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Re: AC_LANG_PROGRAM and -Wstrict-prototypes -Werror

From: Eric Blake
Subject: Re: AC_LANG_PROGRAM and -Wstrict-prototypes -Werror
Date: Wed, 16 Sep 2009 20:56:45 +0000 (UTC)
User-agent: Loom/3.14 (http://gmane.org/)

Robert Millan <rmh <at> aybabtu.com> writes:

> This makes it possible to use AC_LANG_PROGRAM in autoconf scripts that
> have previously included -Wstrict-prototypes and -Werror in their CFLAGS.

This has come up previously on the list.  So far, the answer has always been 
that we currently _don't_ cater to -Werror in CFLAGS during configure, because 
the patches to do so are more invasive than a one-liner, and no one has been 
bothered enough to try and contribute a complete patch.

For this particular proposal, you would be breaking K&R compilation.  Yes, we 
want to move to a default of requiring a C89 compiler, and only supporting K&R 
if the configure.ac author explicitly requested it, but applying your patch 
would break the current default of supporting K&R by default.  For now, I'm 
just inclined to stick with the party line of 'if -Werror hurts, don't use it'.

Eric Blake

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