Re: guile.m4 for autogen

[Bruce Korb <bkorb@gnu.org>]

Hi Ludovic,

On 08/24/12 06:36, Ludovic Courtès wrote:
>> I'd prefer to use guile.m4, even though it uses guile-config.  It insists.
>> Unfortunately, it does not work.  For me.
>>
>>> configure.ac:140: the top level
>>> configure:14130: error: possibly undefined macro: AC_LIB_LINKFLAGS_FROM_LIBS
>>>        If this token and others are legitimate, please use m4_pattern_allow.
>>>        See the Autoconf documentation.
>>> bootstrap failure:  trapped exit signal
>>> mk-all: line 197:  5702 Killed
>
> As the comment says:
>
>    dnl AC_LIB_LINKFLAGS_FROM_LIBS is defined in gnulib/m4/lib-link.m4 and needs
>    dnl the file gnulib/build-aux/config.rpath.
>
> This means that these two files have to be imported in your project for
> this to work.
>
> I hadn’t noticed that, and I reckon that this is unfortunate.
>
> The change dates back to Feb. 2011, by Bruno, so we’d have to check the
> rationale.

Thank you for the explanation.

I am a big fan of comprehensible error messages and, as you'd guess,
I don't think that "possibly undefined macro: AC_LIB_LINKFLAGS_FROM_LIBS"
qualifies.  Adding an AC_REQUIRE() would likely trigger something more
meaningful.  Having to trace down a comment in an m4 file is not
very friendly.

However, now that I know the issue, obviously I'll add these files to
the list of things I grab from gnulib.  Thank you again.

Regards, Bruce