ld: Add -fno-lto to linker tests

LTO can be used to build binutils with

$ CC="gcc -flto -ffat-lto-objects -Wl,--as-needed" CXX="g++ -flto -ffat-lto-objects -Wl,--as-needed" .../configure

But not all linker tests are compatible with LTO.  Pass -fno-lto to CC
to disable LTO on linker tests by default.  -flto is passed explicitly
to CC in linker LTO tests.

	* testsuite/ld-elf/indirect.exp: Append -fno-lto to CC.
	* testsuite/ld-elfvers/vers.exp: Likewise.
	* testsuite/ld-elfweak/elfweak.exp: Likewise.
	* testsuite/ld-ifunc/ifunc.exp: Likewise.
	* testsuite/ld-plugin/lto.exp (no_lto): New.
	Add $no_lto to build pr15146c.so.
	* testsuite/lib/ld-lib.exp (at_least_gcc_version): Filter out
	-Wl,xxx options.
	(check_gcc_plugin_enabled): Likewise.
	(run_ld_link_exec_tests): Prepend -fno-lto to $cflags.
	(run_cc_link_tests): Likewise.

1 files changed, 28 insertions, 22 deletions

diff --git a/ld/testsuite/ld-elfweak/elfweak.exp b/ld/testsuite/ld-elfweak/elfweak.exp
index d319479..85da211 100644
--- a/ld/testsuite/ld-elfweak/elfweak.exp
+++ b/ld/testsuite/ld-elfweak/elfweak.exp
@@ -358,6 +358,12 @@ proc build_exec { test execname objs flags dat dynsymexp symexp} {
     pass $test
 }
 
+# Disable LTO for these tests.
+set cc_cmd "$CC"
+if {[check_lto_available]} {
+   append cc_cmd " -fno-lto"
+}
+
 # Old version of GCC for MIPS default to enabling -fpic
 # and get confused if it is used on the command line.
 if { [istarget mips*-*-*] && ! [at_least_gcc_version 4 3] } then {
@@ -380,20 +386,20 @@ if { [istarget mips*-*-*] && ! [at_least_gcc_version 4 3] } then {
 }
 verbose "Using $picflag to compile PIC code"
 
-if {![ld_compile "$CC $CFLAGS $picflag" $srcdir/$subdir/foo.c $tmpdir/foo.o]
-    || ![ld_compile "$CC $CFLAGS $picflag" $srcdir/$subdir/bar.c $tmpdir/bar.o]
-    || ![ld_compile "$CC $CFLAGS" $srcdir/$subdir/main.c $tmpdir/main.o]
-    || ![ld_link $CC $tmpdir/libbar.so "$shared $tmpdir/bar.o"]
-    || ![ld_compile "$CC $CFLAGS $picflag" $srcdir/$subdir/foo1a.c $tmpdir/foo1a.o]
-    || ![ld_compile "$CC $CFLAGS $picflag" $srcdir/$subdir/foo1b.c $tmpdir/foo1b.o]
-    || ![ld_compile "$CC $CFLAGS $picflag" $srcdir/$subdir/bar1a.c $tmpdir/bar1a.o]
-    || ![ld_compile "$CC $CFLAGS $picflag" $srcdir/$subdir/bar1b.c $tmpdir/bar1b.o]
-    || ![ld_compile "$CC $CFLAGS $picflag" $srcdir/$subdir/bar1c.c $tmpdir/bar1c.o]
-    || ![ld_compile "$CC $CFLAGS $picflag" $srcdir/$subdir/main1.c $tmpdir/main1.o]} then {
+if {![ld_compile "$cc_cmd $CFLAGS $picflag" $srcdir/$subdir/foo.c $tmpdir/foo.o]
+    || ![ld_compile "$cc_cmd $CFLAGS $picflag" $srcdir/$subdir/bar.c $tmpdir/bar.o]
+    || ![ld_compile "$cc_cmd $CFLAGS" $srcdir/$subdir/main.c $tmpdir/main.o]
+    || ![ld_link $cc_cmd $tmpdir/libbar.so "$shared $tmpdir/bar.o"]
+    || ![ld_compile "$cc_cmd $CFLAGS $picflag" $srcdir/$subdir/foo1a.c $tmpdir/foo1a.o]
+    || ![ld_compile "$cc_cmd $CFLAGS $picflag" $srcdir/$subdir/foo1b.c $tmpdir/foo1b.o]
+    || ![ld_compile "$cc_cmd $CFLAGS $picflag" $srcdir/$subdir/bar1a.c $tmpdir/bar1a.o]
+    || ![ld_compile "$cc_cmd $CFLAGS $picflag" $srcdir/$subdir/bar1b.c $tmpdir/bar1b.o]
+    || ![ld_compile "$cc_cmd $CFLAGS $picflag" $srcdir/$subdir/bar1c.c $tmpdir/bar1c.o]
+    || ![ld_compile "$cc_cmd $CFLAGS $picflag" $srcdir/$subdir/main1.c $tmpdir/main1.o]} then {
     unresolved "ELF weak"
-} elseif {![ld_link $CC $tmpdir/libfoo1a.so "$shared $tmpdir/foo1a.o"]
-	  || ![ld_link $CC $tmpdir/libfoo1b.so "$shared $tmpdir/foo1b.o"]
-	  || ![ld_link $CC $tmpdir/libbar1a.so "$shared $tmpdir/bar1a.o $tmpdir/libfoo1a.so"]} then {
+} elseif {![ld_link $cc_cmd $tmpdir/libfoo1a.so "$shared $tmpdir/foo1a.o"]
+	  || ![ld_link $cc_cmd $tmpdir/libfoo1b.so "$shared $tmpdir/foo1b.o"]
+	  || ![ld_link $cc_cmd $tmpdir/libbar1a.so "$shared $tmpdir/bar1a.o $tmpdir/libfoo1a.so"]} then {
     fail "ELF weak"
 } else {
     build_lib "ELF DSO weak func first" libfoo "foo.o bar.o" dso.dsym
@@ -420,10 +426,10 @@ if {![ld_compile "$CC $CFLAGS $picflag" $srcdir/$subdir/foo.c $tmpdir/foo.o]
     build_exec "ELF weak data last DSO common" foo "libfoo1b.so main1.o libbar1a.so" "-Wl,--no-as-needed,-rpath,.,-rpath-link,." weakdata weakdata.dsym ""
 }
 
-if {![ld_compile "$CC $CFLAGS $picflag" $srcdir/$subdir/size_foo.c $tmpdir/size_foo.o]
-    || ![ld_compile "$CC $CFLAGS $picflag" $srcdir/$subdir/size_bar.c $tmpdir/size_bar_s.o]
-    || ![ld_compile "$CC $CFLAGS $picflag -DSIZE_BIG" $srcdir/$subdir/size_bar.c $tmpdir/size_bar.o]
-    || ![ld_compile "$CC $CFLAGS" $srcdir/$subdir/size_main.c $tmpdir/size_main.o]} then {
+if {![ld_compile "$cc_cmd $CFLAGS $picflag" $srcdir/$subdir/size_foo.c $tmpdir/size_foo.o]
+    || ![ld_compile "$cc_cmd $CFLAGS $picflag" $srcdir/$subdir/size_bar.c $tmpdir/size_bar_s.o]
+    || ![ld_compile "$cc_cmd $CFLAGS $picflag -DSIZE_BIG" $srcdir/$subdir/size_bar.c $tmpdir/size_bar.o]
+    || ![ld_compile "$cc_cmd $CFLAGS" $srcdir/$subdir/size_main.c $tmpdir/size_main.o]} then {
     unresolved "ELF weak (size)"
 } else {
     build_lib "ELF DSO small bar (size)" libsize_bar_s "size_bar_s.o" ""
@@ -435,11 +441,11 @@ if {![ld_compile "$CC $CFLAGS $picflag" $srcdir/$subdir/size_foo.c $tmpdir/size_
 verbose "size2"
 run_dump_test $srcdir/$subdir/size2
 
-if {![ld_compile "$CC $CFLAGS $picflag" $srcdir/$subdir/alias.c $tmpdir/alias.o]
-    || ![ld_link $CC $tmpdir/alias.so "$shared $tmpdir/alias.o"]
-    || ![ld_compile "$CC $CFLAGS $NOSANTIZE_CFLAGS" $srcdir/$subdir/aliasmain.c $tmpdir/aliasmain.o]
-    || ![ld_compile "$CC $CFLAGS" $srcdir/$subdir/weakref1.c $tmpdir/weakref1.o]
-    || ![ld_compile "$CC $CFLAGS" $srcdir/$subdir/weakref2.c $tmpdir/weakref2.o]} then {
+if {![ld_compile "$cc_cmd $CFLAGS $picflag" $srcdir/$subdir/alias.c $tmpdir/alias.o]
+    || ![ld_link $cc_cmd $tmpdir/alias.so "$shared $tmpdir/alias.o"]
+    || ![ld_compile "$cc_cmd $CFLAGS $NOSANTIZE_CFLAGS" $srcdir/$subdir/aliasmain.c $tmpdir/aliasmain.o]
+    || ![ld_compile "$cc_cmd $CFLAGS" $srcdir/$subdir/weakref1.c $tmpdir/weakref1.o]
+    || ![ld_compile "$cc_cmd $CFLAGS" $srcdir/$subdir/weakref2.c $tmpdir/weakref2.o]} then {
     unresolved "ELF weak (alias)"
 } else {
     build_exec "ELF weak (alias)" alias "aliasmain.o weakref1.o weakref2.o alias.so" "-Wl,-rpath=.,--no-as-needed" alias "" ""