tcg-i386: Perform cmov detection at runtime for 32-bit.

Existing compile-time detection is spotty at best.  Convert
it all to runtime detection instead.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/configure b/configure
index 99c1ec3467..b0c7e542c6 100755
--- a/configure
+++ b/configure
@@ -3086,6 +3086,21 @@ if compile_prog "" "" ; then
     has_environ=yes
 fi
 
+########################################
+# check if cpuid.h is usable.
+
+cpuid_h=no
+cat > $TMPC << EOF
+#include <cpuid.h>
+int main(void) {
+  return 0;
+}
+EOF
+if compile_prog "" "" ; then
+    cpuid_h=yes
+fi
+
+
 ##########################################
 # End of CC checks
 # After here, no more $cc or $ld runs
@@ -3611,6 +3626,10 @@ if test "$has_environ" = "yes" ; then
   echo "CONFIG_HAS_ENVIRON=y" >> $config_host_mak
 fi
 
+if test "$cpuid_h" = "yes" ; then
+  echo "CONFIG_CPUID_H=y" >> $config_host_mak
+fi
+
 if test "$glusterfs" = "yes" ; then
   echo "CONFIG_GLUSTERFS=y" >> $config_host_mak
 fi