The cross i586-mingw32msvc-gcc 4.4.4 from Debian Squeeze does not support
__sync_val_compare_and_swap by default.
Using -march=i686 fixes that and should also result in better code.
Signed-off-by: Stefan Weil <s...@weilnetz.de>
---
Maybe this modification is also needed for native gcc-4.4 and older
on Linux i386. If yes, we can move the new script code out of the
MinGW conditional code.
Newer versions of gcc obviously use -march=i686 by default and
don't need the patch, but it also won't do any harm for those
versions.
Stefan
configure | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/configure b/configure
index f2af714..70c2219 100755
--- a/configure
+++ b/configure
@@ -562,6 +562,11 @@ if test "$mingw32" = "yes" ; then
QEMU_CFLAGS="-DWIN32_LEAN_AND_MEAN -DWINVER=0x501 $QEMU_CFLAGS"
# enable C99/POSIX format strings (needs mingw32-runtime 3.15 or later)
QEMU_CFLAGS="-D__USE_MINGW_ANSI_STDIO=1 $QEMU_CFLAGS"
+ if test "$cpu" = "i386"; then
+ # We need something better than i386 for __sync_val_compare_and_swap
+ # and can expect that QEMU will only run on i686 or later.
+ QEMU_CFLAGS="-march=i686 $QEMU_CFLAGS"
+ fi
LIBS="-lwinmm -lws2_32 -liphlpapi $LIBS"
cat > $TMPC << EOF
int main(void) { return 0; }
--
1.7.10.4
