check_function_exists(fprintf HAVE_FPRINTF)
check_function_exists(free HAVE_FREE)
check_function_exists(longjmp HAVE_LONGJMP)
+check_function_exists(siglongjmp HAVE_SIGLONGJMP)
check_function_exists(malloc HAVE_MALLOC)
check_function_exists(memcpy HAVE_MEMCPY)
check_function_exists(memset HAVE_MEMSET)