bug#65323: build failure on Alpine Linux

[Eli Zaretskii <eliz@gnu.org>]

> From: Bruno Haible <bruno@clisp.org>
> Cc: 65323@debbugs.gnu.org
> Date: Thu, 17 Aug 2023 00:59:52 +0200
> 
> Eli Zaretskii wrote:
> 
> > Are we using some feature that is not standard in Awk?
> 
> I don't know, since I am not familiar with the Emacs build system. But if
> you show me the Awk script(s) that the build executes, I might look whether
> it only uses POSIX features [1] and, if so, report a bug to the Alpine
> Linux people.

I can only help with something that is obvious:

  . The following command will find all references to Awk in the
    configure script:

     fgrep -wi awk configure

  . The following command, if invoked from the top-level directory of
    the Emacs source tree, will find several Makefile's in the Emacs
    tree which invoke Awk as part of the build process:

     fgrep -wiR awk . --include="Makefile.in"

    Typically, the couple of directories whose Makefile.in invokes Awk
    also have Awk scripts in them.

Not sure if the above is at all relevant, since the error message you
quoted comes from the build-aux/make-info-dir script, so maybe you
should ignore everything I wrote above, and look just at that script
and the Awk commands it runs.  (It's a poor-man's install-info.)

HTH