ludo@gnu.org (Ludovic Courtès) writes:

>>> However, this package recipe explicitly adds Autoconf, Automake, and
>>> Libtool as inputs, plus it runs ‘autoreconf’.  So I suspect this is
>>> because upstream’s tarball isn’t self-contained, right?
>>>
>>> Ludo’.
>>
>> Oh, I did that because otherwise I get the following at start of the
>> build phase:
>>
>> (CDPATH="${ZSH_VERSION+.}:" && cd . && /gnu/store/nq6idcqwqc9x6z7g9jxq11a58jqx6w8x-bash-4.3.33/bin/bash /tmp/nix-build-leptonica-1.71.drv-1/leptonica-1.71/config/missing --run autoheader)
>> aclocal.m4:17: warning: this file was generated for autoconf 2.68.
>
> This may be because a .ac, .am, or .m4 file is newer than ‘configure’,
> for instance.  Does any of these get patched, which would explain the
> newer mtime?  Can it be worked around by changing that file’s mtime
> using ‘set-file-time’ or similar?

I get the warning even if I just run "./configure && make", outside of
Guix.  The reason seems to be config/config.h.in being old; touching it
suppresses the warning, and the build still succeeds.  Is it fine this
way?

Updated patch: