gcc/testsuite/gcc.dg/analyzer/torture/pr104863.c
@@ -1,4 +1,4 @@
-/* { dg-additional-options "-fanalyzer-transitivity" } */
+/* { dg-additional-options "-std=gnu17 -fanalyzer-transitivity" } */
 /* { dg-skip-if "" { *-*-* } { "-fno-fat-lto-objects" } { "" } } */
 
 extern void g();
diff --git a/gcc/testsuite/gcc.dg/analyzer/torture/pr93379.c b/gcc/testsuite/gcc.dg/analyzer/torture/pr93379.c
index 01465cf..6d6ac14 100644
--- a/gcc/testsuite/gcc.dg/analyzer/torture/pr93379.c
+++ b/gcc/testsuite/gcc.dg/analyzer/torture/pr93379.c
@@ -1,2 +1,3 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 #include "../../torture/pr57330.c"
diff --git a/gcc/testsuite/gcc.dg/array-quals-2.c b/gcc/testsuite/gcc.dg/array-quals-2.c
index 7f33e3f..e49330d 100644
--- a/gcc/testsuite/gcc.dg/array-quals-2.c
+++ b/gcc/testsuite/gcc.dg/array-quals-2.c
@@ -3,7 +3,7 @@
    lost in forming composite types.  */
 /* Origin: Joseph Myers <joseph@codesourcery.com> */
 /* { dg-do compile } */
-/* { dg-options "-pedantic -Wno-discarded-array-qualifiers" } */
+/* { dg-options "-std=gnu17 -pedantic -Wno-discarded-array-qualifiers" } */
 typedef const char T[1];
 typedef const char T2[1];
 typedef volatile char U[1];
diff --git a/gcc/testsuite/gcc.dg/attr-invalid.c b/gcc/testsuite/gcc.dg/attr-invalid.c
index a3315fa..87f3cbc 100644
--- a/gcc/testsuite/gcc.dg/attr-invalid.c
+++ b/gcc/testsuite/gcc.dg/attr-invalid.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-Wno-old-style-definition" } */
 
 #define CONCAT_(A,B) A ## B
 #define CONCAT(A,B) CONCAT_(A,B)
diff --git a/gcc/testsuite/gcc.dg/auto-init-uninit-A.c b/gcc/testsuite/gcc.dg/auto-init-uninit-A.c
index 0ef1d92..8347a60 100644
--- a/gcc/testsuite/gcc.dg/auto-init-uninit-A.c
+++ b/gcc/testsuite/gcc.dg/auto-init-uninit-A.c
@@ -2,6 +2,6 @@
    May be a real bug in CSE. */
 
 /* { dg-do compile } */
-/* { dg-options "-O2 -Wall -ftrivial-auto-var-init=zero" } */
+/* { dg-options "-O2 -Wall -Wno-old-style-definition -ftrivial-auto-var-init=zero" } */
 
 #include "uninit-A.c"
diff --git a/gcc/testsuite/gcc.dg/builtin-choose-expr.c b/gcc/testsuite/gcc.dg/builtin-choose-expr.c
index ceac605..e8c14b4 100644
--- a/gcc/testsuite/gcc.dg/builtin-choose-expr.c
+++ b/gcc/testsuite/gcc.dg/builtin-choose-expr.c
@@ -35,7 +35,7 @@
 
 
 extern void abort ();
-extern void exit ();
+extern void exit (int);
 
 void bad ()
 {
diff --git a/gcc/testsuite/gcc.dg/builtin-tgmath-err-1.c b/gcc/testsuite/gcc.dg/builtin-tgmath-err-1.c
index 9016ec7..de764e3 100644
--- a/gcc/testsuite/gcc.dg/builtin-tgmath-err-1.c
+++ b/gcc/testsuite/gcc.dg/builtin-tgmath-err-1.c
@@ -1,7 +1,7 @@
 /* Test __builtin_tgmath: errors that indicate a bad definition of a
    type-generic macro rather than bad arguments in a call to it.  */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 void *p;
 double d;
diff --git a/gcc/testsuite/gcc.dg/builtins-30.c b/gcc/testsuite/gcc.dg/builtins-30.c
index 37e5dba..d6552e5 100644
--- a/gcc/testsuite/gcc.dg/builtins-30.c
+++ b/gcc/testsuite/gcc.dg/builtins-30.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-Wall -Wshadow -fshow-column" } */
+/* { dg-options "-std=gnu17 -Wall -Wshadow -fshow-column" } */
 
 extern double strtod (const char *, char **);
 #define UNUSED __attribute__ ((unused))
diff --git a/gcc/testsuite/gcc.dg/cast-function-1.c b/gcc/testsuite/gcc.dg/cast-function-1.c
index 5228b55..4bd7136 100644
--- a/gcc/testsuite/gcc.dg/cast-function-1.c
+++ b/gcc/testsuite/gcc.dg/cast-function-1.c
@@ -6,7 +6,7 @@
    prototype than the actual one.  */
 
 /* { dg-do compile } */
-/* { dg-options "-O3" } */
+/* { dg-options "-std=gnu17 -O3" } */
 
 int foo1(int);
 int foo2();
diff --git a/gcc/testsuite/gcc.dg/cleanup-1.c b/gcc/testsuite/gcc.dg/cleanup-1.c
index c622a62..22d5900 100644
--- a/gcc/testsuite/gcc.dg/cleanup-1.c
+++ b/gcc/testsuite/gcc.dg/cleanup-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-fpermissive -Wall" } */
+/* { dg-options "-std=gnu17 -fpermissive -Wall" } */
 /* Validate expected warnings and errors.  */
 
 #define U	__attribute__((unused))
diff --git a/gcc/testsuite/gcc.dg/compat/struct-complex-1_x.c b/gcc/testsuite/gcc.dg/compat/struct-complex-1_x.c
index 0c67239..ff567a5 100644
--- a/gcc/testsuite/gcc.dg/compat/struct-complex-1_x.c
+++ b/gcc/testsuite/gcc.dg/compat/struct-complex-1_x.c
@@ -1,4 +1,4 @@
-/* { dg-options "-O -Wno-psabi" } */
+/* { dg-options "-std=gnu17 -O -Wno-psabi" } */
 
 
 #ifdef __x86_64__
diff --git a/gcc/testsuite/gcc.dg/compat/struct-complex-2_x.c b/gcc/testsuite/gcc.dg/compat/struct-complex-2_x.c
index 2fb9826..4ad5339 100644
--- a/gcc/testsuite/gcc.dg/compat/struct-complex-2_x.c
+++ b/gcc/testsuite/gcc.dg/compat/struct-complex-2_x.c
@@ -1,4 +1,4 @@
-/* { dg-options "-O -Wno-psabi" } */
+/* { dg-options "-std=gnu17 -O -Wno-psabi" } */
 
 
 #ifdef __x86_64__
diff --git a/gcc/testsuite/gcc.dg/compat/union-m128-1_x.c b/gcc/testsuite/gcc.dg/compat/union-m128-1_x.c
index 1f92303..13044bd 100644
--- a/gcc/testsuite/gcc.dg/compat/union-m128-1_x.c
+++ b/gcc/testsuite/gcc.dg/compat/union-m128-1_x.c
@@ -1,4 +1,4 @@
-/* { dg-options "-O -msse2" } */
+/* { dg-options "-std=gnu17 -O -msse2" } */
 
 #include "union-m128-1.h"
 
diff --git a/gcc/testsuite/gcc.dg/debug/dwarf2/pr66482.c b/gcc/testsuite/gcc.dg/debug/dwarf2/pr66482.c
index 880791c..81fac10 100644
--- a/gcc/testsuite/gcc.dg/debug/dwarf2/pr66482.c
+++ b/gcc/testsuite/gcc.dg/debug/dwarf2/pr66482.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O3 -gdwarf" } */
+/* { dg-options "-std=gnu17 -O3 -gdwarf" } */
 
 void f(int p) {}
 int g() {
diff --git a/gcc/testsuite/gcc.dg/dfp/composite-type-2.c b/gcc/testsuite/gcc.dg/dfp/composite-type-2.c
index 5c6d95c..3ae8a24 100644
--- a/gcc/testsuite/gcc.dg/dfp/composite-type-2.c
+++ b/gcc/testsuite/gcc.dg/dfp/composite-type-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O -Wall -ftrack-macro-expansion=0" } */
+/* { dg-options "-std=gnu17 -O -Wall -ftrack-macro-expansion=0" } */
 
 /* C99 6.2.7: Compatible type and composite type.  */
 
diff --git a/gcc/testsuite/gcc.dg/dfp/composite-type.c b/gcc/testsuite/gcc.dg/dfp/composite-type.c
index 2eb6014..ead3351 100644
--- a/gcc/testsuite/gcc.dg/dfp/composite-type.c
+++ b/gcc/testsuite/gcc.dg/dfp/composite-type.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-fpermissive -O -Wall -ftrack-macro-expansion=0" } */
+/* { dg-options "-std=gnu17 -fpermissive -O -Wall -ftrack-macro-expansion=0" } */
 
 /* C99 6.2.7: Compatible type and composite type.  */
 
diff --git a/gcc/testsuite/gcc.dg/dfp/keywords-pedantic.c b/gcc/testsuite/gcc.dg/dfp/keywords-pedantic.c
index bca5106..5740e02 100644
--- a/gcc/testsuite/gcc.dg/dfp/keywords-pedantic.c
+++ b/gcc/testsuite/gcc.dg/dfp/keywords-pedantic.c
@@ -1,7 +1,7 @@
 /* { dg-do compile } */
-/* { dg-options "-pedantic" } */
+/* { dg-options "-std=gnu17 -pedantic" } */
 
-/* Decimal float is a GCC extension.  */
+/* Decimal float is a GCC extension before C23.  */
 
 _Decimal32 x;		/* { dg-warning "GCC extension|ISO C" } */
 _Decimal64 y;		/* { dg-warning "GCC extension|ISO C" } */
diff --git a/gcc/testsuite/gcc.dg/dremf-type-compat-1.c b/gcc/testsuite/gcc.dg/dremf-type-compat-1.c
index 79c55ef..79e5d5b 100644
--- a/gcc/testsuite/gcc.dg/dremf-type-compat-1.c
+++ b/gcc/testsuite/gcc.dg/dremf-type-compat-1.c
@@ -4,7 +4,7 @@
    so it should be permitted when the function is built in.  Bug
    16666.  */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 float dremf (float, float);
 
diff --git a/gcc/testsuite/gcc.dg/dremf-type-compat-2.c b/gcc/testsuite/gcc.dg/dremf-type-compat-2.c
index 980ead1..ffb56a7 100644
--- a/gcc/testsuite/gcc.dg/dremf-type-compat-2.c
+++ b/gcc/testsuite/gcc.dg/dremf-type-compat-2.c
@@ -5,7 +5,7 @@
    16666.  Test with -pedantic, where the problem should still be
    diagnosed.  */
 /* { dg-do compile } */
-/* { dg-options "-pedantic" } */
+/* { dg-options "-std=gnu17 -pedantic" } */
 
 float dremf (float, float); /* { dg-warning "prototype declaration" } */
 
diff --git a/gcc/testsuite/gcc.dg/dremf-type-compat-3.c b/gcc/testsuite/gcc.dg/dremf-type-compat-3.c
index 3934a64..ef36e0b 100644
--- a/gcc/testsuite/gcc.dg/dremf-type-compat-3.c
+++ b/gcc/testsuite/gcc.dg/dremf-type-compat-3.c
@@ -5,7 +5,7 @@
    16666.  Test with -pedantic-errors, where the problem should still
    be diagnosed.  */
 /* { dg-do compile } */
-/* { dg-options "-pedantic-errors" } */
+/* { dg-options "-std=gnu17 -pedantic-errors" } */
 
 float dremf (float, float); /* { dg-error "prototype declaration" } */
 
diff --git a/gcc/testsuite/gcc.dg/dremf-type-compat-4.c b/gcc/testsuite/gcc.dg/dremf-type-compat-4.c
index b3a2c5a..27e2204 100644
--- a/gcc/testsuite/gcc.dg/dremf-type-compat-4.c
+++ b/gcc/testsuite/gcc.dg/dremf-type-compat-4.c
@@ -3,7 +3,7 @@
    of old-style parameter declarations should only apply when the
    prototype is visible, not for a built-in prototype.  */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 float
 dremf(x, y) /* { dg-warning "conflicting types for built-in function 'dremf'" } */
diff --git a/gcc/testsuite/gcc.dg/enum-compat-1.c b/gcc/testsuite/gcc.dg/enum-compat-1.c
index b7352f6..1589067 100644
--- a/gcc/testsuite/gcc.dg/enum-compat-1.c
+++ b/gcc/testsuite/gcc.dg/enum-compat-1.c
@@ -3,7 +3,7 @@
 /* Origin: Joseph Myers <jsm@polyomino.org.uk>, based on
    PR c/6024 from Richard Earnshaw <rearnsha@arm.com> */
 /* { dg-do compile } */
-/* { dg-options "-fpermissive" } */
+/* { dg-options "-std=gnu17 -fpermissive" } */
 
 /* Original test from PR c/6024.  */
 enum e1 {a, b};
diff --git a/gcc/testsuite/gcc.dg/enum-compat-2.c b/gcc/testsuite/gcc.dg/enum-compat-2.c
index 6950901..b42717e 100644
--- a/gcc/testsuite/gcc.dg/enum-compat-2.c
+++ b/gcc/testsuite/gcc.dg/enum-compat-2.c
@@ -3,7 +3,7 @@
 /* Origin: Joseph Myers <jsm@polyomino.org.uk>, based on
    PR c/6024 from Richard Earnshaw <rearnsha@arm.com> */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 /* Original test from PR c/6024.  */
 enum e1 {a, b};
diff --git a/gcc/testsuite/gcc.dg/floatn-errs.c b/gcc/testsuite/gcc.dg/floatn-errs.c
index 0dcc2f1..9fb3f90 100644
--- a/gcc/testsuite/gcc.dg/floatn-errs.c
+++ b/gcc/testsuite/gcc.dg/floatn-errs.c
@@ -1,6 +1,6 @@
 /* Tests for _FloatN / _FloatNx types: test erroneous code.  */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 /* { dg-add-options float32 } */
 /* { dg-add-options float64 } */
 /* { dg-add-options float32x } */
diff --git a/gcc/testsuite/gcc.dg/fltconst-pedantic-dfp.c b/gcc/testsuite/gcc.dg/fltconst-pedantic-dfp.c
index 6ff3091..b395fbd 100644
--- a/gcc/testsuite/gcc.dg/fltconst-pedantic-dfp.c
+++ b/gcc/testsuite/gcc.dg/fltconst-pedantic-dfp.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-pedantic" } */
+/* { dg-options "-std=gnu17 -pedantic" } */
 
 double a = 1.dl;	/* { dg-warning "decimal float" } */
 /* { dg-error "not supported for this target" "not supported" { target { ! dfp } } .-1 } */
diff --git a/gcc/testsuite/gcc.dg/format/proto.c b/gcc/testsuite/gcc.dg/format/proto.c
index b2050c9..2556400 100644
--- a/gcc/testsuite/gcc.dg/format/proto.c
+++ b/gcc/testsuite/gcc.dg/format/proto.c
@@ -4,7 +4,7 @@
    without a prototype.  If it's decided that it shouldn't be the tests
    here will need to be adjusted.
    { dg-do compile }
-   { dg-options "-Wall" } */
+   { dg-options "-std=gnu17 -Wall" } */
 
 #define FMT(n1, n2) __attribute__((__format__(__printf__, n1, n2)))
 
diff --git a/gcc/testsuite/gcc.dg/format/sentinel-1.c b/gcc/testsuite/gcc.dg/format/sentinel-1.c
index 16c75a8..d51289a 100644
--- a/gcc/testsuite/gcc.dg/format/sentinel-1.c
+++ b/gcc/testsuite/gcc.dg/format/sentinel-1.c
@@ -1,7 +1,7 @@
 /* Test for attribute sentinel.  */
 /* Origin: Kaveh Ghazi <ghazi@caip.rutgers.edu> */
 /* { dg-do compile } */
-/* { dg-options "-Wformat" } */
+/* { dg-options "-std=gnu17 -Wformat" } */
 
 #include <stddef.h> /* For NULL, which must be (ptr)0.  */
 
diff --git a/gcc/testsuite/gcc.dg/gomp/declare-simd-1.c b/gcc/testsuite/gcc.dg/gomp/declare-simd-1.c
index c8a99a8..8fa12e3 100644
--- a/gcc/testsuite/gcc.dg/gomp/declare-simd-1.c
+++ b/gcc/testsuite/gcc.dg/gomp/declare-simd-1.c
@@ -1,5 +1,6 @@
 /* Test parsing of #pragma omp declare simd */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-old-style-definition" } */
 
 #ifdef __aarch64__
 #pragma omp declare simd uniform (a) aligned (b : 2 * sizeof (int)) \
diff --git a/gcc/testsuite/gcc.dg/ifelse-1.c b/gcc/testsuite/gcc.dg/ifelse-1.c
index 2dd2208..cf111e2 100644
--- a/gcc/testsuite/gcc.dg/ifelse-1.c
+++ b/gcc/testsuite/gcc.dg/ifelse-1.c
@@ -1,6 +1,6 @@
 /*
 { dg-do compile }
-{ dg-options "-W -Wall" }
+{ dg-options "-Wno-old-style-definition -W -Wall" }
 */
 
 
diff --git a/gcc/testsuite/gcc.dg/inline-33.c b/gcc/testsuite/gcc.dg/inline-33.c
index 6ce3a53..a8a409d 100644
--- a/gcc/testsuite/gcc.dg/inline-33.c
+++ b/gcc/testsuite/gcc.dg/inline-33.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O3 -fdump-tree-optimized"  } */
+/* { dg-options "-std=gnu17 -O3 -fdump-tree-optimized"  } */
 /* { dg-add-options bind_pic_locally } */
 
 int i;
diff --git a/gcc/testsuite/gcc.dg/ipa/inline-5.c b/gcc/testsuite/gcc.dg/ipa/inline-5.c
index 390ba49..cef871c 100644
--- a/gcc/testsuite/gcc.dg/ipa/inline-5.c
+++ b/gcc/testsuite/gcc.dg/ipa/inline-5.c
@@ -1,6 +1,6 @@
 /* Check statements that are eliminated by inlining.  */
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-ipa-fnsummary-details -fno-early-inlining -fno-partial-inlining -fno-ipa-cp"  } */
+/* { dg-options "-std=gnu17 -O2 -fdump-ipa-fnsummary-details -fno-early-inlining -fno-partial-inlining -fno-ipa-cp"  } */
 
 struct a {int a,b,c,d,e;};
 void t(int);
diff --git a/gcc/testsuite/gcc.dg/ipa/ipa-sra-21.c b/gcc/testsuite/gcc.dg/ipa/ipa-sra-21.c
index 67806b8..17c1398 100644
--- a/gcc/testsuite/gcc.dg/ipa/ipa-sra-21.c
+++ b/gcc/testsuite/gcc.dg/ipa/ipa-sra-21.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2" } */
+/* { dg-options "-std=gnu17 -O2" } */
 
 typedef int a;
 typedef int b;
diff --git a/gcc/testsuite/gcc.dg/ipa/pr102714.c b/gcc/testsuite/gcc.dg/ipa/pr102714.c
index 8ab77a6..c93496d 100644
--- a/gcc/testsuite/gcc.dg/ipa/pr102714.c
+++ b/gcc/testsuite/gcc.dg/ipa/pr102714.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-strict-aliasing -fdump-ipa-sra-details -fdump-tree-optimized" } */
+/* { dg-options "-std=gnu17 -O2 -fno-strict-aliasing -fdump-ipa-sra-details -fdump-tree-optimized" } */
 
 typedef _Bool bool;
 
diff --git a/gcc/testsuite/gcc.dg/ipa/pr104813.c b/gcc/testsuite/gcc.dg/ipa/pr104813.c
index 34f413e..13e1e06 100644
--- a/gcc/testsuite/gcc.dg/ipa/pr104813.c
+++ b/gcc/testsuite/gcc.dg/ipa/pr104813.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O3"  } */
+/* { dg-options "-std=gnu17 -O3"  } */
 
 int a, b, c, d, *e;
 void f(int h) {
diff --git a/gcc/testsuite/gcc.dg/ipa/pr108679.c b/gcc/testsuite/gcc.dg/ipa/pr108679.c
index b1ed50b..714cdab 100644
--- a/gcc/testsuite/gcc.dg/ipa/pr108679.c
+++ b/gcc/testsuite/gcc.dg/ipa/pr108679.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2" } */
+/* { dg-options "-std=gnu17 -O2" } */
 
 struct S1 {
   signed f0;
diff --git a/gcc/testsuite/gcc.dg/ipa/pr42706.c b/gcc/testsuite/gcc.dg/ipa/pr42706.c
index 9c5f43a..0cb7d51 100644
--- a/gcc/testsuite/gcc.dg/ipa/pr42706.c
+++ b/gcc/testsuite/gcc.dg/ipa/pr42706.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-early-inlining -fipa-sra"  } */
+/* { dg-options "-std=gnu17 -O2 -fno-early-inlining -fipa-sra"  } */
 
 struct S
 {
diff --git a/gcc/testsuite/gcc.dg/ipa/pr88214.c b/gcc/testsuite/gcc.dg/ipa/pr88214.c
index 4daa982..c621796 100644
--- a/gcc/testsuite/gcc.dg/ipa/pr88214.c
+++ b/gcc/testsuite/gcc.dg/ipa/pr88214.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2" } */
+/* { dg-options "-Wno-old-style-definition -O2" } */
 
 void i();
   short a;
diff --git a/gcc/testsuite/gcc.dg/ipa/pr91853.c b/gcc/testsuite/gcc.dg/ipa/pr91853.c
index 4bad780..4460968 100644
--- a/gcc/testsuite/gcc.dg/ipa/pr91853.c
+++ b/gcc/testsuite/gcc.dg/ipa/pr91853.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "--param ipa-cp-value-list-size=0 -Os -fno-inline" } */
+/* { dg-options "-Wno-old-style-definition --param ipa-cp-value-list-size=0 -Os -fno-inline" } */
 
 struct _wincore
 {
diff --git a/gcc/testsuite/gcc.dg/ipa/pr93763.c b/gcc/testsuite/gcc.dg/ipa/pr93763.c
index aa2e60c..6aa4c6e 100644
--- a/gcc/testsuite/gcc.dg/ipa/pr93763.c
+++ b/gcc/testsuite/gcc.dg/ipa/pr93763.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O3" } */
+/* { dg-options "-std=gnu17 -O3" } */
 
 typedef struct a a;
 struct a {
diff --git a/gcc/testsuite/gcc.dg/ipa/pr96482-2.c b/gcc/testsuite/gcc.dg/ipa/pr96482-2.c
index 54b71ac..77c34e5 100644
--- a/gcc/testsuite/gcc.dg/ipa/pr96482-2.c
+++ b/gcc/testsuite/gcc.dg/ipa/pr96482-2.c
@@ -1,6 +1,6 @@
 /* PR ipa/96482 */
 /* { dg-do compile } */
-/* { dg-options "-O2"  } */
+/* { dg-options "-std=gnu17 -O2"  } */
 
 int i2c_transfer();
 void _dev_err();
diff --git a/gcc/testsuite/gcc.dg/lto/20091013-1_2.c b/gcc/testsuite/gcc.dg/lto/20091013-1_2.c
index 89caea8..283aedb 100644
--- a/gcc/testsuite/gcc.dg/lto/20091013-1_2.c
+++ b/gcc/testsuite/gcc.dg/lto/20091013-1_2.c
@@ -1,4 +1,4 @@
-/* { dg-options "-Wno-stringop-overread" } */
+/* { dg-options "-std=gnu17 -Wno-stringop-overread" } */
 
 typedef struct HDC__ { int unused; } *HDC;
 typedef struct HFONT__ { int unused; } *HFONT;
diff --git a/gcc/testsuite/gcc.dg/lto/20091015-1_2.c b/gcc/testsuite/gcc.dg/lto/20091015-1_2.c
index 0bc940b..6fb7002 100644
--- a/gcc/testsuite/gcc.dg/lto/20091015-1_2.c
+++ b/gcc/testsuite/gcc.dg/lto/20091015-1_2.c
@@ -1,3 +1,4 @@
+/* { dg-options "-std=gnu17" } */
 #include "20091015-1_a.h"
 #include "20091015-1_b.h"
 void foo ();
diff --git a/gcc/testsuite/gcc.dg/lto/pr113197_1.c b/gcc/testsuite/gcc.dg/lto/pr113197_1.c
index 30bf6f7..000f842 100644
--- a/gcc/testsuite/gcc.dg/lto/pr113197_1.c
+++ b/gcc/testsuite/gcc.dg/lto/pr113197_1.c
@@ -1,3 +1,4 @@
+/* { dg-options "-std=gnu17" } */
 int a;
 void exit_error();
 void register_dccp() { exit_error(a); }
diff --git a/gcc/testsuite/gcc.dg/lto/pr54702_1.c b/gcc/testsuite/gcc.dg/lto/pr54702_1.c
index c304682..7adc6a3 100644
--- a/gcc/testsuite/gcc.dg/lto/pr54702_1.c
+++ b/gcc/testsuite/gcc.dg/lto/pr54702_1.c
@@ -1,4 +1,4 @@
-/* { dg-options "-fpermissive" } */
+/* { dg-options "-std=gnu17 -fpermissive" } */
 int *b;
 void *d;
 int c;
diff --git a/gcc/testsuite/gcc.dg/lto/pr99849_0.c b/gcc/testsuite/gcc.dg/lto/pr99849_0.c
index d489cee..5c97a7c 100644
--- a/gcc/testsuite/gcc.dg/lto/pr99849_0.c
+++ b/gcc/testsuite/gcc.dg/lto/pr99849_0.c
@@ -3,7 +3,7 @@
 /* { dg-require-effective-target fpic } */
 /* { dg-require-effective-target shared } */
 /* { dg-extra-ld-options { -shared } } */
-/* { dg-lto-options { { -flto -flto-partition=1to1 -O2 -Wno-incompatible-pointer-types -Wno-discarded-qualifiers -fPIC } } } */
+/* { dg-lto-options { { -std=gnu17 -flto -flto-partition=1to1 -O2 -Wno-incompatible-pointer-types -Wno-discarded-qualifiers -fPIC } } } */
 
 struct { struct A *a; } *b;
 struct B { int *b; };
diff --git a/gcc/testsuite/gcc.dg/noncompile/920923-1.c b/gcc/testsuite/gcc.dg/noncompile/920923-1.c
index 006a071..957fea2 100644
--- a/gcc/testsuite/gcc.dg/noncompile/920923-1.c
+++ b/gcc/testsuite/gcc.dg/noncompile/920923-1.c
@@ -1,3 +1,4 @@
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-message "undeclared identifier is reported only once" "reminder for mmu_base" { target *-*-* } 0 } */
 typedef BYTE unsigned char;	/* { dg-error "expected" } */
 /* { dg-warning "useless type name in empty declaration" ""  { target *-*-* } .-1 } */
diff --git a/gcc/testsuite/gcc.dg/noncompile/old-style-parm-1.c b/gcc/testsuite/gcc.dg/noncompile/old-style-parm-1.c
index 5f879c3..cf14acd 100644
--- a/gcc/testsuite/gcc.dg/noncompile/old-style-parm-1.c
+++ b/gcc/testsuite/gcc.dg/noncompile/old-style-parm-1.c
@@ -2,7 +2,7 @@
    accepted.  */
 /* Origin: Joseph Myers <joseph@codesourcery.com> */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-Wno-old-style-definition" } */
 
 void
 f(a)
diff --git a/gcc/testsuite/gcc.dg/noncompile/old-style-parm-3.c b/gcc/testsuite/gcc.dg/noncompile/old-style-parm-3.c
index f9d6d0f..6c276ca 100644
--- a/gcc/testsuite/gcc.dg/noncompile/old-style-parm-3.c
+++ b/gcc/testsuite/gcc.dg/noncompile/old-style-parm-3.c
@@ -1,5 +1,6 @@
 /* PR c/71266 */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-old-style-definition" } */
 
 int fn1 (a)
   enum b {  /* { dg-warning "empty declaration" } */
diff --git a/gcc/testsuite/gcc.dg/noncompile/pr30552-2.c b/gcc/testsuite/gcc.dg/noncompile/pr30552-2.c
index d884883..8351f5d 100644
--- a/gcc/testsuite/gcc.dg/noncompile/pr30552-2.c
+++ b/gcc/testsuite/gcc.dg/noncompile/pr30552-2.c
@@ -5,7 +5,7 @@
  * internal compiler error.  */
 
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-Wno-old-style-definition" } */
 
 int main()
 {
diff --git a/gcc/testsuite/gcc.dg/noncompile/pr30552-3.c b/gcc/testsuite/gcc.dg/noncompile/pr30552-3.c
index 23cc7e6..0e747be 100644
--- a/gcc/testsuite/gcc.dg/noncompile/pr30552-3.c
+++ b/gcc/testsuite/gcc.dg/noncompile/pr30552-3.c
@@ -5,7 +5,7 @@
  * user error, not internal compiler error. */
 
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 int main()
 {
diff --git a/gcc/testsuite/gcc.dg/noncompile/pr71265.c b/gcc/testsuite/gcc.dg/noncompile/pr71265.c
index 9c62aab..69507b5 100644
--- a/gcc/testsuite/gcc.dg/noncompile/pr71265.c
+++ b/gcc/testsuite/gcc.dg/noncompile/pr71265.c
@@ -1,5 +1,6 @@
 /* PR c/71265 */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-old-style-definition" } */
 
 void ID (ID)
   int ID [__func__]; /* { dg-error "size of array .ID. has non-integer type" } */
diff --git a/gcc/testsuite/gcc.dg/noncompile/pr79758-2.c b/gcc/testsuite/gcc.dg/noncompile/pr79758-2.c
index e6a27f9..2e5323f 100644
--- a/gcc/testsuite/gcc.dg/noncompile/pr79758-2.c
+++ b/gcc/testsuite/gcc.dg/noncompile/pr79758-2.c
@@ -1,5 +1,6 @@
 /* PR c/79758 */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-old-style-definition" } */
 
 void fn1 (int[a]) { }; /* { dg-error "undeclared here" } */
 void fn1 (b) { }; /* { dg-error "redefinition" } */
diff --git a/gcc/testsuite/gcc.dg/noncompile/pr79758.c b/gcc/testsuite/gcc.dg/noncompile/pr79758.c
index e42a443..eab4925 100644
--- a/gcc/testsuite/gcc.dg/noncompile/pr79758.c
+++ b/gcc/testsuite/gcc.dg/noncompile/pr79758.c
@@ -1,6 +1,6 @@
 /* PR c/79758 */
 /* { dg-do compile } */
-/* { dg-additional-options "-fpermissive" } */
+/* { dg-additional-options "-Wno-old-style-definition -fpermissive" } */
 
 void fn1 (int[a]) { }; /* { dg-error "undeclared here" } */
 void fn1 (b) { }; /* { dg-error "redefinition" } */
diff --git a/gcc/testsuite/gcc.dg/noncompile/va-arg-1.c b/gcc/testsuite/gcc.dg/noncompile/va-arg-1.c
index f36a492..3a33536 100644
--- a/gcc/testsuite/gcc.dg/noncompile/va-arg-1.c
+++ b/gcc/testsuite/gcc.dg/noncompile/va-arg-1.c
@@ -1,3 +1,5 @@
+/* { dg-additional-options "-std=gnu17" } */
+
 #include <stdarg.h>
 
 void
diff --git a/gcc/testsuite/gcc.dg/old-style-prom-1.c b/gcc/testsuite/gcc.dg/old-style-prom-1.c
index 165ff98..f9b4139 100644
--- a/gcc/testsuite/gcc.dg/old-style-prom-1.c
+++ b/gcc/testsuite/gcc.dg/old-style-prom-1.c
@@ -1,7 +1,7 @@
 /* Test for prototype followed by old-style definition, as in
    dremf-type-compat-1.c but with a non-built-in function.  */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 float f (float, float);
 
diff --git a/gcc/testsuite/gcc.dg/old-style-prom-2.c b/gcc/testsuite/gcc.dg/old-style-prom-2.c
index e7e690e..4a1283b 100644
--- a/gcc/testsuite/gcc.dg/old-style-prom-2.c
+++ b/gcc/testsuite/gcc.dg/old-style-prom-2.c
@@ -1,7 +1,7 @@
 /* Test for prototype followed by old-style definition, as in
    dremf-type-compat-2.c but with a non-built-in function.  */
 /* { dg-do compile } */
-/* { dg-options "-pedantic" } */
+/* { dg-options "-std=gnu17 -pedantic" } */
 
 float f (float, float); /* { dg-warning "prototype declaration" } */
 
diff --git a/gcc/testsuite/gcc.dg/old-style-prom-3.c b/gcc/testsuite/gcc.dg/old-style-prom-3.c
index 720367f..e84b39b 100644
--- a/gcc/testsuite/gcc.dg/old-style-prom-3.c
+++ b/gcc/testsuite/gcc.dg/old-style-prom-3.c
@@ -1,7 +1,7 @@
 /* Test for prototype followed by old-style definition, as in
    dremf-type-compat-3.c but with a non-built-in function.  */
 /* { dg-do compile } */
-/* { dg-options "-pedantic-errors" } */
+/* { dg-options "-std=gnu17 -pedantic-errors" } */
 
 float f (float, float); /* { dg-error "prototype declaration" } */
 
diff --git a/gcc/testsuite/gcc.dg/old-style-then-proto-1.c b/gcc/testsuite/gcc.dg/old-style-then-proto-1.c
index e3e6186..d09e76e 100644
--- a/gcc/testsuite/gcc.dg/old-style-then-proto-1.c
+++ b/gcc/testsuite/gcc.dg/old-style-then-proto-1.c
@@ -2,7 +2,7 @@
    Mismatched qualifiers used to be wrongly forbidden.  */
 /* Origin: Joseph Myers <joseph@codesourcery.com> */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 void f1() {}
 void f1(void); /* { dg-warning "prototype for 'f1' follows non-prototype definition" } */
diff --git a/gcc/testsuite/gcc.dg/parm-incomplete-1.c b/gcc/testsuite/gcc.dg/parm-incomplete-1.c
index 02d97b9..0c0ae85 100644
--- a/gcc/testsuite/gcc.dg/parm-incomplete-1.c
+++ b/gcc/testsuite/gcc.dg/parm-incomplete-1.c
@@ -6,7 +6,7 @@
    C99 6.7.5.3); the precise rules are unclear.  */
 /* Origin: Joseph Myers <jsm@polyomino.org.uk> */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 struct s;
 void f (struct s);
diff --git a/gcc/testsuite/gcc.dg/parm-mismatch-1.c b/gcc/testsuite/gcc.dg/parm-mismatch-1.c
index d7621bc..2136f72 100644
--- a/gcc/testsuite/gcc.dg/parm-mismatch-1.c
+++ b/gcc/testsuite/gcc.dg/parm-mismatch-1.c
@@ -2,7 +2,7 @@
    ().  */
 /* Origin: Joseph Myers <joseph@codesourcery.com> */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 void f0(); /* { dg-message "note: previous declaration of 'f0'" "note" } */
 void f0(int, ...); /* { dg-error "conflicting types for 'f0'" } */
diff --git a/gcc/testsuite/gcc.dg/permerror-default.c b/gcc/testsuite/gcc.dg/permerror-default.c
index c674d68..b321a7d 100644
--- a/gcc/testsuite/gcc.dg/permerror-default.c
+++ b/gcc/testsuite/gcc.dg/permerror-default.c
@@ -1,4 +1,4 @@
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 /* Overview test for C permerrors.  This test should be kept in sync with the
    other permerror-* tests.  If new permerrors are added, test cases should be
diff --git a/gcc/testsuite/gcc.dg/permerror-fpermissive-nowarning.c b/gcc/testsuite/gcc.dg/permerror-fpermissive-nowarning.c
index d07c863..19629fc 100644
--- a/gcc/testsuite/gcc.dg/permerror-fpermissive-nowarning.c
+++ b/gcc/testsuite/gcc.dg/permerror-fpermissive-nowarning.c
@@ -1,4 +1,4 @@
-/* { dg-options "-fpermissive -Wno-implicit-function-declaration -Wno-implicit-int -Wno-int-conversion -Wno-incompatible-pointer-types -Wno-return-mismatch -Wno-declaration-missing-parameter-type" } */
+/* { dg-options "-std=gnu17 -fpermissive -Wno-implicit-function-declaration -Wno-implicit-int -Wno-int-conversion -Wno-incompatible-pointer-types -Wno-return-mismatch -Wno-declaration-missing-parameter-type" } */
 
 /* This test checks that permerrors can be disabled using -Wno-* options even
    if -fpermissive is used.  */
diff --git a/gcc/testsuite/gcc.dg/permerror-fpermissive.c b/gcc/testsuite/gcc.dg/permerror-fpermissive.c
index fd3020d..46a8200 100644
--- a/gcc/testsuite/gcc.dg/permerror-fpermissive.c
+++ b/gcc/testsuite/gcc.dg/permerror-fpermissive.c
@@ -1,4 +1,4 @@
-/* { dg-options "-fpermissive" } */
+/* { dg-options "-std=gnu17 -fpermissive" } */
 
 /* Overview test for C permerrors.  This test should be kept in sync with the
    other permerror-* tests.  If new permerrors are added, test cases should be
diff --git a/gcc/testsuite/gcc.dg/permerror-noerror.c b/gcc/testsuite/gcc.dg/permerror-noerror.c
index fc68dfa..614fb06 100644
--- a/gcc/testsuite/gcc.dg/permerror-noerror.c
+++ b/gcc/testsuite/gcc.dg/permerror-noerror.c
@@ -1,4 +1,4 @@
-/* { dg-options "-Wno-error=implicit-function-declaration -Wno-error=implicit-int -Wno-error=int-conversion -Wno-error=incompatible-pointer-types -Wno-error=return-mismatch -Wno-error=declaration-missing-parameter-type" } */
+/* { dg-options "-std=gnu17 -Wno-error=implicit-function-declaration -Wno-error=implicit-int -Wno-error=int-conversion -Wno-error=incompatible-pointer-types -Wno-error=return-mismatch -Wno-error=declaration-missing-parameter-type" } */
 
 /* This test should emulate the effect of -fpermissive by adding all the
    -Wno-error= options that are implied by -fpermissive.  It needs to be
diff --git a/gcc/testsuite/gcc.dg/permerror-nowarning.c b/gcc/testsuite/gcc.dg/permerror-nowarning.c
index b1cf799..3182a24 100644
--- a/gcc/testsuite/gcc.dg/permerror-nowarning.c
+++ b/gcc/testsuite/gcc.dg/permerror-nowarning.c
@@ -1,4 +1,4 @@
-/* { dg-options "-Wno-implicit-function-declaration -Wno-implicit-int -Wno-int-conversion -Wno-incompatible-pointer-types -Wno-return-mismatch -Wno-declaration-missing-parameter-type" } */
+/* { dg-options "-std=gnu17 -Wno-implicit-function-declaration -Wno-implicit-int -Wno-int-conversion -Wno-incompatible-pointer-types -Wno-return-mismatch -Wno-declaration-missing-parameter-type" } */
 
 /* This test checks that permerrors can be disabled using -Wno-* options.  */
 
diff --git a/gcc/testsuite/gcc.dg/permerror-pedantic.c b/gcc/testsuite/gcc.dg/permerror-pedantic.c
index 2380bb2..11fa83a 100644
--- a/gcc/testsuite/gcc.dg/permerror-pedantic.c
+++ b/gcc/testsuite/gcc.dg/permerror-pedantic.c
@@ -1,4 +1,4 @@
-/* { dg-options "-pedantic-errors" } */
+/* { dg-options "-std=gnu17 -pedantic-errors" } */
 
 /* Overview test for C permerrors.  This test should be kept in sync with the
    other permerror-* tests.  If new permerrors are added, test cases should be
diff --git a/gcc/testsuite/gcc.dg/plugin/infoleak-net-ethtool-ioctl.c b/gcc/testsuite/gcc.dg/plugin/infoleak-net-ethtool-ioctl.c
index dce6e44..52846c4 100644
--- a/gcc/testsuite/gcc.dg/plugin/infoleak-net-ethtool-ioctl.c
+++ b/gcc/testsuite/gcc.dg/plugin/infoleak-net-ethtool-ioctl.c
@@ -2,7 +2,7 @@
    net/ethtool/ioctl.c  */
 
 /* { dg-do compile } */
-/* { dg-options "-fanalyzer" } */
+/* { dg-options "-std=gnu17 -fanalyzer" } */
 /* { dg-require-effective-target analyzer } */
 
 typedef signed char __s8;
diff --git a/gcc/testsuite/gcc.dg/pointer-array-quals-1.c b/gcc/testsuite/gcc.dg/pointer-array-quals-1.c
index be80912..36398ef 100644
--- a/gcc/testsuite/gcc.dg/pointer-array-quals-1.c
+++ b/gcc/testsuite/gcc.dg/pointer-array-quals-1.c
@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* Origin: Martin Uecker <uecker@eecs.berkeley.edu> */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 void tvoid(void* x);
 void transpose0(double* out, const double* in) { }
 void transpose1(double out[2][2], const double in[2][2]) { }
diff --git a/gcc/testsuite/gcc.dg/pointer-array-quals-2.c b/gcc/testsuite/gcc.dg/pointer-array-quals-2.c
index 4c95d8a..32adf79 100644
--- a/gcc/testsuite/gcc.dg/pointer-array-quals-2.c
+++ b/gcc/testsuite/gcc.dg/pointer-array-quals-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-pedantic-errors" } */
+/* { dg-options "-std=gnu17 -pedantic-errors" } */
 /* Origin: Martin Uecker <uecker@eecs.berkeley.edu> */
 void tvoid(void* x);
 void transpose0(double* out, const double* in) { }
diff --git a/gcc/testsuite/gcc.dg/pr100791.c b/gcc/testsuite/gcc.dg/pr100791.c
index 00cc4b1..f0e7da5 100644
--- a/gcc/testsuite/gcc.dg/pr100791.c
+++ b/gcc/testsuite/gcc.dg/pr100791.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-fpermissive" } */
+/* { dg-options "-std=gnu17 -fpermissive" } */
 
 static inline int __attribute__((__always_inline__))
 foo ()
diff --git a/gcc/testsuite/gcc.dg/pr100843.c b/gcc/testsuite/gcc.dg/pr100843.c
index 695a2ec..a8ecb5a 100644
--- a/gcc/testsuite/gcc.dg/pr100843.c
+++ b/gcc/testsuite/gcc.dg/pr100843.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O1 -w" } */
+/* { dg-options "-std=gnu17 -O1 -w" } */
 
 char c;
 void *memset();
diff --git a/gcc/testsuite/gcc.dg/pr102273.c b/gcc/testsuite/gcc.dg/pr102273.c
index 568e44e..2cb396e 100644
--- a/gcc/testsuite/gcc.dg/pr102273.c
+++ b/gcc/testsuite/gcc.dg/pr102273.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-ftrivial-auto-var-init=zero" } */
+/* { dg-options "-std=gnu17 -ftrivial-auto-var-init=zero" } */
 
 void bar();
 
diff --git a/gcc/testsuite/gcc.dg/pr102385.c b/gcc/testsuite/gcc.dg/pr102385.c
index bdccc9e..f64017e 100644
--- a/gcc/testsuite/gcc.dg/pr102385.c
+++ b/gcc/testsuite/gcc.dg/pr102385.c
@@ -1,4 +1,4 @@
-/* { dg-options "-Wall -Wextra -O2 -fno-toplevel-reorder -fno-tree-ch -fno-tree-dce -fno-tree-dominator-opts -fno-tree-dse -fno-tree-loop-ivcanon -fpredictive-commoning -fdump-tree-pcom-details-blocks -fdump-tree-lim-details-blocks" } */
+/* { dg-options "-std=gnu17 -Wall -Wextra -O2 -fno-toplevel-reorder -fno-tree-ch -fno-tree-dce -fno-tree-dominator-opts -fno-tree-dse -fno-tree-loop-ivcanon -fpredictive-commoning -fdump-tree-pcom-details-blocks -fdump-tree-lim-details-blocks" } */
 
 short a, b;
 int c[9];
diff --git a/gcc/testsuite/gcc.dg/pr103222.c b/gcc/testsuite/gcc.dg/pr103222.c
index 2a84437..9b629f2 100644
--- a/gcc/testsuite/gcc.dg/pr103222.c
+++ b/gcc/testsuite/gcc.dg/pr103222.c
@@ -1,5 +1,5 @@
 // { dg-do run }
-// { dg-options "-O2" }
+// { dg-options "-std=gnu17 -O2" }
 
 #include <stdint.h>
 #include <stdio.h>
diff --git a/gcc/testsuite/gcc.dg/pr105140.c b/gcc/testsuite/gcc.dg/pr105140.c
index 173dc8c..32267f0 100644
--- a/gcc/testsuite/gcc.dg/pr105140.c
+++ b/gcc/testsuite/gcc.dg/pr105140.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-fpermissive -Os -w -Wno-psabi" } */
+/* { dg-options "-std=gnu17 -fpermissive -Os -w -Wno-psabi" } */
 /* { dg-skip-if "PR105147" { powerpc*-*-* s390*-*-* } } */
 
 typedef char __attribute__((__vector_size__ (16 * sizeof (char)))) U;
diff --git a/gcc/testsuite/gcc.dg/pr105150.c b/gcc/testsuite/gcc.dg/pr105150.c
index 900460c..b8c35c0 100644
--- a/gcc/testsuite/gcc.dg/pr105150.c
+++ b/gcc/testsuite/gcc.dg/pr105150.c
@@ -1,5 +1,5 @@
 /* PR tree-optimization/105150 */
-/* { dg-options "-w -Ofast" } */
+/* { dg-options "-std=gnu17 -w -Ofast" } */
 
 #define A(name) __typeof (__builtin_##name (0)) name (); \
   float name##1 () { return !name (1); } \
diff --git a/gcc/testsuite/gcc.dg/pr105250.c b/gcc/testsuite/gcc.dg/pr105250.c
index c4f4ea0..ba3b0dd 100644
--- a/gcc/testsuite/gcc.dg/pr105250.c
+++ b/gcc/testsuite/gcc.dg/pr105250.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-fpermissive -w -Wno-psabi -O2" } */
+/* { dg-options "-std=gnu17 -fpermissive -w -Wno-psabi -O2" } */
 /* { dg-skip-if "PR105266" { powerpc*-*-* s390*-*-* } } */
 
 typedef int __attribute__((__vector_size__(4))) T;
diff --git a/gcc/testsuite/gcc.dg/pr105972.c b/gcc/testsuite/gcc.dg/pr105972.c
index 73f3385..93518f6 100644
--- a/gcc/testsuite/gcc.dg/pr105972.c
+++ b/gcc/testsuite/gcc.dg/pr105972.c
@@ -1,6 +1,6 @@
 /* PR c/105972 */
 /* { dg-do compile } */
-/* { dg-options "-O2 -g" } */
+/* { dg-options "-Wno-old-style-definition -O2 -g" } */
 
 __attribute__((optimize (0))) int
 foo (void)
diff --git a/gcc/testsuite/gcc.dg/pr111039.c b/gcc/testsuite/gcc.dg/pr111039.c
index a64c46c..0ba142b 100644
--- a/gcc/testsuite/gcc.dg/pr111039.c
+++ b/gcc/testsuite/gcc.dg/pr111039.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O" } */
+/* { dg-options "-std=gnu17 -O" } */
 
 #if __SIZEOF_INT__ < 4
 #define int __INT32_TYPE__
diff --git a/gcc/testsuite/gcc.dg/pr111407.c b/gcc/testsuite/gcc.dg/pr111407.c
index a171074..211e19f 100644
--- a/gcc/testsuite/gcc.dg/pr111407.c
+++ b/gcc/testsuite/gcc.dg/pr111407.c
@@ -1,6 +1,6 @@
 /* PR tree-optimization/111407*/
 /* { dg-do compile } */
-/* { dg-options "-O2" } */
+/* { dg-options "-std=gnu17 -O2" } */
 enum { SEND_TOFILE } __sigsetjmp();
 void fclose();
 void foldergets();
diff --git a/gcc/testsuite/gcc.dg/pr111922.c b/gcc/testsuite/gcc.dg/pr111922.c
index 4f429d7..7201c0e 100644
--- a/gcc/testsuite/gcc.dg/pr111922.c
+++ b/gcc/testsuite/gcc.dg/pr111922.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-tree-fre" } */
+/* { dg-options "-Wno-old-style-definition -O2 -fno-tree-fre" } */
 
 void f2 (void);
 void f4 (int, int, int);
diff --git a/gcc/testsuite/gcc.dg/pr15236.c b/gcc/testsuite/gcc.dg/pr15236.c
index b01a4e8..9b92489 100644
--- a/gcc/testsuite/gcc.dg/pr15236.c
+++ b/gcc/testsuite/gcc.dg/pr15236.c
@@ -1,7 +1,7 @@
 /* PR 15236: pedantic switch modifies treatment of non-ISO compliant
    enumerations.  */
 /* { dg-do compile } */
-/* { dg-options "-Wall -Wextra -pedantic-errors -Wconversion" } */
+/* { dg-options "-std=gnu17 -Wall -Wextra -pedantic-errors -Wconversion" } */
 typedef enum OMX_ERRORTYPE
 {
   OMX_ErrorNone = 0,
diff --git a/gcc/testsuite/gcc.dg/pr17188-1.c b/gcc/testsuite/gcc.dg/pr17188-1.c
index 522a14f..142f42a 100644
--- a/gcc/testsuite/gcc.dg/pr17188-1.c
+++ b/gcc/testsuite/gcc.dg/pr17188-1.c
@@ -3,7 +3,7 @@
    diagnosed.  Bug 17188.  */
 /* Origin: Joseph Myers <jsm@polyomino.org.uk> */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 struct s0 { }; /* { dg-message "note: originally defined here" } */
 struct s0;
diff --git a/gcc/testsuite/gcc.dg/pr20368-1.c b/gcc/testsuite/gcc.dg/pr20368-1.c
index 4140397..2959328 100644
--- a/gcc/testsuite/gcc.dg/pr20368-1.c
+++ b/gcc/testsuite/gcc.dg/pr20368-1.c
@@ -1,7 +1,7 @@
 /* ICE with -Wstrict-prototypes and typeof an undeclared function.
    Bug 20368.  */
 /* { dg-do compile } */
-/* { dg-options "-Wstrict-prototypes" } */
+/* { dg-options "-std=gnu17 -Wstrict-prototypes" } */
 
 extern __typeof (f) g; /* { dg-error "'f' undeclared here \\(not in a function\\)" } */
 
diff --git a/gcc/testsuite/gcc.dg/pr20368-2.c b/gcc/testsuite/gcc.dg/pr20368-2.c
index 7faded6..3ca5f63 100644
--- a/gcc/testsuite/gcc.dg/pr20368-2.c
+++ b/gcc/testsuite/gcc.dg/pr20368-2.c
@@ -1,7 +1,7 @@
 /* ICE with -Wstrict-prototypes and typeof an undeclared function.
    Bug 20368.  Test with -Wmissing-prototypes.  */
 /* { dg-do compile } */
-/* { dg-options "-Wmissing-prototypes" } */
+/* { dg-options "-std=gnu17 -Wmissing-prototypes" } */
 
 extern __typeof (f) g; /* { dg-error "'f' undeclared here \\(not in a function\\)" } */
 
diff --git a/gcc/testsuite/gcc.dg/pr20368-3.c b/gcc/testsuite/gcc.dg/pr20368-3.c
index 0d0ea6d..e3b5194 100644
--- a/gcc/testsuite/gcc.dg/pr20368-3.c
+++ b/gcc/testsuite/gcc.dg/pr20368-3.c
@@ -1,7 +1,7 @@
 /* ICE with -Wstrict-prototypes and typeof an undeclared function.
    Bug 20368.  Test with -Wmissing-declarations.  */
 /* { dg-do compile } */
-/* { dg-options "-Wmissing-declarations" } */
+/* { dg-options "-std=gnu17 -Wmissing-declarations" } */
 
 extern __typeof (f) g; /* { dg-error "'f' undeclared here \\(not in a function\\)" } */
 
diff --git a/gcc/testsuite/gcc.dg/pr27331.c b/gcc/testsuite/gcc.dg/pr27331.c
index 9b5c71e..50ec9a1 100644
--- a/gcc/testsuite/gcc.dg/pr27331.c
+++ b/gcc/testsuite/gcc.dg/pr27331.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -ftree-vectorize" } */
+/* { dg-options "-Wno-old-style-definition -O2 -ftree-vectorize" } */
 
 struct funny_match
 {
diff --git a/gcc/testsuite/gcc.dg/pr27861-1.c b/gcc/testsuite/gcc.dg/pr27861-1.c
index 8d6d791..e8f86f2 100644
--- a/gcc/testsuite/gcc.dg/pr27861-1.c
+++ b/gcc/testsuite/gcc.dg/pr27861-1.c
@@ -4,7 +4,7 @@
    later producing a VAR_DECL tree whose DECL_RTL's mode didn't match
    the VAR_DECL's type's mode.  */
 /* { dg-do compile } */
-/* { dg-options "-O2" } */
+/* { dg-options "-std=gnu17 -O2" } */
 
 typedef struct sim_state *SIM_DESC;
 typedef enum
diff --git a/gcc/testsuite/gcc.dg/pr28121.c b/gcc/testsuite/gcc.dg/pr28121.c
index 9e306f5..93d065f 100644
--- a/gcc/testsuite/gcc.dg/pr28121.c
+++ b/gcc/testsuite/gcc.dg/pr28121.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2" } */
+/* { dg-options "-std=gnu17 -O2" } */
 
 int GetMouseButton ();
 int ParsePos ();
diff --git a/gcc/testsuite/gcc.dg/pr28243.c b/gcc/testsuite/gcc.dg/pr28243.c
index a6d693e..fd08b99 100644
--- a/gcc/testsuite/gcc.dg/pr28243.c
+++ b/gcc/testsuite/gcc.dg/pr28243.c
@@ -3,7 +3,7 @@
 
 /* { dg-do compile } */
 /* { dg-require-effective-target fpic } */
-/* { dg-options "-O2 -ftracer -fPIC" } */
+/* { dg-options "-std=gnu17 -O2 -ftracer -fPIC" } */
 
 struct displayfuncs {
   void (*init) ();
diff --git a/gcc/testsuite/gcc.dg/pr28888.c b/gcc/testsuite/gcc.dg/pr28888.c
index 3bad18b..dea52f1 100644
--- a/gcc/testsuite/gcc.dg/pr28888.c
+++ b/gcc/testsuite/gcc.dg/pr28888.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -ftree-vectorize" } */
+/* { dg-options "-std=gnu17 -O2 -ftree-vectorize" } */
 
 static const unsigned char _c30[] =
   "statistic of allocated integer registers:";
diff --git a/gcc/testsuite/gcc.dg/pr29254.c b/gcc/testsuite/gcc.dg/pr29254.c
index df6ba57..1770a97 100644
--- a/gcc/testsuite/gcc.dg/pr29254.c
+++ b/gcc/testsuite/gcc.dg/pr29254.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O3 -Werror" } */
+/* { dg-options "-std=gnu17 -O3 -Werror" } */
 
 int value_compare ();
 
diff --git a/gcc/testsuite/gcc.dg/pr34457-1.c b/gcc/testsuite/gcc.dg/pr34457-1.c
index 3dca13d..ef2419f 100644
--- a/gcc/testsuite/gcc.dg/pr34457-1.c
+++ b/gcc/testsuite/gcc.dg/pr34457-1.c
@@ -2,7 +2,7 @@
 /* { dg-do link } */
 /* { dg-require-effective-target trampolines } */
 /* { dg-require-effective-target lto } */
-/* { dg-options "-flto -O2" } */
+/* { dg-options "-std=gnu17 -flto -O2" } */
 /* { dg-additional-sources "pr34457-2.c" } */
    
 
diff --git a/gcc/testsuite/gcc.dg/pr36015.c b/gcc/testsuite/gcc.dg/pr36015.c
index fc31535..85b441c 100644
--- a/gcc/testsuite/gcc.dg/pr36015.c
+++ b/gcc/testsuite/gcc.dg/pr36015.c
@@ -1,7 +1,7 @@
 /* PR target/36015 */
 /* { dg-do run } */
-/* { dg-options "-O0" } */
-/* { dg-options "-O0 -mregparm=3" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
+/* { dg-options "-std=gnu17 -O0" } */
+/* { dg-options "-std=gnu17 -O0 -mregparm=3" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
 
 static int test ();
 
diff --git a/gcc/testsuite/gcc.dg/pr38245-3.c b/gcc/testsuite/gcc.dg/pr38245-3.c
index 6ef8372..ae687c6 100644
--- a/gcc/testsuite/gcc.dg/pr38245-3.c
+++ b/gcc/testsuite/gcc.dg/pr38245-3.c
@@ -1,7 +1,7 @@
 /* PR rtl-optimization/38245 */
 /* { dg-do run } */
 /* { dg-additional-sources "pr38245-4.c" } */
-/* { dg-options "-O2" } */
+/* { dg-options "-std=gnu17 -O2" } */
 
 #include "pr38245-3.h"
 
diff --git a/gcc/testsuite/gcc.dg/pr38245-4.c b/gcc/testsuite/gcc.dg/pr38245-4.c
index c9b3d2d..7b63b98 100644
--- a/gcc/testsuite/gcc.dg/pr38245-4.c
+++ b/gcc/testsuite/gcc.dg/pr38245-4.c
@@ -1,6 +1,6 @@
 /* PR rtl-optimization/38245 */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 #include "pr38245-3.h"
 
diff --git a/gcc/testsuite/gcc.dg/pr41241.c b/gcc/testsuite/gcc.dg/pr41241.c
index 42fb2f7..5364a0a 100644
--- a/gcc/testsuite/gcc.dg/pr41241.c
+++ b/gcc/testsuite/gcc.dg/pr41241.c
@@ -1,7 +1,7 @@
 /* PR bootstrap/41241 */
 /* { dg-do compile } */
-/* { dg-options "-O2 -fcompare-debug -g" } */
-/* { dg-options "-O2 -fcompare-debug -g -march=i586 -mtune=i586 -fomit-frame-pointer" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
+/* { dg-options "-std=gnu17 -O2 -fcompare-debug -g" } */
+/* { dg-options "-std=gnu17 -O2 -fcompare-debug -g -march=i586 -mtune=i586 -fomit-frame-pointer" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
 
 typedef struct { int t1; int t2; int t3; } *T;
 typedef struct { int s; } S;
diff --git a/gcc/testsuite/gcc.dg/pr43058.c b/gcc/testsuite/gcc.dg/pr43058.c
index bba6f81..c1ba39c 100644
--- a/gcc/testsuite/gcc.dg/pr43058.c
+++ b/gcc/testsuite/gcc.dg/pr43058.c
@@ -1,6 +1,6 @@
 /* PR debug/43058 */
 /* { dg-do compile } */
-/* { dg-options "-g -O2" } */
+/* { dg-options "-std=gnu17 -g -O2" } */
 /* { dg-timeout-factor 4 } */
 
 extern void *f1 (void *, void *, void *);
diff --git a/gcc/testsuite/gcc.dg/pr44539.c b/gcc/testsuite/gcc.dg/pr44539.c
index 9cfff7a..cb9a631 100644
--- a/gcc/testsuite/gcc.dg/pr44539.c
+++ b/gcc/testsuite/gcc.dg/pr44539.c
@@ -1,6 +1,6 @@
 /* PR tree-optimization/44539 */
 /* { dg-do compile } */
-/* { dg-options "-ftracer -freorder-blocks -O2" } */
+/* { dg-options "-std=gnu17 -ftracer -freorder-blocks -O2" } */
 
 void bar (int file);
 extern int baz (void);
diff --git a/gcc/testsuite/gcc.dg/pr45055.c b/gcc/testsuite/gcc.dg/pr45055.c
index 899de50..305f823 100644
--- a/gcc/testsuite/gcc.dg/pr45055.c
+++ b/gcc/testsuite/gcc.dg/pr45055.c
@@ -1,6 +1,6 @@
 /* PR debug/45055 */
 /* { dg-do compile } */
-/* { dg-options "-O2 -ftracer -fsched-pressure -funroll-loops -fschedule-insns -fcompare-debug" } */
+/* { dg-options "-std=gnu17 -O2 -ftracer -fsched-pressure -funroll-loops -fschedule-insns -fcompare-debug" } */
 /* { dg-require-effective-target scheduling } */
 
 int colormap[10];
diff --git a/gcc/testsuite/gcc.dg/pr50908.c b/gcc/testsuite/gcc.dg/pr50908.c
index 114dded..3083a52 100644
--- a/gcc/testsuite/gcc.dg/pr50908.c
+++ b/gcc/testsuite/gcc.dg/pr50908.c
@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target lp64 } */
-/* { dg-options "-O2 -ftree-tail-merge" } */
+/* { dg-options "-Wno-old-style-definition -O2 -ftree-tail-merge" } */
 
 enum Lisp_Type
 {
diff --git a/gcc/testsuite/gcc.dg/pr60647-1.c b/gcc/testsuite/gcc.dg/pr60647-1.c
index 99f5919..e5d77f2 100644
--- a/gcc/testsuite/gcc.dg/pr60647-1.c
+++ b/gcc/testsuite/gcc.dg/pr60647-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2" } */
+/* { dg-options "-Wno-old-style-definition -O2" } */
 
 struct _wincore
 {
diff --git a/gcc/testsuite/gcc.dg/pr63762.c b/gcc/testsuite/gcc.dg/pr63762.c
index df11067..8de8e63 100644
--- a/gcc/testsuite/gcc.dg/pr63762.c
+++ b/gcc/testsuite/gcc.dg/pr63762.c
@@ -1,6 +1,6 @@
 /* PR middle-end/63762 */
 /* { dg-do assemble } */
-/* { dg-options "-O2" } */
+/* { dg-options "-std=gnu17 -O2" } */
 
 #include <stdlib.h>
 
diff --git a/gcc/testsuite/gcc.dg/pr63804.c b/gcc/testsuite/gcc.dg/pr63804.c
index f0a02f2..f92822a 100644
--- a/gcc/testsuite/gcc.dg/pr63804.c
+++ b/gcc/testsuite/gcc.dg/pr63804.c
@@ -1,6 +1,6 @@
 /* PR rtl-optimization/63804 */
 /* { dg-do compile } */
-/* { dg-options "-O2 -g" } */
+/* { dg-options "-std=gnu17 -O2 -g" } */
 
 struct A { int gen; } e;
 int a, d;
diff --git a/gcc/testsuite/gcc.dg/pr68306-3.c b/gcc/testsuite/gcc.dg/pr68306-3.c
index f5a8c10..cac464f 100644
--- a/gcc/testsuite/gcc.dg/pr68306-3.c
+++ b/gcc/testsuite/gcc.dg/pr68306-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O3" } */
+/* { dg-options "-std=gnu17 -O3" } */
 /* { dg-additional-options "-mno-sse -mno-mmx" { target i?86-*-* x86_64-*-* } } */
 /* { dg-additional-options "-mno-altivec -mno-vsx" { target powerpc*-*-* } } */
 
diff --git a/gcc/testsuite/gcc.dg/pr68533.c b/gcc/testsuite/gcc.dg/pr68533.c
index 49e67a9..5e9a4c6 100644
--- a/gcc/testsuite/gcc.dg/pr68533.c
+++ b/gcc/testsuite/gcc.dg/pr68533.c
@@ -1,6 +1,6 @@
 /* PR c/68533 */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 struct T { int t; };
 
diff --git a/gcc/testsuite/gcc.dg/pr69156.c b/gcc/testsuite/gcc.dg/pr69156.c
index 5740971..97b46aa 100644
--- a/gcc/testsuite/gcc.dg/pr69156.c
+++ b/gcc/testsuite/gcc.dg/pr69156.c
@@ -1,6 +1,6 @@
 /* PR tree-optimization/69156 */
 /* { dg-do compile } */
-/* { dg-options "-fpermissive -O1 -fno-tree-ccp" } */
+/* { dg-options "-std=gnu17 -fpermissive -O1 -fno-tree-ccp" } */
 
 _Bool
 foo ()
diff --git a/gcc/testsuite/gcc.dg/pr7356-2.c b/gcc/testsuite/gcc.dg/pr7356-2.c
index ad67975..9bed60d 100644
--- a/gcc/testsuite/gcc.dg/pr7356-2.c
+++ b/gcc/testsuite/gcc.dg/pr7356-2.c
@@ -1,4 +1,4 @@
-/* { dg-options "-fdiagnostics-show-caret" } */
+/* { dg-options "-Wno-old-style-definition -fdiagnostics-show-caret" } */
 
 int i /* { dg-error "6: expected ';' before 'int'" } */
 int j;
diff --git a/gcc/testsuite/gcc.dg/pr79983.c b/gcc/testsuite/gcc.dg/pr79983.c
index 1e292d4..2cf8300 100644
--- a/gcc/testsuite/gcc.dg/pr79983.c
+++ b/gcc/testsuite/gcc.dg/pr79983.c
@@ -1,6 +1,6 @@
 /* PR c/79983 */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 struct S;
 struct S { int i; }; /* { dg-message "originally defined here" } */
diff --git a/gcc/testsuite/gcc.dg/pr83463.c b/gcc/testsuite/gcc.dg/pr83463.c
index 9142d27..2af130c 100644
--- a/gcc/testsuite/gcc.dg/pr83463.c
+++ b/gcc/testsuite/gcc.dg/pr83463.c
@@ -1,7 +1,7 @@
 /* PR middle-end/83463 */
 /* { dg-do compile } */
 /* { dg-prune-output "conflicting types for built-in" } */
-/* { dg-options "-O2 -Wrestrict -Wno-pointer-to-int-cast" } */
+/* { dg-options "-std=gnu17 -O2 -Wrestrict -Wno-pointer-to-int-cast" } */
 
 int *a;
 void *memcpy ();
diff --git a/gcc/testsuite/gcc.dg/pr87347.c b/gcc/testsuite/gcc.dg/pr87347.c
index 2077964..009f959 100644
--- a/gcc/testsuite/gcc.dg/pr87347.c
+++ b/gcc/testsuite/gcc.dg/pr87347.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-Wabsolute-value" } */
+/* { dg-options "-std=gnu17 -Wabsolute-value" } */
 
 int a;
 int abs();
diff --git a/gcc/testsuite/gcc.dg/pr89521-1.c b/gcc/testsuite/gcc.dg/pr89521-1.c
index ebf2c59..282c4f8 100644
--- a/gcc/testsuite/gcc.dg/pr89521-1.c
+++ b/gcc/testsuite/gcc.dg/pr89521-1.c
@@ -1,6 +1,6 @@
 /* PR c/89521 */
 /* { dg-do compile } */
-/* { dg-options "-Ofast -w" } */
+/* { dg-options "-std=gnu17 -Ofast -w" } */
 
 #define A(name) __typeof (__builtin_##name (0)) name (); long name##1 () { return name (1); }
 #define B(name) A(name) A(name##f) A(name##l)
diff --git a/gcc/testsuite/gcc.dg/pr89521-2.c b/gcc/testsuite/gcc.dg/pr89521-2.c
index 5e37c91..b5ef886 100644
--- a/gcc/testsuite/gcc.dg/pr89521-2.c
+++ b/gcc/testsuite/gcc.dg/pr89521-2.c
@@ -1,6 +1,6 @@
 /* PR c/89521 */
 /* { dg-do compile } */
-/* { dg-options "-Ofast -w" } */
+/* { dg-options "-std=gnu17 -Ofast -w" } */
 
 #define A(name) __typeof (__builtin_##name (0)) name (); \
   float name##1 () { return name (1); } \
diff --git a/gcc/testsuite/gcc.dg/pr90648.c b/gcc/testsuite/gcc.dg/pr90648.c
index bf1fa98..5a9922d 100644
--- a/gcc/testsuite/gcc.dg/pr90648.c
+++ b/gcc/testsuite/gcc.dg/pr90648.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O" } */
+/* { dg-options "-std=gnu17 -O" } */
 
 extern double copysign ();
 double foo (double x)
diff --git a/gcc/testsuite/gcc.dg/pr93573-1.c b/gcc/testsuite/gcc.dg/pr93573-1.c
index 26ec9b7..50a1c97 100644
--- a/gcc/testsuite/gcc.dg/pr93573-1.c
+++ b/gcc/testsuite/gcc.dg/pr93573-1.c
@@ -1,6 +1,6 @@
 /* PR c/93573 */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 void bar ();
 
diff --git a/gcc/testsuite/gcc.dg/pr94167.c b/gcc/testsuite/gcc.dg/pr94167.c
index 4b819d3..efc87ab 100644
--- a/gcc/testsuite/gcc.dg/pr94167.c
+++ b/gcc/testsuite/gcc.dg/pr94167.c
@@ -1,6 +1,6 @@
 /* PR debug/94167 */
 /* { dg-do compile } */
-/* { dg-options "-O2 -fcompare-debug" } */
+/* { dg-options "-std=gnu17 -O2 -fcompare-debug" } */
 
 struct S { int g, h; signed char i; int j; signed char k; int l[4]; } a, c;
 struct T { signed char g; } e;
diff --git a/gcc/testsuite/gcc.dg/pr94705.c b/gcc/testsuite/gcc.dg/pr94705.c
index 96392ab..6bd92f1 100644
--- a/gcc/testsuite/gcc.dg/pr94705.c
+++ b/gcc/testsuite/gcc.dg/pr94705.c
@@ -1,6 +1,6 @@
 /* PR c/94705 */
 /* { dg-do compile } */
-/* { dg-options "" } */
+/* { dg-options "-std=gnu17" } */
 
 void foo ();
 
diff --git a/gcc/testsuite/gcc.dg/pr95118.c b/gcc/testsuite/gcc.dg/pr95118.c
index 69bc47f..59173e6 100644
--- a/gcc/testsuite/gcc.dg/pr95118.c
+++ b/gcc/testsuite/gcc.dg/pr95118.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-fre" } */
+/* { dg-options "-std=gnu17 -O2 -fdump-tree-fre" } */
 
 void a();
 void b() {
diff --git a/gcc/testsuite/gcc.dg/pr96335.c b/gcc/testsuite/gcc.dg/pr96335.c
index ab243b3..a6203f3 100644
--- a/gcc/testsuite/gcc.dg/pr96335.c
+++ b/gcc/testsuite/gcc.dg/pr96335.c
@@ -1,6 +1,6 @@
 /* PR middle-end/96335 */
 /* { dg-do compile } */
-/* { dg-options "-O2" } */
+/* { dg-options "-std=gnu17 -O2" } */
 
 void bar (int, void *) __attribute__((__access__(__read_only__, 2)));
 
diff --git a/gcc/testsuite/gcc.dg/pr97830.c b/gcc/testsuite/gcc.dg/pr97830.c
index 3729a65..fd79620 100644
--- a/gcc/testsuite/gcc.dg/pr97830.c
+++ b/gcc/testsuite/gcc.dg/pr97830.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2" } */
+/* { dg-options "-std=gnu17 -O2" } */
 
 typedef enum { LangC } cLanguage;
 typedef enum { FunctionOneArg, FunctionStandard } cFunctionType;
diff --git a/gcc/testsuite/gcc.dg/pr97882.c b/gcc/testsuite/gcc.dg/pr97882.c
index 48ea93d..6666f89 100644
--- a/gcc/testsuite/gcc.dg/pr97882.c
+++ b/gcc/testsuite/gcc.dg/pr97882.c
@@ -1,6 +1,6 @@
 /* PR c/97882 - Segmentation Fault on improper redeclaration of function
    { dg-do compile }
-   { dg-options "" } */
+   { dg-options "-std=gnu17" } */
 
 // Check pointer declaration incompatibiliies.
 
diff --git a/gcc/testsuite/gcc.dg/pr99122-2.c b/gcc/testsuite/gcc.dg/pr99122-2.c
index c0c850f..3947f7d 100644
--- a/gcc/testsuite/gcc.dg/pr99122-2.c
+++ b/gcc/testsuite/gcc.dg/pr99122-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -g -w" } */
+/* { dg-options "-std=gnu17 -O2 -g -w" } */
 /* { dg-require-effective-target alloca } */
 
 static int foo ();
diff --git a/gcc/testsuite/gcc.dg/pr99122-3.c b/gcc/testsuite/gcc.dg/pr99122-3.c
index 6a908ad..3e72a30 100644
--- a/gcc/testsuite/gcc.dg/pr99122-3.c
+++ b/gcc/testsuite/gcc.dg/pr99122-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -g -w" } */
+/* { dg-options "-std=gnu17 -O2 -g -w" } */
 
 static int foo ();
 
diff --git a/gcc/testsuite/gcc.dg/qual-component-1.c b/gcc/testsuite/gcc.dg/qual-component-1.c
index 4eaa71a..f2043ce 100644
--- a/gcc/testsuite/gcc.dg/qual-component-1.c
+++ b/gcc/testsuite/gcc.dg/qual-component-1.c
@@ -3,7 +3,7 @@
    union.  Bug 27697 from Frank Victor Fischer.  */
 /* Origin: Joseph Myers <joseph@codesourcery.com> */
 /* { dg-do compile } */
-/* { dg-options "-pedantic -Wdiscarded-array-qualifiers" } */
+/* { dg-options "-std=gnu17 -pedantic -Wdiscarded-array-qualifiers" } */
 
 struct s {
   int a;
diff --git a/gcc/testsuite/gcc.dg/sibcall-6.c b/gcc/testsuite/gcc.dg/sibcall-6.c
index 8ee72ca..c8830b6 100644
--- a/gcc/testsuite/gcc.dg/sibcall-6.c
+++ b/gcc/testsuite/gcc.dg/sibcall-6.c
@@ -8,7 +8,7 @@
 
 /* { dg-do run { target epiphany-*-* i?86-*-* x86_64-*-* s390*-*-* } } */
 /* { dg-skip-if "" { { i?86-*-* x86_64-*-* } && { ia32 && { ! nonpic } } } } */
-/* { dg-options "-O2 -foptimize-sibling-calls -fno-ipa-cp" } */
+/* { dg-options "-Wno-old-style-definition -O2 -foptimize-sibling-calls -fno-ipa-cp" } */
 
 extern void abort (void);
 extern void exit (int);
diff --git a/gcc/testsuite/gcc.dg/sms-2.c b/gcc/testsuite/gcc.dg/sms-2.c
index f8375f9..6172314 100644
--- a/gcc/testsuite/gcc.dg/sms-2.c
+++ b/gcc/testsuite/gcc.dg/sms-2.c
@@ -2,7 +2,7 @@
    traversal of the loops after versioning.  */
 
 /* { dg-do compile } */
-/* { dg-options "-O2 -fmodulo-sched -fdump-rtl-sms" } */
+/* { dg-options "-Wno-old-style-definition -O2 -fmodulo-sched -fdump-rtl-sms" } */
 
 int th, h, em, nlwm, nlwS, nlw, sy;
 void
diff --git a/gcc/testsuite/gcc.dg/tm/20091221.c b/gcc/testsuite/gcc.dg/tm/20091221.c
index 7837243..655e55c 100644
--- a/gcc/testsuite/gcc.dg/tm/20091221.c
+++ b/gcc/testsuite/gcc.dg/tm/20091221.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-fgnu-tm -fdump-tree-tmedge" } */
+/* { dg-options "-std=gnu17 -fgnu-tm -fdump-tree-tmedge" } */
 
 int i;
 extern void virgin () __attribute__((transaction_pure));
diff --git a/gcc/testsuite/gcc.dg/torture/bfloat16-basic.c b/gcc/testsuite/gcc.dg/torture/bfloat16-basic.c
index 09e54d4..20ce60e 100644
--- a/gcc/testsuite/gcc.dg/torture/bfloat16-basic.c
+++ b/gcc/testsuite/gcc.dg/torture/bfloat16-basic.c
@@ -1,6 +1,6 @@
 /* Test __bf16.  */
 /* { dg-do run } */
-/* { dg-options "" } */
+/* { dg-options "-Wno-old-style-definition" } */
 /* { dg-add-options bfloat16 } */
 /* { dg-require-effective-target bfloat16_runtime } */
 
diff --git a/gcc/testsuite/gcc.dg/torture/float128-basic.c b/gcc/testsuite/gcc.dg/torture/float128-basic.c
index b23d45b..24a22b0 100644
--- a/gcc/testsuite/gcc.dg/torture/float128-basic.c
+++ b/gcc/testsuite/gcc.dg/torture/float128-basic.c
@@ -1,6 +1,6 @@
 /* Test _Float128.  */
 /* { dg-do run } */
-/* { dg-options "" } */
+/* { dg-options "-Wno-old-style-definition" } */
 /* { dg-add-options float128 } */
 /* { dg-require-effective-target float128_runtime } */
 
diff --git a/gcc/testsuite/gcc.dg/torture/float128x-basic.c b/gcc/testsuite/gcc.dg/torture/float128x-basic.c
index 75c5a28..ea80990 100644
--- a/gcc/testsuite/gcc.dg/torture/float128x-basic.c
+++ b/gcc/testsuite/gcc.dg/torture/float128x-basic.c
@@ -1,6 +1,6 @@
 /* Test _Float128x.  */
 /* { dg-do run } */
-/* { dg-options "" } */
+/* { dg-options "-Wno-old-style-definition" } */
 /* { dg-add-options float128x } */
 /* { dg-require-effective-target float128x_runtime } */
 
diff --git a/gcc/testsuite/gcc.dg/torture/float16-basic.c b/gcc/testsuite/gcc.dg/torture/float16-basic.c
index e94aa20..adcbdf9 100644
--- a/gcc/testsuite/gcc.dg/torture/float16-basic.c
+++ b/gcc/testsuite/gcc.dg/torture/float16-basic.c
@@ -1,6 +1,6 @@
 /* Test _Float16.  */
 /* { dg-do run } */
-/* { dg-options "" } */
+/* { dg-options "-Wno-old-style-definition" } */
 /* { dg-add-options float16 } */
 /* { dg-require-effective-target float16_runtime } */
 
diff --git a/gcc/testsuite/gcc.dg/torture/float32-basic.c b/gcc/testsuite/gcc.dg/torture/float32-basic.c
index 2d3e7a9..e6b2785 100644
--- a/gcc/testsuite/gcc.dg/torture/float32-basic.c
+++ b/gcc/testsuite/gcc.dg/torture/float32-basic.c
@@ -1,6 +1,6 @@
 /* Test _Float32.  */
 /* { dg-do run } */
-/* { dg-options "" } */
+/* { dg-options "-Wno-old-style-definition" } */
 /* { dg-add-options float32 } */
 /* { dg-require-effective-target float32_runtime } */
 
diff --git a/gcc/testsuite/gcc.dg/torture/float32x-basic.c b/gcc/testsuite/gcc.dg/torture/float32x-basic.c
index f2abc33..b4ca33f 100644
--- a/gcc/testsuite/gcc.dg/torture/float32x-basic.c
+++ b/gcc/testsuite/gcc.dg/torture/float32x-basic.c
@@ -1,6 +1,6 @@
 /* Test _Float32x.  */
 /* { dg-do run } */
-/* { dg-options "" } */
+/* { dg-options "-Wno-old-style-definition" } */
 /* { dg-add-options float32x } */
 /* { dg-require-effective-target float32x_runtime } */
 
diff --git a/gcc/testsuite/gcc.dg/torture/float64-basic.c b/gcc/testsuite/gcc.dg/torture/float64-basic.c
index decb05f..7e644c3 100644
--- a/gcc/testsuite/gcc.dg/torture/float64-basic.c
+++ b/gcc/testsuite/gcc.dg/torture/float64-basic.c
@@ -1,6 +1,6 @@
 /* Test _Float64.  */
 /* { dg-do run } */
-/* { dg-options "" } */
+/* { dg-options "-Wno-old-style-definition" } */
 /* { dg-add-options float64 } */
 /* { dg-require-effective-target float64_runtime } */
 
diff --git a/gcc/testsuite/gcc.dg/torture/float64x-basic.c b/gcc/testsuite/gcc.dg/torture/float64x-basic.c
index 7a140af..90dac84 100644
--- a/gcc/testsuite/gcc.dg/torture/float64x-basic.c
+++ b/gcc/testsuite/gcc.dg/torture/float64x-basic.c
@@ -1,6 +1,6 @@
 /* Test _Float64x.  */
 /* { dg-do run } */
-/* { dg-options "" } */
+/* { dg-options "-Wno-old-style-definition" } */
 /* { dg-add-options float64x } */
 /* { dg-require-effective-target float64x_runtime } */
 
diff --git a/gcc/testsuite/gcc.dg/torture/pr102762.c b/gcc/testsuite/gcc.dg/torture/pr102762.c
index 67c6b00..d52a970 100644
--- a/gcc/testsuite/gcc.dg/torture/pr102762.c
+++ b/gcc/testsuite/gcc.dg/torture/pr102762.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 /* We fail to diagnose the invalid __builtin_va_arg_pack use with -flto.  */
 /* { dg-skip-if "" { *-*-* } { "-flto" } { "" } } */
 
diff --git a/gcc/testsuite/gcc.dg/torture/pr103987.c b/gcc/testsuite/gcc.dg/torture/pr103987.c
index 6bfc768..6fc2eff 100644
--- a/gcc/testsuite/gcc.dg/torture/pr103987.c
+++ b/gcc/testsuite/gcc.dg/torture/pr103987.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 void foo();
 
diff --git a/gcc/testsuite/gcc.dg/torture/pr104825.c b/gcc/testsuite/gcc.dg/torture/pr104825.c
index 7affacc..417012e 100644
--- a/gcc/testsuite/gcc.dg/torture/pr104825.c
+++ b/gcc/testsuite/gcc.dg/torture/pr104825.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-additional-options "-Wno-stringop-overread" } */
+/* { dg-additional-options "-Wno-old-style-definition -Wno-stringop-overread" } */
 
 int foo (fmt)
 char* fmt;
diff --git a/gcc/testsuite/gcc.dg/torture/pr105166.c b/gcc/testsuite/gcc.dg/torture/pr105166.c
index 60e8b73..745af50 100644
--- a/gcc/testsuite/gcc.dg/torture/pr105166.c
+++ b/gcc/testsuite/gcc.dg/torture/pr105166.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 int bar (foo, a)
   int (**foo) ();
diff --git a/gcc/testsuite/gcc.dg/torture/pr105185.c b/gcc/testsuite/gcc.dg/torture/pr105185.c
index 6ab3236..88dee57 100644
--- a/gcc/testsuite/gcc.dg/torture/pr105185.c
+++ b/gcc/testsuite/gcc.dg/torture/pr105185.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-old-style-definition" } */
 
 int foo (fmt)
 char* fmt;
diff --git a/gcc/testsuite/gcc.dg/torture/pr109652.c b/gcc/testsuite/gcc.dg/torture/pr109652.c
index 8a6524d..b3d5de9 100644
--- a/gcc/testsuite/gcc.dg/torture/pr109652.c
+++ b/gcc/testsuite/gcc.dg/torture/pr109652.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 typedef int UInt;
 UInt skeletal_RI5_instr;
diff --git a/gcc/testsuite/gcc.dg/torture/pr112444.c b/gcc/testsuite/gcc.dg/torture/pr112444.c
index 61c7ec9..769df6a 100644
--- a/gcc/testsuite/gcc.dg/torture/pr112444.c
+++ b/gcc/testsuite/gcc.dg/torture/pr112444.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-additional-options "-ftrivial-auto-var-init=zero" } */
+/* { dg-additional-options "-std=gnu17 -ftrivial-auto-var-init=zero" } */
 
 int qmi_message_pbm_get_all_capabilities_output_capability_basic_information_get_printable_message_offset,
     qmi_message_pbm_get_all_capabilities_output_capability_basic_information_get_printable_message_init_offset,
diff --git a/gcc/testsuite/gcc.dg/torture/pr113895-3.c b/gcc/testsuite/gcc.dg/torture/pr113895-3.c
index 255975f..d8760e7 100644
--- a/gcc/testsuite/gcc.dg/torture/pr113895-3.c
+++ b/gcc/testsuite/gcc.dg/torture/pr113895-3.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 extern void f();
 char a[1][1], b;
diff --git a/gcc/testsuite/gcc.dg/torture/pr24626-2.c b/gcc/testsuite/gcc.dg/torture/pr24626-2.c
index 541c8c5..c6d15ea 100644
--- a/gcc/testsuite/gcc.dg/torture/pr24626-2.c
+++ b/gcc/testsuite/gcc.dg/torture/pr24626-2.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 typedef unsigned int u_int8_t __attribute__ ((__mode__ (__QI__)));
 typedef unsigned int u_int32_t __attribute__ ((__mode__ (__SI__)));
diff --git a/gcc/testsuite/gcc.dg/torture/pr25183.c b/gcc/testsuite/gcc.dg/torture/pr25183.c
index 84b4c8f..22af72b 100644
--- a/gcc/testsuite/gcc.dg/torture/pr25183.c
+++ b/gcc/testsuite/gcc.dg/torture/pr25183.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-pedantic" } */
+/* { dg-options "-std=gnu17 -pedantic" } */
 
 enum err {
   err_IO = 0x8a450000, /* { dg-warning "int" } */
diff --git a/gcc/testsuite/gcc.dg/torture/pr38948.c b/gcc/testsuite/gcc.dg/torture/pr38948.c
index 22cef3b..01b7213 100644
--- a/gcc/testsuite/gcc.dg/torture/pr38948.c
+++ b/gcc/testsuite/gcc.dg/torture/pr38948.c
@@ -1,4 +1,4 @@
-/* { dg-options "-fno-tree-sra" } */
+/* { dg-options "-std=gnu17 -fno-tree-sra" } */
 typedef unsigned char byte;
 typedef unsigned int uint;
 typedef int bool;
diff --git a/gcc/testsuite/gcc.dg/torture/pr44807.c b/gcc/testsuite/gcc.dg/torture/pr44807.c
index 918333e..2230db6 100644
--- a/gcc/testsuite/gcc.dg/torture/pr44807.c
+++ b/gcc/testsuite/gcc.dg/torture/pr44807.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 int sigemptyset (int *);
 int sigaddset(int, int);
diff --git a/gcc/testsuite/gcc.dg/torture/pr47281.c b/gcc/testsuite/gcc.dg/torture/pr47281.c
index 517e854..752b472 100644
--- a/gcc/testsuite/gcc.dg/torture/pr47281.c
+++ b/gcc/testsuite/gcc.dg/torture/pr47281.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 struct T;
 typedef void F(void);
diff --git a/gcc/testsuite/gcc.dg/torture/pr47958-1.c b/gcc/testsuite/gcc.dg/torture/pr47958-1.c
index 9fdf142f..14feffb 100644
--- a/gcc/testsuite/gcc.dg/torture/pr47958-1.c
+++ b/gcc/testsuite/gcc.dg/torture/pr47958-1.c
@@ -1,4 +1,5 @@
 /* { dg-do assemble } */
+/* { dg-additional-options "-Wno-old-style-definition" } */
 
 void (*foo[6][6]) (int);
 void bar (hdR)
diff --git a/gcc/testsuite/gcc.dg/torture/pr48063.c b/gcc/testsuite/gcc.dg/torture/pr48063.c
index d861bf0..ff6960f 100644
--- a/gcc/testsuite/gcc.dg/torture/pr48063.c
+++ b/gcc/testsuite/gcc.dg/torture/pr48063.c
@@ -1,6 +1,6 @@
 /* PR tree-optimization/48063 */
 /* { dg-do compile } */
-/* { dg-options "-fno-early-inlining" } */
+/* { dg-options "-std=gnu17 -fno-early-inlining" } */
 
 extern void abort (void);
 static void bar ();
diff --git a/gcc/testsuite/gcc.dg/torture/pr57036-1.c b/gcc/testsuite/gcc.dg/torture/pr57036-1.c
index ac6bc6b..b1cddb1 100644
--- a/gcc/testsuite/gcc.dg/torture/pr57036-1.c
+++ b/gcc/testsuite/gcc.dg/torture/pr57036-1.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 extern void g (void);
 int _setjmp();
diff --git a/gcc/testsuite/gcc.dg/torture/pr57330.c b/gcc/testsuite/gcc.dg/torture/pr57330.c
index 3e6cbcb..362622c 100644
--- a/gcc/testsuite/gcc.dg/torture/pr57330.c
+++ b/gcc/testsuite/gcc.dg/torture/pr57330.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 void foo (int a)
 {}
diff --git a/gcc/testsuite/gcc.dg/torture/pr57584.c b/gcc/testsuite/gcc.dg/torture/pr57584.c
index e4affb2..475dabe 100644
--- a/gcc/testsuite/gcc.dg/torture/pr57584.c
+++ b/gcc/testsuite/gcc.dg/torture/pr57584.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-require-effective-target int32plus } */
 /* { dg-require-effective-target label_values } */
 /* { dg-require-effective-target indirect_jumps } */
diff --git a/gcc/testsuite/gcc.dg/torture/pr67741.c b/gcc/testsuite/gcc.dg/torture/pr67741.c
index c0019d0..d1a8c25 100644
--- a/gcc/testsuite/gcc.dg/torture/pr67741.c
+++ b/gcc/testsuite/gcc.dg/torture/pr67741.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 struct singlecomplex { float real, imag ; } ;
 struct doublecomplex { double real, imag ; } ;
diff --git a/gcc/testsuite/gcc.dg/torture/pr68104.c b/gcc/testsuite/gcc.dg/torture/pr68104.c
index 5db0282..8743ecf5 100644
--- a/gcc/testsuite/gcc.dg/torture/pr68104.c
+++ b/gcc/testsuite/gcc.dg/torture/pr68104.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 typedef struct
 {
diff --git a/gcc/testsuite/gcc.dg/torture/pr69242.c b/gcc/testsuite/gcc.dg/torture/pr69242.c
index d7f1718..2a50a16 100644
--- a/gcc/testsuite/gcc.dg/torture/pr69242.c
+++ b/gcc/testsuite/gcc.dg/torture/pr69242.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-additional-options "-w" } */
+/* { dg-additional-options "-std=gnu17 -w" } */
 
 int a[1];
 void *memcpy();
diff --git a/gcc/testsuite/gcc.dg/torture/pr70457.c b/gcc/testsuite/gcc.dg/torture/pr70457.c
index 74daed4..e0a212f 100644
--- a/gcc/testsuite/gcc.dg/torture/pr70457.c
+++ b/gcc/testsuite/gcc.dg/torture/pr70457.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 /* This formerly ICEd when trying to expand pow as a built-in with
    the wrong number of arguments.  */
diff --git a/gcc/testsuite/gcc.dg/torture/pr70985.c b/gcc/testsuite/gcc.dg/torture/pr70985.c
index 17273b0..3654493 100644
--- a/gcc/testsuite/gcc.dg/torture/pr70985.c
+++ b/gcc/testsuite/gcc.dg/torture/pr70985.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-require-effective-target int32plus } */
 
 struct
diff --git a/gcc/testsuite/gcc.dg/torture/pr71606.c b/gcc/testsuite/gcc.dg/torture/pr71606.c
index b0cc26a..ec7a110 100644
--- a/gcc/testsuite/gcc.dg/torture/pr71606.c
+++ b/gcc/testsuite/gcc.dg/torture/pr71606.c
@@ -1,3 +1,5 @@
+/* { dg-additional-options "-std=gnu17" } */
+
 _Complex a;
 void fn1 ();
 
diff --git a/gcc/testsuite/gcc.dg/torture/pr71816.c b/gcc/testsuite/gcc.dg/torture/pr71816.c
index cc143fa..5db86b9 100644
--- a/gcc/testsuite/gcc.dg/torture/pr71816.c
+++ b/gcc/testsuite/gcc.dg/torture/pr71816.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-prune-output "\\\[-Wbuiltin-declaration-mismatch" } */
 
 void *ext2fs_resize_mem_p;
diff --git a/gcc/testsuite/gcc.dg/torture/pr77286.c b/gcc/testsuite/gcc.dg/torture/pr77286.c
index 0c06100..29d96eb 100644
--- a/gcc/testsuite/gcc.dg/torture/pr77286.c
+++ b/gcc/testsuite/gcc.dg/torture/pr77286.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-additional-options "-mavx2" { target x86_64-*-* i?86-*-* } } */
 
 typedef float real;
diff --git a/gcc/testsuite/gcc.dg/torture/pr77646.c b/gcc/testsuite/gcc.dg/torture/pr77646.c
index 1b19900..6366c1b 100644
--- a/gcc/testsuite/gcc.dg/torture/pr77646.c
+++ b/gcc/testsuite/gcc.dg/torture/pr77646.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 struct e {
     int (*f)();
diff --git a/gcc/testsuite/gcc.dg/torture/pr77677-2.c b/gcc/testsuite/gcc.dg/torture/pr77677-2.c
index 768ab12..4ba25f0 100644
--- a/gcc/testsuite/gcc.dg/torture/pr77677-2.c
+++ b/gcc/testsuite/gcc.dg/torture/pr77677-2.c
@@ -1,6 +1,6 @@
 /* PR ipa/77677 */
 /* { dg-do compile } */
-/* { dg-options "-fpermissive -w" } */
+/* { dg-options "-std=gnu17 -fpermissive -w" } */
 
 enum machine_mode { MAX_MACHINE_MODE };
 
diff --git a/gcc/testsuite/gcc.dg/torture/pr78365.c b/gcc/testsuite/gcc.dg/torture/pr78365.c
index 5180a01..2588a48 100644
--- a/gcc/testsuite/gcc.dg/torture/pr78365.c
+++ b/gcc/testsuite/gcc.dg/torture/pr78365.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-old-style-definition" } */
 
 int a, b, c;
 char d;
diff --git a/gcc/testsuite/gcc.dg/torture/pr79732.c b/gcc/testsuite/gcc.dg/torture/pr79732.c
index ed2695b..cfa337c 100644
--- a/gcc/testsuite/gcc.dg/torture/pr79732.c
+++ b/gcc/testsuite/gcc.dg/torture/pr79732.c
@@ -1,4 +1,5 @@
 /* { dg-do link } */
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-require-alias "" } */
 
 int bar () __attribute__ ((alias ("foo")));
diff --git a/gcc/testsuite/gcc.dg/torture/pr80612.c b/gcc/testsuite/gcc.dg/torture/pr80612.c
index e648e82..d3f82d3 100644
--- a/gcc/testsuite/gcc.dg/torture/pr80612.c
+++ b/gcc/testsuite/gcc.dg/torture/pr80612.c
@@ -1,5 +1,6 @@
 /* PR tree-optimization/80612 */
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 struct obstack *a;
 struct obstack {
diff --git a/gcc/testsuite/gcc.dg/torture/pr80764.c b/gcc/testsuite/gcc.dg/torture/pr80764.c
index bc6d8e8..c8e56559 100644
--- a/gcc/testsuite/gcc.dg/torture/pr80764.c
+++ b/gcc/testsuite/gcc.dg/torture/pr80764.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 int b, d, f, h;
 char e;
diff --git a/gcc/testsuite/gcc.dg/torture/pr80842.c b/gcc/testsuite/gcc.dg/torture/pr80842.c
index 600e8ce..2fc4059 100644
--- a/gcc/testsuite/gcc.dg/torture/pr80842.c
+++ b/gcc/testsuite/gcc.dg/torture/pr80842.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 unsigned a;
 short b;
diff --git a/gcc/testsuite/gcc.dg/torture/pr81900.c b/gcc/testsuite/gcc.dg/torture/pr81900.c
index 9e4e8f4..2936f1d 100644
--- a/gcc/testsuite/gcc.dg/torture/pr81900.c
+++ b/gcc/testsuite/gcc.dg/torture/pr81900.c
@@ -1,7 +1,7 @@
 /* PR/81900 */
 /* { dg-do compile } */
 /* { dg-skip-if "" { *-*-* } { "-flto" } { "" } } */
-/* { dg-options "-fdump-tree-optimized" } */
+/* { dg-options "-std=gnu17 -fdump-tree-optimized" } */
 
 void Perl_croak() __attribute__((noreturn));
 char *Perl_sv_gets();
diff --git a/gcc/testsuite/gcc.dg/torture/pr82276.c b/gcc/testsuite/gcc.dg/torture/pr82276.c
index 2f9efc8..fc9f2c5 100644
--- a/gcc/testsuite/gcc.dg/torture/pr82276.c
+++ b/gcc/testsuite/gcc.dg/torture/pr82276.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 typedef struct a {
   struct a *b;
diff --git a/gcc/testsuite/gcc.dg/torture/pr84803.c b/gcc/testsuite/gcc.dg/torture/pr84803.c
index 81aad62..e9f3783 100644
--- a/gcc/testsuite/gcc.dg/torture/pr84803.c
+++ b/gcc/testsuite/gcc.dg/torture/pr84803.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 long a;
 long *b;
diff --git a/gcc/testsuite/gcc.dg/torture/pr93124.c b/gcc/testsuite/gcc.dg/torture/pr93124.c
index 0d361d8..e654ab8 100644
--- a/gcc/testsuite/gcc.dg/torture/pr93124.c
+++ b/gcc/testsuite/gcc.dg/torture/pr93124.c
@@ -1,4 +1,4 @@
-/* { dg-additional-options "-fno-rerun-cse-after-loop -fno-guess-branch-probability -fno-tree-fre" } */
+/* { dg-additional-options "-std=gnu17 -fno-rerun-cse-after-loop -fno-guess-branch-probability -fno-tree-fre" } */
 /* { dg-require-effective-target alloca } */
 
 int x;
diff --git a/gcc/testsuite/gcc.dg/torture/pr97330-1.c b/gcc/testsuite/gcc.dg/torture/pr97330-1.c
index 7dce5bd..8bd2037 100644
--- a/gcc/testsuite/gcc.dg/torture/pr97330-1.c
+++ b/gcc/testsuite/gcc.dg/torture/pr97330-1.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-old-style-definition" } */
 
 typedef int a;
 typedef char b;
diff --git a/gcc/testsuite/gcc.dg/tree-prof/comp-goto-1.c b/gcc/testsuite/gcc.dg/tree-prof/comp-goto-1.c
index baed1e3..322ebf7 100644
--- a/gcc/testsuite/gcc.dg/tree-prof/comp-goto-1.c
+++ b/gcc/testsuite/gcc.dg/tree-prof/comp-goto-1.c
@@ -1,6 +1,6 @@
 /* { dg-require-effective-target freorder } */
 /* { dg-require-effective-target label_values } */
-/* { dg-options "-O2 -freorder-blocks-and-partition" } */
+/* { dg-options "-std=gnu17 -O2 -freorder-blocks-and-partition" } */
 /* { dg-require-stack-size "4000" } */
 
 #include <stdlib.h>
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030703-2.c b/gcc/testsuite/gcc.dg/tree-ssa/20030703-2.c
index ce50af2..9fa3a88 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030703-2.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030703-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O1 -fdump-tree-dom2" } */
+/* { dg-options "-Wno-old-style-definition -O1 -fdump-tree-dom2" } */
 
 extern void abort (void);
 
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030708-1.c b/gcc/testsuite/gcc.dg/tree-ssa/20030708-1.c
index 8b7ab98..9910c79 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030708-1.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030708-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O1 -fdump-tree-dom2" } */
+/* { dg-options "-Wno-old-style-definition -O1 -fdump-tree-dom2" } */
 extern void abort (void);
 struct rtx_def;
 typedef struct rtx_def *rtx;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030709-2.c b/gcc/testsuite/gcc.dg/tree-ssa/20030709-2.c
index 78938f9..e228400 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030709-2.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030709-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O -fdump-tree-dce3" } */
+/* { dg-options "-Wno-old-style-definition -O -fdump-tree-dce3" } */
   
 struct rtx_def;
 typedef struct rtx_def *rtx;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030709-3.c b/gcc/testsuite/gcc.dg/tree-ssa/20030709-3.c
index 838317d..2c9920ae 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030709-3.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030709-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O1 -fdump-tree-dom2" } */
+/* { dg-options "-Wno-old-style-definition -O1 -fdump-tree-dom2" } */
   
 extern void abort (void);
 
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030710-1.c b/gcc/testsuite/gcc.dg/tree-ssa/20030710-1.c
index 529c79b..11391e6 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030710-1.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030710-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O1 -fdump-tree-copyprop2" } */
+/* { dg-options "-Wno-old-style-definition -O1 -fdump-tree-copyprop2" } */
 
 extern void abort (void);
 extern void blah (void);
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030711-1.c b/gcc/testsuite/gcc.dg/tree-ssa/20030711-1.c
index 080ccfa..c3f75ef 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030711-1.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030711-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O1 -fdump-tree-dom2" } */
+/* { dg-options "-Wno-old-style-definition -O1 -fdump-tree-dom2" } */
  
 extern void abort (void);
 extern void blah (void);
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030711-2.c b/gcc/testsuite/gcc.dg/tree-ssa/20030711-2.c
index 7fce5ab..6f3c8c30 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030711-2.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030711-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-dom2" } */
+/* { dg-options "-Wno-old-style-definition -O2 -fdump-tree-dom2" } */
   
 
 struct rtx_def;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030711-3.c b/gcc/testsuite/gcc.dg/tree-ssa/20030711-3.c
index 15d7e97..f5b0a14 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030711-3.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030711-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O1 -fdump-tree-dom2" } */
+/* { dg-options "-Wno-old-style-definition -O1 -fdump-tree-dom2" } */
   
 
 struct rtx_def;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030714-1.c b/gcc/testsuite/gcc.dg/tree-ssa/20030714-1.c
index 9f0daac..ad1b8ad 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030714-1.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030714-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O1 -fdump-tree-dom2" } */
+/* { dg-options "-Wno-old-style-definition -O1 -fdump-tree-dom2" } */
    
 struct rtx_def;
 typedef struct rtx_def *rtx;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030714-2.c b/gcc/testsuite/gcc.dg/tree-ssa/20030714-2.c
index 9585ff1..a3b564d 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030714-2.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030714-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O1 -fdump-tree-dom2" } */
+/* { dg-options "-Wno-old-style-definition -O1 -fdump-tree-dom2" } */
    
 
 union tree_node;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030728-1.c b/gcc/testsuite/gcc.dg/tree-ssa/20030728-1.c
index 7c1fea7..10ed817d 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030728-1.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030728-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-rtl-expand-details" } */
+/* { dg-options "-Wno-old-style-definition -O2 -fdump-rtl-expand-details" } */
     
 
 union tree_node;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030807-10.c b/gcc/testsuite/gcc.dg/tree-ssa/20030807-10.c
index 0e01e51..939dbae 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030807-10.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030807-10.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-vrp1" } */
+/* { dg-options "-Wno-old-style-definition -O2 -fdump-tree-vrp1" } */
      
 
 extern const unsigned char mode_size[];
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030807-11.c b/gcc/testsuite/gcc.dg/tree-ssa/20030807-11.c
index 6effbb7..e7e73cb 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030807-11.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030807-11.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O1 -fdump-tree-dom2" } */
+/* { dg-options "-Wno-old-style-definition -O1 -fdump-tree-dom2" } */
 
 extern void abort (void);
 struct rtx_def;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030807-3.c b/gcc/testsuite/gcc.dg/tree-ssa/20030807-3.c
index bba3569..1097798 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030807-3.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030807-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O1 -fdump-tree-dom2" } */
+/* { dg-options "-Wno-old-style-definition -O1 -fdump-tree-dom2" } */
                                                                                 
 typedef unsigned int cppchar_t;
 void foo (void);
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030807-6.c b/gcc/testsuite/gcc.dg/tree-ssa/20030807-6.c
index e680de8..1453df6 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030807-6.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030807-6.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-vrp1" } */
+/* { dg-options "-Wno-old-style-definition -O2 -fdump-tree-vrp1" } */
      
 
 void
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030807-7.c b/gcc/testsuite/gcc.dg/tree-ssa/20030807-7.c
index ca06f71..857191d 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030807-7.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030807-7.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-vrp1" } */
+/* { dg-options "-Wno-old-style-definition -O2 -fdump-tree-vrp1" } */
   
 extern void abort (void);
 
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030814-4.c b/gcc/testsuite/gcc.dg/tree-ssa/20030814-4.c
index e59b3e3..53a2d01 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030814-4.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030814-4.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O1 -fdump-tree-dom2 -fdump-tree-optimized" } */
+/* { dg-options "-Wno-old-style-definition -O1 -fdump-tree-dom2 -fdump-tree-optimized" } */
     
 extern void abort (void);
 union tree_node;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030814-5.c b/gcc/testsuite/gcc.dg/tree-ssa/20030814-5.c
index 1b0bef1..986540c 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030814-5.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030814-5.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O1 -fdump-tree-dom2 -fdump-tree-optimized" } */
+/* { dg-options "-Wno-old-style-definition -O1 -fdump-tree-dom2 -fdump-tree-optimized" } */
     
 extern void abort (void);
 union tree_node;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030814-6.c b/gcc/testsuite/gcc.dg/tree-ssa/20030814-6.c
index e4b8d43..d147dff 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030814-6.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030814-6.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O1 -fno-tree-fre -fdump-tree-dom2" } */
+/* { dg-options "-Wno-old-style-definition -O1 -fno-tree-fre -fdump-tree-dom2" } */
 
 extern void abort (void);
 union tree_node;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20030918-1.c b/gcc/testsuite/gcc.dg/tree-ssa/20030918-1.c
index 719ea65..271f0a5 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20030918-1.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030918-1.c
@@ -2,7 +2,7 @@
    references after propagating &equot[0] into p.  */
 
 /* { dg-do compile } */
-/* { dg-options "-O -ftree-dominator-opts" } */
+/* { dg-options "-Wno-old-style-definition -O -ftree-dominator-opts" } */
 
 static unsigned short equot[(6 +3)];
 int
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20040514-2.c b/gcc/testsuite/gcc.dg/tree-ssa/20040514-2.c
index 11f7667..5ec48e3 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20040514-2.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20040514-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-phiopt1" } */
+/* { dg-options "-Wno-old-style-definition -O2 -fdump-tree-phiopt1" } */
 int
 foo2 (distance, i, j)
      int distance;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/loadpre7.c b/gcc/testsuite/gcc.dg/tree-ssa/loadpre7.c
index 52903dd..7461008 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/loadpre7.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/loadpre7.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */ 
-/* { dg-options "-O2 -fdump-tree-pre-stats" } */
+/* { dg-options "-Wno-old-style-definition -O2 -fdump-tree-pre-stats" } */
 /* We can't eliminate the *p load here in any sane way, as eshup8 may 
    change it.  */
 
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr111003.c b/gcc/testsuite/gcc.dg/tree-ssa/pr111003.c
index a520765..59d3a96 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/pr111003.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr111003.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O3 -fdump-tree-optimized" } */
+/* { dg-options "-std=gnu17 -O3 -fdump-tree-optimized" } */
 
 static int c, d, e, f;
 static short g;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr115128.c b/gcc/testsuite/gcc.dg/tree-ssa/pr115128.c
index 14bd4db..2788430 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/pr115128.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr115128.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O3 -w" } */
+/* { dg-options "-std=gnu17 -O3 -w" } */
 
 long XXH3_len_4to8_64b_len, XXH3_len_0to16_64b___trans_tmp_3, XXH3_mix2Accs_acc,
     XXH3_64bits_internal___trans_tmp_8;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr115191.c b/gcc/testsuite/gcc.dg/tree-ssa/pr115191.c
index 43f780a..fe0c132 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/pr115191.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr115191.c
@@ -1,5 +1,5 @@
 // { dg-do compile }
-// { dg-options "-O1 -w" }
+// { dg-options "-std=gnu17 -O1 -w" }
 
 typedef void *SCM;
 void set_socket_io_ports();
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr24840.c b/gcc/testsuite/gcc.dg/tree-ssa/pr24840.c
index 0ce9ed3..b749151 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/pr24840.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr24840.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2" } */
+/* { dg-options "-std=gnu17 -O2" } */
 
 typedef struct
 {
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr69666.c b/gcc/testsuite/gcc.dg/tree-ssa/pr69666.c
index 9be77ea..220c0cd 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/pr69666.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr69666.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -w" } */
+/* { dg-options "-std=gnu17 -O2 -w" } */
 
 int a, c, d;
 float b;
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr70232.c b/gcc/testsuite/gcc.dg/tree-ssa/pr70232.c
index d636672..6873f87 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/pr70232.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr70232.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -w -fdump-tree-vrp1-details -fdump-tree-vrp2-details -fdump-tree-dom2-details -fdump-tree-dom3-details" } */
+/* { dg-options "-std=gnu17 -O2 -w -fdump-tree-vrp1-details -fdump-tree-vrp2-details -fdump-tree-dom2-details -fdump-tree-dom3-details" } */
 
 /* All the threads found by the threader should have too many
    statements to be profitable.  */
diff --git a/gcc/testsuite/gcc.dg/ubsan/pr79757-1.c b/gcc/testsuite/gcc.dg/ubsan/pr79757-1.c
index ca074bc..20ed2cd 100644
--- a/gcc/testsuite/gcc.dg/ubsan/pr79757-1.c
+++ b/gcc/testsuite/gcc.dg/ubsan/pr79757-1.c
@@ -1,7 +1,7 @@
 /* PR sanitizer/79757 */
 /* { dg-do compile } */
 /* { dg-require-effective-target int128 } */
-/* { dg-options "-fsanitize=undefined" } */
+/* { dg-options "-Wno-old-style-definition -fsanitize=undefined" } */
 
 unsigned __int128 x, y;
 
diff --git a/gcc/testsuite/gcc.dg/ubsan/pr79757-2.c b/gcc/testsuite/gcc.dg/ubsan/pr79757-2.c
index b3e1939..32e38c1 100644
--- a/gcc/testsuite/gcc.dg/ubsan/pr79757-2.c
+++ b/gcc/testsuite/gcc.dg/ubsan/pr79757-2.c
@@ -1,7 +1,7 @@
 /* PR sanitizer/79757 */
 /* { dg-do compile } */
 /* { dg-require-effective-target int128 } */
-/* { dg-options "-fsanitize=undefined" } */
+/* { dg-options "-Wno-old-style-definition -fsanitize=undefined" } */
 
 unsigned __int128 x, y;
 
diff --git a/gcc/testsuite/gcc.dg/ubsan/pr79757-3.c b/gcc/testsuite/gcc.dg/ubsan/pr79757-3.c
index 22fe3de..7eb3fee 100644
--- a/gcc/testsuite/gcc.dg/ubsan/pr79757-3.c
+++ b/gcc/testsuite/gcc.dg/ubsan/pr79757-3.c
@@ -1,7 +1,7 @@
 /* PR sanitizer/79757 */
 /* { dg-do compile } */
 /* { dg-require-effective-target int128 } */
-/* { dg-options "-fsanitize=undefined" } */
+/* { dg-options "-Wno-old-style-definition -fsanitize=undefined" } */
 
 unsigned __int128 x, y;
 
diff --git a/gcc/testsuite/gcc.dg/ubsan/pr81223.c b/gcc/testsuite/gcc.dg/ubsan/pr81223.c
index e7aff52..f72b1cd 100644
--- a/gcc/testsuite/gcc.dg/ubsan/pr81223.c
+++ b/gcc/testsuite/gcc.dg/ubsan/pr81223.c
@@ -1,6 +1,6 @@
 /* PR sanitizer/81223 */
 /* { dg-do compile } */
-/* { dg-options "-fsanitize=undefined" } */
+/* { dg-options "-std=gnu17 -fsanitize=undefined" } */
 
 void bar ();
 
diff --git a/gcc/testsuite/gcc.dg/uninit-10-O0.c b/gcc/testsuite/gcc.dg/uninit-10-O0.c
index f761ac9..18fe56c 100644
--- a/gcc/testsuite/gcc.dg/uninit-10-O0.c
+++ b/gcc/testsuite/gcc.dg/uninit-10-O0.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-Wall" } */
+/* { dg-options "-Wno-old-style-definition -Wall" } */
 /* On Alpha EV4, dead code elimination and cfg simplification conspired
    to leave the register containing 'C' marked live, though all references
    to the variable had been removed.  */
diff --git a/gcc/testsuite/gcc.dg/uninit-10.c b/gcc/testsuite/gcc.dg/uninit-10.c
index 0d62020..e2396a5 100644
--- a/gcc/testsuite/gcc.dg/uninit-10.c
+++ b/gcc/testsuite/gcc.dg/uninit-10.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -Wall" } */
+/* { dg-options "-Wno-old-style-definition -O2 -Wall" } */
 /* On Alpha EV4, dead code elimination and cfg simplification conspired
    to leave the register containing 'C' marked live, though all references
    to the variable had been removed.  */
diff --git a/gcc/testsuite/gcc.dg/uninit-32.c b/gcc/testsuite/gcc.dg/uninit-32.c
index cf9efa0..586b635 100644
--- a/gcc/testsuite/gcc.dg/uninit-32.c
+++ b/gcc/testsuite/gcc.dg/uninit-32.c
@@ -1,7 +1,7 @@
 /* PR middle-end/10138 - warn for uninitialized arrays passed as const*
    arguments
    { dg-do compile }
-   { dg-options "-O -Wall" }
+   { dg-options "-std=gnu17 -O -Wall" }
    { dg-require-effective-target alloca } */
 
 typedef __SIZE_TYPE__ size_t;
diff --git a/gcc/testsuite/gcc.dg/uninit-41.c b/gcc/testsuite/gcc.dg/uninit-41.c
index f2e17a8..2f138cb 100644
--- a/gcc/testsuite/gcc.dg/uninit-41.c
+++ b/gcc/testsuite/gcc.dg/uninit-41.c
@@ -1,7 +1,7 @@
 /* Verify that calls to non-modifying built-ins aren't considered
    potentially modifying.
    { dg-do compile }
-   { dg-options "-O2 -Wall" }
+   { dg-options "-std=gnu17 -O2 -Wall" }
    { dg-require-effective-target alloca } */
 
 typedef __SIZE_TYPE__ size_t;
diff --git a/gcc/testsuite/gcc.dg/uninit-A-O0.c b/gcc/testsuite/gcc.dg/uninit-A-O0.c
index 6937691..c1f1a1c 100644
--- a/gcc/testsuite/gcc.dg/uninit-A-O0.c
+++ b/gcc/testsuite/gcc.dg/uninit-A-O0.c
@@ -2,7 +2,7 @@
    May be a real bug in CSE. */
 
 /* { dg-do compile } */
-/* { dg-options "-Wall" } */
+/* { dg-options "-Wno-old-style-definition -Wall" } */
 
 struct tree
 {
diff --git a/gcc/testsuite/gcc.dg/uninit-A.c b/gcc/testsuite/gcc.dg/uninit-A.c
index 28f7fe9..2adc374 100644
--- a/gcc/testsuite/gcc.dg/uninit-A.c
+++ b/gcc/testsuite/gcc.dg/uninit-A.c
@@ -2,7 +2,7 @@
    May be a real bug in CSE. */
 
 /* { dg-do compile } */
-/* { dg-options "-O2 -Wall" } */
+/* { dg-options "-O2 -Wall -Wno-old-style-definition" } */
 
 struct tree
 {
diff --git a/gcc/testsuite/gcc.dg/unused-1.c b/gcc/testsuite/gcc.dg/unused-1.c
index 8db7c2c..2cc86c0 100644
--- a/gcc/testsuite/gcc.dg/unused-1.c
+++ b/gcc/testsuite/gcc.dg/unused-1.c
@@ -2,7 +2,7 @@
    egcs-1.1.2 fails, egcs-ss-19990418 passes.
    http://gcc.gnu.org/ml/gcc-bugs/1998-09/msg00199.html */
 /* { dg-do compile } */
-/* { dg-options "-O -Wall -W" } */
+/* { dg-options "-Wno-old-style-definition -O -Wall -W" } */
 int
 f(c)
      char c; /* { dg-warning "unused parameter" "unused parameter warning" } */
diff --git a/gcc/testsuite/gcc.dg/vect/bb-slp-pr114249.c b/gcc/testsuite/gcc.dg/vect/bb-slp-pr114249.c
index 64c93cd..36ccb2c 100644
--- a/gcc/testsuite/gcc.dg/vect/bb-slp-pr114249.c
+++ b/gcc/testsuite/gcc.dg/vect/bb-slp-pr114249.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 enum { SEG_THIN_POOL } read_only;
 struct {
diff --git a/gcc/testsuite/gcc.dg/vect/bb-slp-pr97486.c b/gcc/testsuite/gcc.dg/vect/bb-slp-pr97486.c
index 17d48a7..fceb933 100644
--- a/gcc/testsuite/gcc.dg/vect/bb-slp-pr97486.c
+++ b/gcc/testsuite/gcc.dg/vect/bb-slp-pr97486.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 
 struct {
   int *end_info;
diff --git a/gcc/testsuite/gcc.dg/vect/bb-slp-subgroups-1.c b/gcc/testsuite/gcc.dg/vect/bb-slp-subgroups-1.c
index bea3b92..dd3f91b 100644
--- a/gcc/testsuite/gcc.dg/vect/bb-slp-subgroups-1.c
+++ b/gcc/testsuite/gcc.dg/vect/bb-slp-subgroups-1.c
@@ -1,3 +1,4 @@
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-require-effective-target vect_int } */
 /* PR tree-optimization/67682.  */
 
diff --git a/gcc/testsuite/gcc.dg/vect/bb-slp-subgroups-2.c b/gcc/testsuite/gcc.dg/vect/bb-slp-subgroups-2.c
index 9431bcb..2ee5003 100644
--- a/gcc/testsuite/gcc.dg/vect/bb-slp-subgroups-2.c
+++ b/gcc/testsuite/gcc.dg/vect/bb-slp-subgroups-2.c
@@ -1,3 +1,4 @@
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-require-effective-target vect_int } */
 /* { dg-require-effective-target vect_perm } */
 /* PR tree-optimization/67682.  */
diff --git a/gcc/testsuite/gcc.dg/vect/bb-slp-subgroups-3.c b/gcc/testsuite/gcc.dg/vect/bb-slp-subgroups-3.c
index d1d7912..1b3d5d9 100644
--- a/gcc/testsuite/gcc.dg/vect/bb-slp-subgroups-3.c
+++ b/gcc/testsuite/gcc.dg/vect/bb-slp-subgroups-3.c
@@ -1,3 +1,4 @@
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-require-effective-target vect_int } */
 /* { dg-require-effective-target vect_int_mult } */
 /* PR tree-optimization/67682.  */
diff --git a/gcc/testsuite/gcc.dg/vect/vect-early-break_111-pr113731.c b/gcc/testsuite/gcc.dg/vect/vect-early-break_111-pr113731.c
index b205f47..05edf59 100644
--- a/gcc/testsuite/gcc.dg/vect/vect-early-break_111-pr113731.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-early-break_111-pr113731.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-add-options vect_early_break } */
 /* { dg-require-effective-target vect_early_break } */
 /* { dg-require-effective-target vect_long } */
diff --git a/gcc/testsuite/gcc.dg/vect/vect-early-break_122-pr114239.c b/gcc/testsuite/gcc.dg/vect/vect-early-break_122-pr114239.c
index 7bf4db1..eea47f7 100644
--- a/gcc/testsuite/gcc.dg/vect/vect-early-break_122-pr114239.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-early-break_122-pr114239.c
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-add-options vect_early_break } */
 /* { dg-require-effective-target vect_early_break } */
 
diff --git a/gcc/testsuite/gcc.dg/vect/vect-multi-peel-gaps.c b/gcc/testsuite/gcc.dg/vect/vect-multi-peel-gaps.c
index 033c358..d914b88 100644
--- a/gcc/testsuite/gcc.dg/vect/vect-multi-peel-gaps.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-multi-peel-gaps.c
@@ -6,6 +6,7 @@
    increment by 2 integers at a time, hence the last load needs s[30-33] and
    the penultimate load needs s[28-31].
    This testcase ensures that we do not crash due to that behaviour.  */
+/* { dg-additional-options "-std=gnu17" } */
 /* { dg-require-effective-target mmap } */
 #include <sys/mman.h>
 #include <stdio.h>
diff --git a/gcc/testsuite/gcc.dg/vla-stexp-2.c b/gcc/testsuite/gcc.dg/vla-stexp-2.c
index 9f15125..8616ef7 100644
--- a/gcc/testsuite/gcc.dg/vla-stexp-2.c
+++ b/gcc/testsuite/gcc.dg/vla-stexp-2.c
@@ -1,6 +1,6 @@
 /* PR101838 */
 /* { dg-do run } */
-/* { dg-options "-Wpedantic -O0" } */
+/* { dg-options "-std=gnu17 -Wpedantic -O0" } */
 /* { dg-require-effective-target alloca } */
 
 
diff --git a/gcc/testsuite/gcc.dg/warn-1.c b/gcc/testsuite/gcc.dg/warn-1.c
index 6db4ae5..d5acca2 100644
--- a/gcc/testsuite/gcc.dg/warn-1.c
+++ b/gcc/testsuite/gcc.dg/warn-1.c
@@ -1,7 +1,7 @@
 /* The compiler used to say passing arg 0 of, which is wrong.  */
 /* Radar 3069179 */
 
-/* { dg-options "-O3" } */
+/* { dg-options "-Wno-old-style-definition -O3" } */
 
 static void foo (p)
      int p;
diff --git a/gcc/testsuite/gcc.dg/winline-10.c b/gcc/testsuite/gcc.dg/winline-10.c
index 2df5adda..f4d92fa 100644
--- a/gcc/testsuite/gcc.dg/winline-10.c
+++ b/gcc/testsuite/gcc.dg/winline-10.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -Winline -fopt-info-optimized-inline=stderr" } */
+/* { dg-options "-Wno-old-style-definition -O2 -Winline -fopt-info-optimized-inline=stderr" } */
 
 struct s { int a; };
 
diff --git a/gcc/testsuite/gcc.dg/wtr-label-1.c b/gcc/testsuite/gcc.dg/wtr-label-1.c
index 78a4d6b..bd31d92 100644
--- a/gcc/testsuite/gcc.dg/wtr-label-1.c
+++ b/gcc/testsuite/gcc.dg/wtr-label-1.c
@@ -2,7 +2,7 @@
    Note, gcc should omit these warnings in system header files.
    Origin: Kaveh R. Ghazi <ghazi@caip.rutgers.edu> 8/24/2000.  */
 /* { dg-do compile } */
-/* { dg-options "-Wtraditional" } */
+/* { dg-options "-Wno-old-style-definition -Wtraditional" } */
 
 enum foo1 { a };
 struct foo2 { int i; };
diff --git a/gcc/testsuite/gcc.dg/wtr-switch-1.c b/gcc/testsuite/gcc.dg/wtr-switch-1.c
index f0381bc..56913ea 100644
--- a/gcc/testsuite/gcc.dg/wtr-switch-1.c
+++ b/gcc/testsuite/gcc.dg/wtr-switch-1.c
@@ -2,7 +2,7 @@
    Note, gcc should omit these warnings in system header files.
    By Kaveh R. Ghazi <ghazi@caip.rutgers.edu> 8/22/2000.  */
 /* { dg-do compile } */
-/* { dg-options "-Wtraditional" } */
+/* { dg-options "-Wno-old-style-definition -Wtraditional" } */
 
 void
 testfunc (l)
diff --git a/gcc/testsuite/gcc.target/i386/excess-precision-3.c b/gcc/testsuite/gcc.target/i386/excess-precision-3.c
index e8e9abc..06f2489 100644
--- a/gcc/testsuite/gcc.target/i386/excess-precision-3.c
+++ b/gcc/testsuite/gcc.target/i386/excess-precision-3.c
@@ -1,7 +1,7 @@
 /* Excess precision tests.  Test excess precision is removed when
    necessary.  */
 /* { dg-do run } */
-/* { dg-options "-O2 -mfpmath=387 -fexcess-precision=standard" } */
+/* { dg-options "-Wno-old-style-definition -O2 -mfpmath=387 -fexcess-precision=standard" } */
 
 #include <float.h>
 #include <stdarg.h>
diff --git a/gcc/testsuite/gcc.target/i386/fma4-256-nmsubXX.c b/gcc/testsuite/gcc.target/i386/fma4-256-nmsubXX.c
index 385cd95..ef0cf41 100644
--- a/gcc/testsuite/gcc.target/i386/fma4-256-nmsubXX.c
+++ b/gcc/testsuite/gcc.target/i386/fma4-256-nmsubXX.c
@@ -1,6 +1,6 @@
 /* { dg-do run } */
 /* { dg-require-effective-target fma4 } */
-/* { dg-options "-O2 -mfma4" } */
+/* { dg-options "-std=gnu17 -O2 -mfma4" } */
 
 #include "fma4-check.h"
 
diff --git a/gcc/testsuite/gcc.target/i386/fma4-nmsubXX.c b/gcc/testsuite/gcc.target/i386/fma4-nmsubXX.c
index c0bce41..82431ea 100644
--- a/gcc/testsuite/gcc.target/i386/fma4-nmsubXX.c
+++ b/gcc/testsuite/gcc.target/i386/fma4-nmsubXX.c
@@ -1,6 +1,6 @@
 /* { dg-do run } */
 /* { dg-require-effective-target fma4 } */
-/* { dg-options "-O0 -mfma4" } */
+/* { dg-options "-std=gnu17 -O0 -mfma4" } */
 
 #include "fma4-check.h"
 
diff --git a/gcc/testsuite/gcc.target/i386/nop-mcount.c b/gcc/testsuite/gcc.target/i386/nop-mcount.c
index a5f8d27..ee3c97f 100644
--- a/gcc/testsuite/gcc.target/i386/nop-mcount.c
+++ b/gcc/testsuite/gcc.target/i386/nop-mcount.c
@@ -1,7 +1,7 @@
 /* Test -mnop-mcount */
 /* { dg-do compile { target { *-*-linux* && nonpic } } } */
 /* { dg-require-effective-target mfentry } */
-/* { dg-options "-pg -mfentry -mrecord-mcount -mnop-mcount" } */
+/* { dg-options "-Wno-old-style-definition -pg -mfentry -mrecord-mcount -mnop-mcount" } */
 /* { dg-final { scan-assembler-not "__fentry__" } } */
 /* Origin: Andi Kleen */
 extern void foobar(char *);
diff --git a/gcc/testsuite/gcc.target/i386/pr102627.c b/gcc/testsuite/gcc.target/i386/pr102627.c
index 8ab9aca..7e14092 100644
--- a/gcc/testsuite/gcc.target/i386/pr102627.c
+++ b/gcc/testsuite/gcc.target/i386/pr102627.c
@@ -1,6 +1,6 @@
 /* PR rtl-optimization/102627 */
 /* { dg-do run } */
-/* { dg-options "-O1" } */
+/* { dg-options "-std=gnu17 -O1" } */
 
 int a, f, l, m, q, c, d, g;
 long b, e;
diff --git a/gcc/testsuite/gcc.target/i386/pr106994.c b/gcc/testsuite/gcc.target/i386/pr106994.c
index 0803311..b0bf985 100644
--- a/gcc/testsuite/gcc.target/i386/pr106994.c
+++ b/gcc/testsuite/gcc.target/i386/pr106994.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-march=skylake -Ofast" } */
+/* { dg-options "-std=gnu17 -march=skylake -Ofast" } */
 
 typedef struct {
   float ymin, ymax;
diff --git a/gcc/testsuite/gcc.target/i386/pr68349.c b/gcc/testsuite/gcc.target/i386/pr68349.c
index 3c38c3a..b8540e4 100644
--- a/gcc/testsuite/gcc.target/i386/pr68349.c
+++ b/gcc/testsuite/gcc.target/i386/pr68349.c
@@ -1,6 +1,6 @@
 /* PR target/68483 */
 /* { dg-do compile } */
-/* { dg-options "-O2" } */
+/* { dg-options "-std=gnu17 -O2" } */
 
 int a, b;
 unsigned long my_strlen();
diff --git a/gcc/testsuite/gcc.target/i386/pr97313.c b/gcc/testsuite/gcc.target/i386/pr97313.c
index 711766b..6167a1f 100644
--- a/gcc/testsuite/gcc.target/i386/pr97313.c
+++ b/gcc/testsuite/gcc.target/i386/pr97313.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fPIE" } */
+/* { dg-options "-std=gnu17 -O2 -fPIE" } */
 /* { dg-require-effective-target pie } */
 
 typedef struct {
diff --git a/gcc/testsuite/gcc.target/i386/pr99454.c b/gcc/testsuite/gcc.target/i386/pr99454.c
index ba3ffe2..f46d56d 100644
--- a/gcc/testsuite/gcc.target/i386/pr99454.c
+++ b/gcc/testsuite/gcc.target/i386/pr99454.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O -w" } */
+/* { dg-options "-std=gnu17 -O -w" } */
 
 struct skb_shared_info {
   short gso_size;
diff --git a/gcc/testsuite/gcc.target/i386/record-mcount.c b/gcc/testsuite/gcc.target/i386/record-mcount.c
index 05b4bcb..52924e0 100644
--- a/gcc/testsuite/gcc.target/i386/record-mcount.c
+++ b/gcc/testsuite/gcc.target/i386/record-mcount.c
@@ -1,6 +1,6 @@
 /* Test -mrecord-mcount */
 /* { dg-do compile { target { *-*-linux* && nonpic } } } */
-/* { dg-options "-pg -mrecord-mcount" } */
+/* { dg-options "-Wno-old-style-definition -pg -mrecord-mcount" } */
 /* { dg-final { scan-assembler "mcount_loc" } } */
 /* Origin: Andi Kleen */
 extern void foobar(char *);
author	Joseph Myers <josmyers@redhat.com>	2024-10-16 16:46:49 +0000
committer	Joseph Myers <josmyers@redhat.com>	2024-10-16 16:48:24 +0000
commit	9fb5348e3021021e82d75e4ca4e6f8d51a34c24f (patch)
tree	d0dd6f1084e834ab9797f5846564f7bcc7bf3bcc /gcc
parent	6756250fcbed4a214c30de94e4ec68ea130528d5 (diff)
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