Merge pull request #2820 from RajalakshmiSR/clang

POWER9: Fix mcpu option with clang

Author: martin-frbg

Makefile.power

@@ -17,24 +17,32 @@ endif
 ifeq ($(CORE), POWER9)
 ifneq ($(C_COMPILER), PGI)
 CCOMMON_OPT += -Ofast -mvsx -fno-fast-math
+ifeq ($(C_COMPILER), GCC)
 ifneq ($(GCCVERSIONGT4), 1)
 $(warning your compiler is too old to fully support POWER9, getting a newer version of gcc is recommended)
 CCOMMON_OPT += -mcpu=power8 -mtune=power8 
 else
 CCOMMON_OPT += -mcpu=power9 -mtune=power9 
 endif
 else
+CCOMMON_OPT += -mcpu=power9 -mtune=power9
+endif
+else
 CCOMMON_OPT += -fast -Mvect=simd -Mcache_align
 endif
 ifneq ($(F_COMPILER), PGI)
 FCOMMON_OPT += -O2 -frecursive -fno-fast-math
+ifeq ($(C_COMPILER), GCC)
 ifneq ($(GCCVERSIONGT4), 1)
 $(warning your compiler is too old to fully support POWER9, getting a newer version of gcc is recommended)
 FCOMMON_OPT += -mcpu=power8 -mtune=power8 
 else
 FCOMMON_OPT += -mcpu=power9 -mtune=power9 
 endif
 else
+FCOMMON_OPT += -mcpu=power9 -mtune=power9
+endif
+else
 FCOMMON_OPT += -O2 -Mrecursive
 endif
 endif