refine the mmap_anon configure check, should work this way
[nobug.git] / m4 / 
tree7930303a09664d7047455ba77f4ba68ee159daba
drwxr-xr-x   ..
-rw-r--r-- 10998 acx_pthread.m4
-rw-r--r-- 1839 mmap-anon.m4