Re: Trunk r117046 fails on systems with older automake

[Eli Zaretskii <eliz@gnu.org>]

> Date: Tue, 06 May 2014 21:00:42 -0700
> From: Paul Eggert <eggert@cs.ucla.edu>
> CC: stephen@xemacs.org, andrewjmoreton@gmail.com, emacs-devel@gnu.org
> 
> Eli Zaretskii wrote:
> >> This particular problem seems isolated to Windows developers
> > It will happen on any system that doesn't have pkg-config installed.
> 
> I was referring to the problem that Andy Moreton reported.  If 
> pkg-config isn't installed, autogen.sh should fail with this diagnostic:
> 
> Your system seems to be missing the following tool(s):
> pkg-config (missing)

Yes, but I don't normally run autogen.sh, I run "make" (and tell other
to do that as well).

> Here the problem and fix is obvious, as Óscar Fuentes already mentioned 
> when he mentioned this diagnostic: he simply installed pkg-config.  In 
> contrast, Andy Moreton reported this diagnostic:
> 
> Checking for pkg-config (need at least version 0.9.0)...
> ok
> Checking for pkg.m4...
> Can't locate Automake/Getopt.pm in @INC
> 
> This is less obvious, but the problem can't be due simply to pkg-config 
> being absent, as pkg-config ran successfully.  It must be something else.

The diagnostic about Getopt.pm is bogus (might be an Automake bug),
the real problem is that pkg.m4 is not where it should be.

> The Automake diagnostic could occur on any O.S. platform, but so far it 
> appears that the only people who've reported it are Microsoft Windows 
> developers.

I suspect that's because (a) the rest use GNU/Linux, and (b) have
pkg-config installed.  The latter is why I didn't see any problems on
Windows.