From a1d29d6c1d4002a5c7b19eda61d794f4c22538dd Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Sat, 27 Oct 2012 22:19:07 +0100 Subject: [PATCH] configure: use -Wwombat to test whether gcc recognizes -Wno-wombat gcc will silently accept unrecognized -Wno-wombat warning suppression options (it only mentions them if it has to print a compiler warning for some other reason). Since we already run a check for whether gcc recognizes the warning options we use, we can easily make this use the positive sense of the option when checking for support for the suppression option. This doesn't have any effect except that it avoids gcc emitting extra messages about unrecognized command line options when it is printing other warning messages. Signed-off-by: Peter Maydell Reviewed-by: Stefan Weil Reviewed-by: Igor Mitsyanko Signed-off-by: Blue Swirl --- configure | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/configure b/configure index 3685020ffa..9c6ac875a5 100755 --- a/configure +++ b/configure @@ -1169,7 +1169,11 @@ cat > $TMPC << EOF int main(void) { return 0; } EOF for flag in $gcc_flags; do - if compile_prog "-Werror $flag" "" ; then + # Use the positive sense of the flag when testing for -Wno-wombat + # support (gcc will happily accept the -Wno- form of unknown + # warning options). + optflag="$(echo $flag | sed -e 's/^-Wno-/-W/')" + if compile_prog "-Werror $optflag" "" ; then QEMU_CFLAGS="$QEMU_CFLAGS $flag" fi done -- 2.11.0