DG/UX R4.20MU05 port of 2.3.0p1

[mouring at etoh.eviladmin.org]

On Wed, 31 Jan 2001, David Dulek wrote:

> DG/UX does not impliment the regcomp, regexec functions.  They suggest using 
> regex and regcmp.  The only place that I see that regexec and regcomp are 
> used is in compat.c.  Can someone help me out with the difference between 
> regex and regexec and the differences between regcmp and regex.  This should 
> also help any other OS that does not have regexec.
> 
> 

regexec/regcomp is the POSIX form of regex/regcmp.  

Take from INSTALL from OpenSSH portable:
[..]
pcre (POSIX Regular Expression library):                          
ftp://ftp.cus.cam.ac.uk/pub/software/programs/pcre/               
                                                                  
Most platforms do not required this.  However older 4.3 BSD do not
have a posix regex library.
[..]


I added supported for pcre (GNU rx works with a tweak or two) after the
change to compat.c was done to allow NeXT to compile.


- Ben