cmake HAVE_ALPHASORT examples

gammu/gammu CMakeLists.txt :111 

check_function_exists (alphasort HAVE_ALPHASORT)

hatari/hatari CMakeLists.txt :234 

check_symbol_exists(alphasort "dirent.h" HAVE_ALPHASORT)

gccxml/gccxml GCC/config_cmake/CMakeLists.txt :470 

CHECK_FUNCTION_EXISTS(alphasort HAVE_ALPHASORT)