Utilize compiler AVX512 capability info from c_check when building getarch

diff --git a/Makefile.prebuild b/Makefile.prebuild
index 399db95..4dad74d 100644 (file)
--- a/Makefile.prebuild
+++ b/Makefile.prebuild
@@ -71,7 +71,8 @@ endif
 
 
 getarch : getarch.c cpuid.S dummy $(CPUIDEMU)
-       $(HOSTCC) $(HOST_CFLAGS) $(EXFLAGS) -o $(@F) getarch.c cpuid.S $(CPUIDEMU)
+       avx512=$$(perl c_check - - gcc | grep NO_AVX512); \
+       $(HOSTCC) $(HOST_CFLAGS) $(EXFLAGS) $${avx512:+-D$${avx512}} -o $(@F) getarch.c cpuid.S $(CPUIDEMU)
 
 getarch_2nd : getarch_2nd.c config.h dummy
 ifndef TARGET_CORE