cmake HAVE_SIGALSTACK examples

ucla-vision/xivo thirdparty/glog/CMakeLists.txt :130 

check_function_exists (sigaltstack HAVE_SIGALSTACK)

chatopera/clause thirdparty/glog/CMakeLists.txt :103 

check_function_exists (sigaltstack HAVE_SIGALSTACK)

feelpp/feelpp feelpp/contrib/glog/CMakeLists.txt :105 

check_function_exists (sigaltstack HAVE_SIGALSTACK)