cleanup, set '-fvisibility=hidden' flag

Author: mattip

Makefile.system

@@ -486,13 +486,15 @@ LIBSUFFIX = a
 
 ifeq ($(C_COMPILER), CLANG)
 CCOMMON_OPT	+= -DMS_ABI
+CCOMMON_OPT += -fvisibility=hidden
 endif
 
 #Version tests for supporting specific features (MS_ABI, POWER9 intrinsics)
 ifeq ($(GCCVERSIONGT4), 1)
 # GCC Major version > 4
 # It is compatible with MSVC ABI.
 CCOMMON_OPT	+= -DMS_ABI
+CCOMMON_OPT += -fvisibility=hidden
 endif
 
 ifeq ($(GCCVERSIONGTEQ4), 1)

cmake/system.cmake

@@ -742,6 +742,7 @@ if (BUILD_HFLOAT16)
 endif()
 if(NOT MSVC)
 set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} ${CCOMMON_OPT}")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fvisibility=hidden")
 endif()
 # TODO: not sure what PFLAGS is -hpa
 set(PFLAGS "${PFLAGS} ${CCOMMON_OPT} -I${TOPDIR} -DPROFILE ${COMMON_PROF}")

interface/Makefile

@@ -29,7 +29,6 @@
 TOPDIR	= ..
 include $(TOPDIR)/Makefile.system
 
-
 SUPPORT_GEMM3M = 0
 
 ifeq ($(ARCH), x86)

interface/axpy.c

@@ -47,7 +47,6 @@
 #define MULTI_THREAD_MINIMAL  10000
 #endif
 
-
 OPENBLAS_EXPORT
 #ifndef CBLAS