cmake HAVE_SHM examples

gammu/gammu CMakeLists.txt :138 

check_symbol_exists (shmget "sys/shm.h" HAVE_SHM)

gammu/gammu smsd/CMakeLists.txt :148 

endif (HAVE_SHM OR WIN32)

gammu/gammu smsd/CMakeLists.txt :193 

endif (HAVE_SHM OR WIN32)