gold_linker.cmake
848705901e68single

gold_linker.cmake
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			# Gold linker
			# ===========

			# Use ld.gold if it is available and isn't disabled explicitly

			# Ref : https://bugs.webkit.org/show_bug.cgi?id=137953
			if ( SPECMICP_LD_GOLD )
			execute_process(
			COMMAND ${CMAKE_C_COMPILER} -fuse-ld=gold -Wl,--version
			ERROR_QUIET
			OUTPUT_VARIABLE LD_VERSION
			)
			if ( "${LD_VERSION}" MATCHES "GNU gold" ) # true if ld-gold available
			if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
			# if clang it needs -flto
			set( SPECMICP_LTO ON )
			endif()
			set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fuse-ld=gold" )
			set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fuse-ld=gold" )
			set( USE_LD_GOLD TRUE CACHE INTERNAL "True if LD gold is used" )

			else ()
			set( USE_LD_GOLD FALSE CACHE INTERNAL "True if LD gold is used" )
			message( WARNING "GNU gold linker isn't available, using the default system linker." )
			endif ()
			endif ()