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Re: gnu utilities for MVS and CMS


From: Eric Blake
Subject: Re: gnu utilities for MVS and CMS
Date: Sat, 31 Jan 2009 22:52:56 -0700
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.19) Gecko/20081209 Thunderbird/2.0.0.19 Mnenhy/0.7.5.666

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According to Paul Edwards on 1/31/2009 9:34 PM:
>> This is an old version with known security flaws.  Can you try porting
>> the
>> newer m4 1.4.12 release instead, which should still be compilable with
>> just a C89 compiler?
> 
> Ok, I've just tried.  There are both C99 and non-C99 extensions,
> and while I see there are replacement header files for some of
> them, I can't even just copy those header files as a replacement since
> they have @ characters in them, which presumably needs to be processed
> by something else.

All of the @ characters are designed to be replaced by running the
Makefile produced by the ./configure script.  Are you able to run that
script?  If not, can you at least post the resulting config.log to show
how far it got?

> 
> It would be nice if M4 compiled by default on a C89 compiler and
> if the extensions are there for cosmetic or any other purpose,
> that's fine, but the user needs to enable the use of those
> extensions.

It _does_ compile with a C89 compiler, once you have a successful
configure run.  At least, that is the intent of all the replacement headers.

> 
> Since I'm not actually using m4 for any purpose on the mainframe,
> and even if I was, the 1.4 version probably works fine, I'll just stick
> with the back-level, unless there's an interim version before the
> switch to C99 extensions.  I've included what I got up to before
> being forced to use a stdbool.

The replacement <stdbool.h> is designed to be C89 compatible, using values
learned at configure time about your compiler's characteristics and
substituted at make time when renaming lib/stdbool.in.h to lib/stdbool.h.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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