# Copyright (c) 2020-now by the Zeek Project. See LICENSE for details.

## Enable Gold linker if available.

option(USE_GOLD "Use Gold linker" OFF)

set(GOLD_FOUND "no")

if (USE_GOLD)
    if (UNIX AND NOT APPLE AND NOT LLD_PATH)
        execute_process(COMMAND ${CMAKE_CXX_COMPILER} -fuse-ld=gold -Wl,--version ERROR_QUIET
                        OUTPUT_VARIABLE ld_version)
        if ("${ld_version}" MATCHES "GNU gold")
            message(STATUS "Using Gold linker")
            set(GOLD_FOUND "yes")
            set(CMAKE_EXE_LINKER_FLAGS "-fuse-ld=gold ${CMAKE_EXE_LINKER_FLAGS}")
            set(CMAKE_SHARED_LINKER_FLAGS "-fuse-ld=gold ${CMAKE_SHARED_LINKER_FLAGS}")
            set(CMAKE_MODULE_LINKER_FLAGS "-fuse-ld=gold ${CMAKE_MODULE_LINKER_FLAGS}")
        else ()
            message(STATUS "Gold linker not available")
        endif ()
    endif ()
else ()
    message(STATUS "Gold linker usage disabled")
endif ()

set(GOLD_FOUND ${GOLD_FOUND} CACHE BOOL "TRUE if we activated the Linux Gold linker")