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Add include/libc-misc.h

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Add include/libc-misc.h to provide miscellaneous definitions for both
glibc build and test:

1. Move inhibit_stack_protector to libc-misc.h and add Clang support.
2. Add test_inhibit_stack_protector for glibc testing.
3. Move inhibit_loop_to_libcall to libc-misc.h.
4. Add test_cc_inhibit_loop_to_libcall to handle TEST_CC != CC and
replace inhibit_loop_to_libcall with test_cc_inhibit_loop_to_libcall
in glibc tests.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Co-Authored-By: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Reviewed-by: Sam James <sam@gentoo.org>
This commit is contained in:
H.J. Lu
2024-12-20 05:31:05 +08:00
parent 56cdc529fb
commit 494eb254c3
8 changed files with 203 additions and 67 deletions
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43
configure.ac
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@@ -665,11 +665,14 @@ LIBC_TRY_TEST_CXX_COMMAND([for clang++],
)
LIBC_CONFIG_VAR([have-test-clangxx], [$libc_cv_test_clangxx])
AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector],
[libc_cv_ssp=yes],
[libc_cv_ssp=no])
])
LIBC_TRY_CC_AND_TEST_CC_OPTION([for -fstack-protector],
[-Werror -fstack-protector],
libc_cv_ssp,
[libc_cv_ssp=yes],
[libc_cv_ssp=no],
libc_cv_test_ssp,
[libc_cv_test_ssp=yes],
[libc_cv_test_ssp=no])
AC_CACHE_CHECK(for -fstack-protector-strong, libc_cv_ssp_strong, [dnl
LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector-strong],
@@ -689,6 +692,10 @@ if test "$libc_cv_ssp" = yes; then
no_stack_protector="-fno-stack-protector -DSTACK_PROTECTOR_LEVEL=0"
AC_DEFINE(HAVE_CC_NO_STACK_PROTECTOR)
fi
if test "$libc_cv_test_ssp" = yes; then
AC_DEFINE(HAVE_TEST_CC_NO_STACK_PROTECTOR)
fi
if test "$enable_stack_protector" = yes && test "$libc_cv_ssp" = yes; then
stack_protector="-fstack-protector"
@@ -1506,22 +1513,26 @@ LIBC_TRY_TEST_CC_OPTION([for -ffloat-store],
LIBC_CONFIG_VAR([test-config-cflags-float-store],
[$libc_cv_test_cc_float_store])
AC_CACHE_CHECK(if $CC accepts -fno-tree-loop-distribute-patterns with \
__attribute__ ((__optimize__)), libc_cv_cc_loop_to_function, [dnl
cat > conftest.c <<EOF
conftest_code="
void
__attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns")))
__attribute__ ((__optimize__ (\"-fno-tree-loop-distribute-patterns\")))
foo (void) {}
EOF
libc_cv_cc_loop_to_function=no
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c])
then
libc_cv_cc_loop_to_function=yes
fi
rm -f conftest*])
"
LIBC_TRY_CC_AND_TEST_CC_COMMAND([if __attribute__ ((__optimize__("-fno-tree-loop-distribute-patterns"))) works],
[$conftest_code],
[-c -Werror],
libc_cv_cc_loop_to_function,
[libc_cv_cc_loop_to_function=yes],
[libc_cv_cc_loop_to_function=no],
libc_cv_test_cc_loop_to_function,
[libc_cv_test_cc_loop_to_function=yes],
[libc_cv_test_cc_loop_to_function=no])
if test $libc_cv_cc_loop_to_function = yes; then
AC_DEFINE(HAVE_CC_INHIBIT_LOOP_TO_LIBCALL)
fi
if test $libc_cv_test_cc_loop_to_function = yes; then
AC_DEFINE(HAVE_TEST_CC_INHIBIT_LOOP_TO_LIBCALL)
fi
AC_SUBST(libc_cv_cc_loop_to_function)
LIBC_TRY_CC_AND_TEST_CC_OPTION([for -Wimplicit-fallthrough],