Enabled building of x86_64 code on Mac OS X (Alexander Graf)

Mac OS X 10.5 supports 64-bit userspace on an x86_64 kernel and
by default uses 32-bit userspace applications, so the detection for
the host architecture fails.

This patch enabled building of x86_64 code on x86_64 capable CPUS
with Mac OS X.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6443 c046a42c-6fe2-441c-8c8c-71466251a162

configure

@@ -243,11 +243,21 @@ oss_lib="-lossaudio"
 Darwin)
 bsd="yes"
 darwin="yes"
+# on Leopard most of the system is 32-bit, so we have to ask the kernel it if we can run 64-bit userspace code
+is_x86_64=`sysctl -n hw.optional.x86_64`
+if [ "$is_x86_64" = "1" ]; then
+    cpu=x86_64
+fi
+if [ "$cpu" = "x86_64" ] ; then
+    OS_CFLAGS="-arch x86_64"
+    LDFLAGS="-arch x86_64"
+else
+    OS_CFLAGS="-mdynamic-no-pic"
+fi
 darwin_user="yes"
 cocoa="yes"
 audio_drv_list="coreaudio"
 audio_possible_drivers="coreaudio sdl fmod"
-OS_CFLAGS="-mdynamic-no-pic"
 OS_LDFLAGS="-framework CoreFoundation -framework IOKit"
 ;;
 SunOS)