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Re: What to do about config.h, etc...
From: |
Kevin Ryde |
Subject: |
Re: What to do about config.h, etc... |
Date: |
Sat, 15 Mar 2003 09:16:45 +1000 |
User-agent: |
Gnus/5.090013 (Oort Gnus v0.13) Emacs/21.2 (i386-pc-linux-gnu) |
Rob Browning <address@hidden> writes:
>
> After playing with the AC_CONFIG_COMMANDS approach for a while, I
> think I may have to revert to my "generate the public header via a
> small C program at build time" approach.
One approach to prefixing everything in config.h is
http://www.gnu.org/software/ac-archive/htmldoc/ac_prefix_config_h.html
Seems slightly excessive to me, since public headers probably need
relatively little of a typical config.h. But covering the whole thing
makes life easier I guess.
> AFAICT there's no way from configure.in to get
> access to the value of something that is only AC_DEFINEd.
Not unless it's also in a cache variable or something. In the case of
AC_HEADER_TIME that's $ac_cv_header_time. (Not sure if that variable
is actually documented. It follows the _cv_ convention though, so
ought to be reasonably stable.)