cmake/modules/buildtools/LDGOLD.cmake

   1 if(ENABLE_GOLD)
   2   execute_process(COMMAND ${CMAKE_C_COMPILER} -fuse-ld=gold -Wl,--version ERROR_QUIET OUTPUT_VARIABLE LD_VERSION)
   3   if(LD_VERSION MATCHES "GNU gold")
   4     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fuse-ld=gold")
   5     set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fuse-ld=gold")
   6     set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fuse-ld=gold")
   7     set(LDGOLD_FOUND TRUE)
   8     message(STATUS "Linker: GNU gold")
   9   else()
  10     message(WARNING "GNU gold linker is not available, falling back to default system linker")
  11   endif()
  12 else()
  13   message(STATUS "Linker: Default system linker")
  14 endif()
  15
  16 set(DEFAULT_ENABLE_DEBUGFISSION FALSE)
  17 if(CMAKE_BUILD_TYPE STREQUAL Debug OR
  18    CMAKE_BUILD_TYPE STREQUAL RelWithDebInfo AND
  19    LDGOLD_FOUND)
  20   set(DEFAULT_ENABLE_DEBUGFISSION TRUE)
  21 endif()
  22
  23 include(CMakeDependentOption)
  24 cmake_dependent_option(ENABLE_DEBUGFISSION "Enable Debug Fission support" ON
  25                        "DEFAULT_ENABLE_DEBUGFISSION" OFF)
  26
  27 set(DEBUGFISSION_FOUND FALSE)
  28 if(ENABLE_DEBUGFISSION)
  29   include(TestCXXAcceptsFlag)
  30   check_cxx_accepts_flag(-gsplit-dwarf CXX_ACCEPTS_GSPLIT_DWARF)
  31   if(CXX_ACCEPTS_GSPLIT_DWARF)
  32     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -gsplit-dwarf")
  33     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -gsplit-dwarf")
  34     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gdb-index")
  35     set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gdb-index")
  36     set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gdb-index")
  37     set(DEBUGFISSION_FOUND TRUE)
  38     message(STATUS "Debug Fission enabled")
  39   else()
  40     message(WARNING "Debug Fission is not available")
  41   endif()
  42 endif()