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configure: fix compilation on hosts without -fstack-protector-all

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Commit a0f291fc101a7ab3e40850a329da2cc2f2cd1f2d has enabled
-fstack-protector-all on all targets, as the configure test is bogus.
GCC only emits a warning and not an error if this option is not
supported, so the configure scripts doesn't detect the problem.

This patch changes the configure script to try the various flags
with -Werror in addition to catch the possible warnings.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2010-02-06 21:22:19 +01:00
parent 22574c81a1
commit aa527b65d8
1 changed files with 5 additions and 2 deletions
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7
configure vendored
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@ -140,11 +140,14 @@ LDFLAGS="-g $LDFLAGS"
gcc_flags="-Wold-style-declaration -Wold-style-definition -fstack-protector-all" gcc_flags="-Wold-style-declaration -Wold-style-definition -fstack-protector-all"
cat > $TMPC << EOF cat > $TMPC << EOF
int main(void) { } int main(void) { return 0; }
EOF EOF
for flag in $gcc_flags; do for flag in $gcc_flags; do
if compile_prog "$QEMU_CFLAGS" "$flag" ; then echo $testing $flag
if compile_prog "-Werror $QEMU_CFLAGS" "-Werror $flag" ; then
QEMU_CFLAGS="$flag $QEMU_CFLAGS" QEMU_CFLAGS="$flag $QEMU_CFLAGS"
else
echo disable $flag
fi fi
done done