cmake HAVE_SETGID examples

gammu/gammu CMakeLists.txt :129 

check_symbol_exists (setgid "unistd.h" HAVE_SETGID)

gammu/gammu smsd/CMakeLists.txt :51 

endif (HAVE_GETPWNAM OR HAVE_GETGRNAM OR HAVE_SETUID OR HAVE_SETGID)