Change dcl of program_name so it doesn't conflict with the ubiquitous char* one.
-rw-r--r-- 2884 Makefile.in
-rw-r--r-- 439 configure.in
drwxr-xr-x - lib
drwxr-xr-x - m4
-rw-r--r-- 160710 regex.c
-rw-r--r-- 18923 regex.h