Can't use -ansi with gcc 4.5.3 on Cygwin, at least through setup
[mmh] / m4 /
drwxr-xr-x   ..
-rw-r--r-- 1882 ndbm.m4
-rw-r--r-- 335 netlibs.m4
-rw-r--r-- 874 readline.m4