Fix cooperlake and sapphire rapids march flags on clang

The march=cooperlake and march=sapphirerapids flags were never getting
added when building with Clang targetting those architectures. Instead
it was falling back to the skylake AVX512 implementation.

Clang added support for these two architectures in Clang 9 and Clang 12,
so introduce new checks for those versions to enable the appropriate
march flag, and fallback to skylake otherwise.

Makefile.system

@@ -384,6 +384,11 @@ GCCMINORVERSIONGTEQ4 := $(shell expr `$(CC) $(GCCDUMPVERSION_PARAM) | cut -f2 -d
 GCCMINORVERSIONGTEQ7 := $(shell expr `$(CC) $(GCCDUMPVERSION_PARAM) | cut -f2 -d.` \>= 7)
 endif
 
+ifeq ($(C_COMPILER), CLANG)
+CLANGVERSIONGTEQ9 := $(shell expr `$(CC) -dumpversion | cut -f1 -d.` \>= 9)
+CLANGVERSIONGTEQ12 := $(shell expr `$(CC) -dumpversion | cut -f1 -d.` \>= 12)
+endif
+
 #
 #  OS dependent settings
 #

Makefile.x86_64

@@ -75,18 +75,31 @@ endif
 ifeq ($(CORE), COOPERLAKE)
 ifndef NO_AVX512
 ifeq ($(C_COMPILER), GCC)
-# cooperlake support was added in 10.1
-ifeq ($(GCCVERSIONGTEQ10)$(GCCMINORVERSIONGTEQ1), 11)
-CCOMMON_OPT += -march=cooperlake
-ifneq ($(F_COMPILER), NAG)
-FCOMMON_OPT += -march=cooperlake
-endif
-else  # gcc not support, fallback to avx512
-CCOMMON_OPT += -march=skylake-avx512
-ifneq ($(F_COMPILER), NAG)
-FCOMMON_OPT += -march=skylake-avx512
-endif
-endif
+ # cooperlake support was added in 10.1
+ ifeq ($(GCCVERSIONGTEQ10)$(GCCMINORVERSIONGTEQ1), 11)
+  CCOMMON_OPT += -march=cooperlake
+  ifneq ($(F_COMPILER), NAG)
+   FCOMMON_OPT += -march=cooperlake
+  endif
+ else  # gcc not support, fallback to avx512
+  CCOMMON_OPT += -march=skylake-avx512
+  ifneq ($(F_COMPILER), NAG)
+   FCOMMON_OPT += -march=skylake-avx512
+  endif
+ endif
+else ifeq ($(C_COMPILER), CLANG)
+ # cooperlake support was added in clang 9
+ ifeq ($(CLANGVERSIONGTEQ9), 1)
+  CCOMMON_OPT += -march=cooperlake
+  ifneq ($(F_COMPILER), NAG)
+   FCOMMON_OPT += -march=cooperlake
+  endif
+ else  # not supported in clang, fallback to avx512
+  CCOMMON_OPT += -march=skylake-avx512
+  ifneq ($(F_COMPILER), NAG)
+   FCOMMON_OPT += -march=skylake-avx512
+  endif
+ endif
 endif
 ifeq ($(OSNAME), CYGWIN_NT)
 CCOMMON_OPT += -fno-asynchronous-unwind-tables
@@ -104,18 +117,31 @@ endif
 ifeq ($(CORE), SAPPHIRERAPIDS)
 ifndef NO_AVX512
 ifeq ($(C_COMPILER), GCC)
-# sapphire rapids support was added in 11
-ifeq ($(GCCVERSIONGTEQ11), 1)
-CCOMMON_OPT += -march=sapphirerapids
-ifneq ($(F_COMPILER), NAG)
-FCOMMON_OPT += -march=sapphirerapids
-endif
-else  # gcc not support, fallback to avx512
-CCOMMON_OPT += -march=skylake-avx512
-ifneq ($(F_COMPILER), NAG)
-FCOMMON_OPT += -march=skylake-avx512
-endif
-endif
+ # sapphire rapids support was added in 11
+ ifeq ($(GCCVERSIONGTEQ11), 1)
+  CCOMMON_OPT += -march=sapphirerapids
+  ifneq ($(F_COMPILER), NAG)
+   FCOMMON_OPT += -march=sapphirerapids
+  endif
+ else  # gcc not support, fallback to avx512
+  CCOMMON_OPT += -march=skylake-avx512
+  ifneq ($(F_COMPILER), NAG)
+   FCOMMON_OPT += -march=skylake-avx512
+  endif
+ endif
+else ifeq ($(C_COMPILER), CLANG)
+ # cooperlake support was added in clang 12
+ ifeq ($(CLANGVERSIONGTEQ12), 1)
+  CCOMMON_OPT += -march=cooperlake
+  ifneq ($(F_COMPILER), NAG)
+   FCOMMON_OPT += -march=cooperlake
+  endif
+ else  # not supported in clang, fallback to avx512
+  CCOMMON_OPT += -march=skylake-avx512
+  ifneq ($(F_COMPILER), NAG)
+   FCOMMON_OPT += -march=skylake-avx512
+  endif
+ endif
 endif
 ifeq ($(OSNAME), CYGWIN_NT)
 CCOMMON_OPT += -fno-asynchronous-unwind-tables

kernel/Makefile

@@ -33,7 +33,7 @@ endif
 ifdef TARGET_CORE
 ifeq ($(TARGET_CORE), SAPPHIRERAPIDS)
  override CFLAGS += -DBUILD_KERNEL -DTABLE_NAME=gotoblas_$(TARGET_CORE)
- ifeq ($(GCCVERSIONGTEQ11), 1) 
+ ifeq (1, $(filter 1,$(GCCVERSIONGTEQ11) $(CLANGVERSIONGTEQ12)))
   override CFLAGS += -march=sapphirerapids
  else 
   override CFLAGS += -march=skylake-avx512 -mavx512f
@@ -48,7 +48,7 @@ ifeq ($(TARGET_CORE), SAPPHIRERAPIDS)
  endif
 else ifeq ($(TARGET_CORE), COOPERLAKE)
  override CFLAGS += -DBUILD_KERNEL -DTABLE_NAME=gotoblas_$(TARGET_CORE)
- ifeq ($(GCCVERSIONGTEQ10), 1) 
+ ifeq (1, $(filter 1,$(GCCVERSIONGTEQ10) $(CLANGVERSIONGTEQ9)))
   override CFLAGS += -march=cooperlake
  else 
   override CFLAGS += -march=skylake-avx512 -mavx512f