Add '-Wno-complain-wrong-lang', and use it in 'gcc/testsuite/lib/target-supports.exp:check_compile' and elsewhere

I noticed that GCC/Rust recently lost all LTO variants in torture testing:

     PASS: rust/compile/torture/all_doc_comment_line_blocks.rs   -O0  (test for excess errors)
     PASS: rust/compile/torture/all_doc_comment_line_blocks.rs   -O1  (test for excess errors)
     PASS: rust/compile/torture/all_doc_comment_line_blocks.rs   -O2  (test for excess errors)
    -PASS: rust/compile/torture/all_doc_comment_line_blocks.rs   -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
    -PASS: rust/compile/torture/all_doc_comment_line_blocks.rs   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (test for excess errors)
     PASS: rust/compile/torture/all_doc_comment_line_blocks.rs   -O3 -g  (test for excess errors)
     PASS: rust/compile/torture/all_doc_comment_line_blocks.rs   -Os  (test for excess errors)

Etc.

The reason is that when probing for availability of LTO, we run into:

    spawn [...]/build-gcc/gcc/testsuite/rust/../../gccrs -B[...]/build-gcc/gcc/testsuite/rust/../../ -fdiagnostics-plain-output -frust-incomplete-and-experimental-compiler-do-not-use -flto -c -o lto8274.o lto8274.c
    cc1: warning: command-line option '-frust-incomplete-and-experimental-compiler-do-not-use' is valid for Rust but not for C

For GCC/Rust testing, this flag is (as of recently) defaulted in
'gcc/testsuite/lib/rust.exp:rust_init':

    lappend ALWAYS_RUSTFLAGS "additional_flags=-frust-incomplete-and-experimental-compiler-do-not-use"

A few more "command-line option [...] is valid for [...] but not for [...]"
instances were found in the test suite logs, when more than one language is
involved.

With '-Wno-complain-wrong-lang' used in
'gcc/testsuite/lib/target-supports.exp:check_compile', we get back:

     PASS: rust/compile/torture/all_doc_comment_line_blocks.rs   -O0  (test for excess errors)
     PASS: rust/compile/torture/all_doc_comment_line_blocks.rs   -O1  (test for excess errors)
     PASS: rust/compile/torture/all_doc_comment_line_blocks.rs   -O2  (test for excess errors)
    +PASS: rust/compile/torture/all_doc_comment_line_blocks.rs   -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
    +PASS: rust/compile/torture/all_doc_comment_line_blocks.rs   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (test for excess errors)
     PASS: rust/compile/torture/all_doc_comment_line_blocks.rs   -O3 -g  (test for excess errors)
     PASS: rust/compile/torture/all_doc_comment_line_blocks.rs   -Os  (test for excess errors)

Etc., and in total:

                    === rust Summary for unix ===

    # of expected passes            [-4990-]{+6718+}
    # of expected failures          [-39-]{+51+}

Anything that 'gcc/opts-global.cc:complain_wrong_lang' might do is cut
short by '-Wno-complain-wrong-lang', not just the one 'warning'
diagnostic.  This corresponds to what already exists via
'lang_hooks.complain_wrong_lang_p'.

The 'gcc/opts-common.cc:prune_options' changes follow the same rationale
as PR67640 "driver passes -fdiagnostics-color= always last": we need to
process '-Wno-complain-wrong-lang' early, so that it properly affects
other options appearing before it on the command line.

	gcc/
	* common.opt (-Wcomplain-wrong-lang): New.
	* doc/invoke.texi (-Wno-complain-wrong-lang): Document it.
	* opts-common.cc (prune_options): Handle it.
	* opts-global.cc (complain_wrong_lang): Use it.
	gcc/testsuite/
	* gcc.dg/Wcomplain-wrong-lang-1.c: New.
	* gcc.dg/Wcomplain-wrong-lang-2.c: Likewise.
	* gcc.dg/Wcomplain-wrong-lang-3.c: Likewise.
	* gcc.dg/Wcomplain-wrong-lang-4.c: Likewise.
	* gcc.dg/Wcomplain-wrong-lang-5.c: Likewise.
	* lib/target-supports.exp (check_compile): Use
	'-Wno-complain-wrong-lang'.
	* g++.dg/abi/empty12.C: Likewise.
	* g++.dg/abi/empty13.C: Likewise.
	* g++.dg/abi/empty14.C: Likewise.
	* g++.dg/abi/empty15.C: Likewise.
	* g++.dg/abi/empty16.C: Likewise.
	* g++.dg/abi/empty17.C: Likewise.
	* g++.dg/abi/empty18.C: Likewise.
	* g++.dg/abi/empty19.C: Likewise.
	* g++.dg/abi/empty22.C: Likewise.
	* g++.dg/abi/empty25.C: Likewise.
	* g++.dg/abi/empty26.C: Likewise.
	* gfortran.dg/bind-c-contiguous-1.f90: Likewise.
	* gfortran.dg/bind-c-contiguous-4.f90: Likewise.
	* gfortran.dg/bind-c-contiguous-5.f90: Likewise.
	libgomp/
	* testsuite/libgomp.fortran/alloc-10.f90: Use
	'-Wno-complain-wrong-lang'.
	* testsuite/libgomp.fortran/alloc-11.f90: Likewise.
	* testsuite/libgomp.fortran/alloc-7.f90: Likewise.
	* testsuite/libgomp.fortran/alloc-9.f90: Likewise.
	* testsuite/libgomp.fortran/allocate-1.f90: Likewise.
	* testsuite/libgomp.fortran/depend-4.f90: Likewise.
	* testsuite/libgomp.fortran/depend-5.f90: Likewise.
	* testsuite/libgomp.fortran/depend-6.f90: Likewise.
	* testsuite/libgomp.fortran/depend-7.f90: Likewise.
	* testsuite/libgomp.fortran/depend-inoutset-1.f90: Likewise.
	* testsuite/libgomp.fortran/examples-4/declare_target-1.f90:
	Likewise.
	* testsuite/libgomp.fortran/examples-4/declare_target-2.f90:
	Likewise.
	* testsuite/libgomp.fortran/order-reproducible-1.f90: Likewise.
	* testsuite/libgomp.fortran/order-reproducible-2.f90: Likewise.
	* testsuite/libgomp.oacc-fortran/parallel-dims.f90: Likewise.
	* testsuite/libgomp.fortran/task-detach-6.f90: Remove left-over
	'dg-prune-output'.

16 files changed, 21 insertions, 17 deletions

diff --git a/libgomp/testsuite/libgomp.fortran/alloc-10.f90 b/libgomp/testsuite/libgomp.fortran/alloc-10.f90
index 3eab859..834a2d2 100644
--- a/libgomp/testsuite/libgomp.fortran/alloc-10.f90
+++ b/libgomp/testsuite/libgomp.fortran/alloc-10.f90
@@ -1,5 +1,6 @@
 ! { dg-additional-sources alloc-7.c }
-! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
+! { dg-additional-options -Wno-complain-wrong-lang }
+
 module m
   use omp_lib
   use iso_c_binding
diff --git a/libgomp/testsuite/libgomp.fortran/alloc-11.f90 b/libgomp/testsuite/libgomp.fortran/alloc-11.f90
index b02c68f..e85e2fa 100644
--- a/libgomp/testsuite/libgomp.fortran/alloc-11.f90
+++ b/libgomp/testsuite/libgomp.fortran/alloc-11.f90
@@ -1,5 +1,6 @@
 ! { dg-additional-sources alloc-7.c }
-! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
+! { dg-additional-options -Wno-complain-wrong-lang }
+
 module m
   use omp_lib
   use iso_c_binding
diff --git a/libgomp/testsuite/libgomp.fortran/alloc-7.f90 b/libgomp/testsuite/libgomp.fortran/alloc-7.f90
index 57ecd83..8ef40ff 100644
--- a/libgomp/testsuite/libgomp.fortran/alloc-7.f90
+++ b/libgomp/testsuite/libgomp.fortran/alloc-7.f90
@@ -1,5 +1,6 @@
 ! { dg-additional-sources alloc-7.c }
-! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
+! { dg-additional-options -Wno-complain-wrong-lang }
+
 module m
   use omp_lib
   use iso_c_binding
diff --git a/libgomp/testsuite/libgomp.fortran/alloc-9.f90 b/libgomp/testsuite/libgomp.fortran/alloc-9.f90
index 1da1416..4a1c6a7 100644
--- a/libgomp/testsuite/libgomp.fortran/alloc-9.f90
+++ b/libgomp/testsuite/libgomp.fortran/alloc-9.f90
@@ -1,5 +1,6 @@
 ! { dg-additional-sources alloc-7.c }
-! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
+! { dg-additional-options -Wno-complain-wrong-lang }
+
 module m
   use omp_lib
   use iso_c_binding
diff --git a/libgomp/testsuite/libgomp.fortran/allocate-1.f90 b/libgomp/testsuite/libgomp.fortran/allocate-1.f90
index 1547d2b..c10820e 100644
--- a/libgomp/testsuite/libgomp.fortran/allocate-1.f90
+++ b/libgomp/testsuite/libgomp.fortran/allocate-1.f90
@@ -1,6 +1,6 @@
 ! { dg-do run }
 ! { dg-additional-sources allocate-1.c }
-! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
+! { dg-additional-options -Wno-complain-wrong-lang }
 
 module m
   use omp_lib
diff --git a/libgomp/testsuite/libgomp.fortran/depend-4.f90 b/libgomp/testsuite/libgomp.fortran/depend-4.f90
index 80d00ca..35b47e9 100644
--- a/libgomp/testsuite/libgomp.fortran/depend-4.f90
+++ b/libgomp/testsuite/libgomp.fortran/depend-4.f90
@@ -1,7 +1,7 @@
 ! { dg-additional-options "-fdump-tree-gimple" }
 !
 ! { dg-additional-sources my-usleep.c }
-! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
+! { dg-additional-options -Wno-complain-wrong-lang }
 !
 ! Ensure that 'depend(...: var)' and 'depobj(...) depend(...: var)'
 ! depend on the same variable when 'var' is a pointer
diff --git a/libgomp/testsuite/libgomp.fortran/depend-5.f90 b/libgomp/testsuite/libgomp.fortran/depend-5.f90
index b812b6d..7c3f297 100644
--- a/libgomp/testsuite/libgomp.fortran/depend-5.f90
+++ b/libgomp/testsuite/libgomp.fortran/depend-5.f90
@@ -1,5 +1,5 @@
 ! { dg-additional-sources my-usleep.c }
-! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
+! { dg-additional-options -Wno-complain-wrong-lang }
 
 module m
   implicit none
diff --git a/libgomp/testsuite/libgomp.fortran/depend-6.f90 b/libgomp/testsuite/libgomp.fortran/depend-6.f90
index b5032e9..bb085f2 100644
--- a/libgomp/testsuite/libgomp.fortran/depend-6.f90
+++ b/libgomp/testsuite/libgomp.fortran/depend-6.f90
@@ -1,5 +1,5 @@
 ! { dg-additional-sources my-usleep.c }
-! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
+! { dg-additional-options -Wno-complain-wrong-lang }
 
 module m
   use omp_lib
diff --git a/libgomp/testsuite/libgomp.fortran/depend-7.f90 b/libgomp/testsuite/libgomp.fortran/depend-7.f90
index 771a59c..86e310c 100644
--- a/libgomp/testsuite/libgomp.fortran/depend-7.f90
+++ b/libgomp/testsuite/libgomp.fortran/depend-7.f90
@@ -1,5 +1,5 @@
 ! { dg-additional-sources my-usleep.c }
-! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
+! { dg-additional-options -Wno-complain-wrong-lang }
 
 program main
   implicit none
diff --git a/libgomp/testsuite/libgomp.fortran/depend-inoutset-1.f90 b/libgomp/testsuite/libgomp.fortran/depend-inoutset-1.f90
index 46161c3..6953b59 100644
--- a/libgomp/testsuite/libgomp.fortran/depend-inoutset-1.f90
+++ b/libgomp/testsuite/libgomp.fortran/depend-inoutset-1.f90
@@ -1,5 +1,5 @@
 ! { dg-additional-sources my-usleep.c }
-! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
+! { dg-additional-options -Wno-complain-wrong-lang }
 
 program main
   use omp_lib
diff --git a/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-1.f90 b/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-1.f90
index 5fbf036..fcc7f51 100644
--- a/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-1.f90
+++ b/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-1.f90
@@ -1,6 +1,6 @@
 ! { dg-do run }
 ! { dg-additional-sources ../on_device_arch.c }
-! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
+! { dg-additional-options -Wno-complain-wrong-lang }
 
 module e_53_1_mod
   integer :: THRESHOLD = 20
diff --git a/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-2.f90 b/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-2.f90
index 1bcdac9..d43d9ab 100644
--- a/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-2.f90
+++ b/libgomp/testsuite/libgomp.fortran/examples-4/declare_target-2.f90
@@ -1,6 +1,6 @@
 ! { dg-do run }
 ! { dg-additional-sources ../on_device_arch.c }
-! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
+! { dg-additional-options -Wno-complain-wrong-lang }
 
 program e_53_2
   !$omp declare target (fib)
diff --git a/libgomp/testsuite/libgomp.fortran/order-reproducible-1.f90 b/libgomp/testsuite/libgomp.fortran/order-reproducible-1.f90
index ba416b9..35a030e 100644
--- a/libgomp/testsuite/libgomp.fortran/order-reproducible-1.f90
+++ b/libgomp/testsuite/libgomp.fortran/order-reproducible-1.f90
@@ -1,5 +1,6 @@
 ! { dg-additional-sources my-usleep.c }
-! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
+! { dg-additional-options -Wno-complain-wrong-lang }
+
 program main
   implicit none
   interface
diff --git a/libgomp/testsuite/libgomp.fortran/order-reproducible-2.f90 b/libgomp/testsuite/libgomp.fortran/order-reproducible-2.f90
index 9d72020..c888251 100644
--- a/libgomp/testsuite/libgomp.fortran/order-reproducible-2.f90
+++ b/libgomp/testsuite/libgomp.fortran/order-reproducible-2.f90
@@ -1,5 +1,6 @@
 ! { dg-additional-sources my-usleep.c }
-! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
+! { dg-additional-options -Wno-complain-wrong-lang }
+
 program main
   implicit none
   interface
diff --git a/libgomp/testsuite/libgomp.fortran/task-detach-6.f90 b/libgomp/testsuite/libgomp.fortran/task-detach-6.f90
index 03a3b61..b2c476f 100644
--- a/libgomp/testsuite/libgomp.fortran/task-detach-6.f90
+++ b/libgomp/testsuite/libgomp.fortran/task-detach-6.f90
@@ -1,7 +1,5 @@
 ! { dg-do run }
 
-  ! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
-
 ! Test tasks with detach clause on an offload device.  Each device
 ! thread spawns off a chain of tasks, that can then be executed by
 ! any available thread.
diff --git a/libgomp/testsuite/libgomp.oacc-fortran/parallel-dims.f90 b/libgomp/testsuite/libgomp.oacc-fortran/parallel-dims.f90
index d2050e6..178a66d 100644
--- a/libgomp/testsuite/libgomp.oacc-fortran/parallel-dims.f90
+++ b/libgomp/testsuite/libgomp.oacc-fortran/parallel-dims.f90
@@ -2,8 +2,8 @@
 ! vector_length.
 
 ! { dg-additional-sources parallel-dims-aux.c }
+! { dg-additional-options -Wno-complain-wrong-lang }
 ! { dg-do run }
-! { dg-prune-output "command-line option '-fintrinsic-modules-path=.*' is valid for Fortran but not for C" }
 
 ! { dg-additional-options "-DEXPENSIVE" { target run_expensive_tests } }
 ! { dg-additional-options "-cpp" }