git.m6w6.name Git - awesomized/libmemcached/blob - CMake/CheckVisibility.cmake

   1 configure_define(HAVE_VISIBILITY)
   2
   3 check_flag(-fvisibility=hidden HAVE_VISIBILITY_FLAG)
   4 if(NOT HAVE_VISIBILITY_FLAG)
   5     check_flag(-Wl,-fvisibility=hidden HAVE_VISIBILITY_LINKER_FLAG)
   6 endif()
   7 check_c_source("
   8         __attribute__ ((visibility (\"default\")))
   9         int main(int argc, char **argv) {
  10             return *argv[argc-1];
  11         }"
  12         HAVE_VISIBILITY_ATTR
  13 )
  14
  15 if(HAVE_VISIBILITY_ATTR AND (HAVE_VISIBILITY_FLAG OR HAVE_VISIBILITY_LINKER_FLAG))
  16     if(HAVE_VISIBILITY_LINKER_FLAG)
  17         string(APPEND CMAKE_SHARED_LINKER_FLAGS " -Wl,-fvisibility=hidden")
  18     else()
  19         add_compile_options("-fvisibility=hidden")
  20     endif()
  21     set(HAVE_VISIBILITY 1 CACHE INTERNAL "-fvisibility and __attribute__((visibility(...)))")
  22 endif()