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Bug 334866 - protect against GCC bug 26905 which causes us to create non-PIC DSOs by disabling pragma visibility, r=bryner

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benjamin%smedbergs.us 2006-04-21 16:53:24 +00:00
parent d61fcf4dc5
commit 69f4a40e43
1 changed files with 25 additions and 2 deletions
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27
configure.in
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@ -2623,6 +2623,28 @@ EOF
rm -f conftest.[cs]
])
if test "$ac_cv_visibility_pragma" = "yes"; then
AC_CACHE_CHECK(For gcc visibility bug with class-level attributes (GCC bug 26905),
ac_cv_have_visibility_class_bug,
[cat > conftest.c <<EOF
#pragma GCC visibility push(hidden)
struct __attribute__ ((visibility ("default"))) TestStruct {
static void Init();
};
__attribute__ ((visibility ("default"))) void TestFunc() {
TestStruct::Init();
}
EOF
ac_cv_have_visibility_class_bug=no
if ! ${CXX-g++} ${CXXFLAGS} ${DSO_PIC_CFLAGS} ${DSO_LDOPTS} -S -o conftest.S conftest.c ; then
ac_cv_have_visibility_class_bug=yes
else
if test `grep -c "@PLT" conftest.S` == 0; then
ac_cv_have_visibility_class_bug=yes
fi
fi
# rm -rf conftest.{c,S}
])
AC_CACHE_CHECK(For x86_64 gcc visibility bug with builtins (GCC bug 20297),
ac_cv_have_visibility_builtin_bug,
[cat > conftest.c <<EOF
@ -2637,12 +2659,13 @@ __attribute__ ((visibility ("default"))) void Func() {
}
EOF
ac_cv_have_visibility_builtin_bug=no
if ! ${CC-cc} ${DSO_PIC_CFLAGS} ${DSO_LDOPTS} -O2 -o conftest.so conftest.c >/dev/null 2>&1; then
if ! ${CC-cc} ${CFLAGS} ${DSO_PIC_CFLAGS} ${DSO_LDOPTS} -O2 -o conftest.so conftest.c >/dev/null 2>&1; then
ac_cv_have_visibility_builtin_bug=yes
fi
rm -f conftest.{c,so}
])
if test "$ac_cv_have_visibility_builtin_bug" = "no"; then
if test "$ac_cv_have_visibility_builtin_bug" = "no" -a \
"$ac_cb_have_visibility_class_bug" = "no"; then
VISIBILITY_FLAGS='-I$(DIST)/include/system_wrappers -include $(topsrcdir)/config/gcc_hidden.h'
WRAP_SYSTEM_INCLUDES=1
else