Better detection of unsupported compiler options.

Should prevent "unsupported -Wl,-z,retpoline" warnings during linking.
ok djm@
This commit is contained in:
Darren Tucker 2018-06-08 13:55:59 +10:00
parent 57379dbd01
commit e1542a8079
1 changed files with 11 additions and 4 deletions

15
aclocal.m4 vendored
View File

@ -25,7 +25,7 @@ int main(int argc, char **argv) {
}
]])],
[
if `grep -i "unrecognized option" conftest.err >/dev/null`
if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
then
AC_MSG_RESULT([no])
CFLAGS="$saved_CFLAGS"
@ -63,7 +63,7 @@ int main(int argc, char **argv) {
}
]])],
[
if `grep -i "unrecognized option" conftest.err >/dev/null`
if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
then
AC_MSG_RESULT([no])
CFLAGS="$saved_CFLAGS"
@ -100,8 +100,15 @@ int main(int argc, char **argv) {
exit(0);
}
]])],
[ AC_MSG_RESULT([yes])
LDFLAGS="$saved_LDFLAGS $_define_flag"],
[
if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
then
AC_MSG_RESULT([no])
LDFLAGS="$saved_LDFLAGS"
else
AC_MSG_RESULT([yes])
LDFLAGS="$saved_LDFLAGS $_define_flag"
fi ],
[ AC_MSG_RESULT([no])
LDFLAGS="$saved_LDFLAGS" ]
)