configure.cmake

   1 include(CheckCXXSourceCompiles)
   2 include(CheckCXXCompilerFlag)
   3
   4 # VC++ guarantees support for LTCG (LTO's equivalent)
   5 if(NOT WIN32)
   6   # Function required to give CMAKE_REQUIRED_* local scope
   7   function(check_have_lto)
   8     set(CMAKE_REQUIRED_FLAGS -flto)
   9     set(CMAKE_REQUIRED_LIBRARIES -flto -fuse-ld=gold)
  10     check_cxx_source_compiles("int main() { return 0; }" HAVE_LTO)
  11   endfunction(check_have_lto)
  12   check_have_lto()
  13
  14   check_cxx_compiler_flag(-faligned-new COMPILER_SUPPORTS_F_ALIGNED_NEW)
  15 endif(NOT WIN32)