[Qemu-devel] [PATCH for-2.0] configure: use do_cc when checking for -fstack-protector support

[Peter Maydell]

MacOSX clang silently swallows unrecognized -f options when doing a link
with '-framework' also on the command line, so to detect support for
the various -fstack-protector options we must do a plain .c to .o compile,
not a complete compile-and-link.

Signed-off-by: Peter Maydell <address@hidden>
---
This should be a pretty safe change and it prevents clang/MacOSX
builds from spewing a warning on every C file compilation, so I'd
like to get it into 2.0.

 configure | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure b/configure
index eb0e7bb..c85475f 100755
--- a/configure
+++ b/configure
@@ -1448,7 +1448,7 @@ done
 if test "$stack_protector" != "no" ; then
   gcc_flags="-fstack-protector-strong -fstack-protector-all"
   for flag in $gcc_flags; do
-    if compile_prog "-Werror $flag" "" ; then
+    if do_cc $QEMU_CFLAGS -Werror $flag -c -o $TMPO $TMPC ; then
       QEMU_CFLAGS="$QEMU_CFLAGS $flag"
       LIBTOOLFLAGS="$LIBTOOLFLAGS -Wc,$flag"
       break
-- 
1.8.5.4