visibility_flag.cmake
d5020bb175cfchloride

visibility_flag.cmake
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			# -fvisibility=hidden
			# ---------------------
			# Change the default visibility of symbols for shared libraries
			#
			# The symbols visibility can be changed int the code
			# using the SPECMICP_DLL_PUBLIC and SPECMICP_DLL_LOCAL macros
			# from specmicp_common/macros.hpp


			# check if the compiler supports it
			check_cxx_compiler_flag( "-fvisibility=hidden" HAVE_VISIBILITY_HIDDEN )
			check_cxx_compiler_flag( "-fvisibility-inlines-hidden" HAVE_VISIBILITY_INLINES_HIDDEN )

			# The following function is used to enable the visibility flags if they exist
			#
			# usage : set_visibility_flag( src1 [src2 [src3 ...]] )
			function( set_visibility_flag )
			if ( HAVE_VISIBILITY_HIDDEN )
			set_property( SOURCE ${ARGN} APPEND_STRING PROPERTY
			COMPILE_FLAGS " -fvisibility=hidden" )
			endif()
			if ( HAVE_VISIBILITY_INLINES_HIDDEN )
			set_property( SOURCE ${ARGN} APPEND_STRING PROPERTY
			COMPILE_FLAGS " -fvisibility-inlines-hidden" )
			endif()
			endfunction( set_visibility_flag )