[PART OF] Fix AVX512 build with older compilers

Dantist · Dantist · commit 7539a1f8b5fd · 2020-12-22T06:44:26.000+02:00
avoids an intrinsic that is missing in gcc < 10. For this target, might trigger another gcc bug on windows that requires up-to-date gcc 8, 9, or 10, or usage of clang. Fixes official-stockfish#2975 closes official-stockfish#2976 No functional change
diff --git a/src/Makefile b/src/Makefile
@@ -415,7 +415,7 @@ endif
 ifeq ($(avx512),yes)
 	CXXFLAGS += -DUSE_AVX512
 	ifeq ($(comp),$(filter $(comp),gcc clang mingw))
-		CXXFLAGS += -mavx512bw
+		CXXFLAGS += -mavx512f -mavx512bw
 	endif
 endif
 
