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, 13 insertions, 7 deletions

diff --git a/ld/testsuite/ld-ifunc/ifunc.exp b/ld/testsuite/ld-ifunc/ifunc.exp
index f67808c..63ab18d 100644
--- a/ld/testsuite/ld-ifunc/ifunc.exp
+++ b/ld/testsuite/ld-ifunc/ifunc.exp
@@ -182,24 +182,30 @@ proc contains_ifunc_reloc { binary_file } {
 
 set fails 0
 
+# Disable LTO for these tests.
+set cc_cmd "$CC"
+if {[check_lto_available]} {
+   append cc_cmd " -fno-lto"
+}
+
 # Create the object files, libraries and executables.
-if ![ld_compile "$CC -c -fPIC" "$srcdir/$subdir/prog.c" "tmpdir/shared_prog.o"] {
+if ![ld_compile "$cc_cmd -c -fPIC" "$srcdir/$subdir/prog.c" "tmpdir/shared_prog.o"] {
     fail "Could not create a PIC object file"
     set fails [expr $fails + 1]
 }
-if ![ld_compile "$CC -c $NOPIE_CFLAGS" "$srcdir/$subdir/prog.c" "tmpdir/static_prog.o"] {
+if ![ld_compile "$cc_cmd -c $NOPIE_CFLAGS" "$srcdir/$subdir/prog.c" "tmpdir/static_prog.o"] {
     fail "Could not create a non-PIC object file"
     set fails [expr $fails + 1]
 }
-if ![ld_compile "$CC -c -fPIC -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/shared_ifunc.o"] {
+if ![ld_compile "$cc_cmd -c -fPIC -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/shared_ifunc.o"] {
     fail "Could not create a PIC object file containing an IFUNC symbol"
     set fails [expr $fails + 1]
 }
-if ![ld_compile "$CC -c $NOPIE_CFLAGS -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_ifunc.o"] {
+if ![ld_compile "$cc_cmd -c $NOPIE_CFLAGS -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_ifunc.o"] {
     fail "Could not create a non-PIC object file containing an IFUNC symbol"
     set fails [expr $fails + 1]
 }
-if ![ld_compile "$CC -c -DWITHOUT_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_noifunc.o"] {
+if ![ld_compile "$cc_cmd -c -DWITHOUT_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_noifunc.o"] {
     fail "Could not create an ordinary non-PIC object file"
     set fails [expr $fails + 1]
 }
@@ -207,11 +213,11 @@ if ![ld_assemble $as "$srcdir/ld-elf/empty.s" "tmpdir/empty.o"] {
     fail "Could not create an empty object file"
     set fails [expr $fails + 1]
 }
-if ![ld_compile "$CC -c" "$srcdir/$subdir/test-1.c" "tmpdir/test-1.o"] {
+if ![ld_compile "$cc_cmd -c" "$srcdir/$subdir/test-1.c" "tmpdir/test-1.o"] {
     fail "Could not create test-1.o"
     set fails [expr $fails + 1]
 }
-if ![ld_compile "$CC -fPIC -c" "$srcdir/$subdir/test-2.c" "tmpdir/test-2.o"] {
+if ![ld_compile "$cc_cmd -fPIC -c" "$srcdir/$subdir/test-2.c" "tmpdir/test-2.o"] {
     fail "Could not create test-2.o"
     set fails [expr $fails + 1]
 }