bug#14603: 24.3.50; Error while bootstrapping Emacs on Windows

[Eli Zaretskii]

> From: Jan Djärv <jan.h.d@swipnet.se>
> Date: Thu, 13 Jun 2013 20:06:00 +0200
> Cc: Glenn Morris <rgm@gnu.org>,
>  dgutov@yandex.ru,
>  14603@debbugs.gnu.org
> 
> Can't you just set some environment variable in msysconfig.sh and check for 
> it in configure?
> If it isn't set, msysconfig.sh has not been run.

That won't do the job, because "make" sometimes needs to run the
configure script, and when it does, it doesn't go through
msysconfig.sh.  See GNUmakefile and the top-level Makefile.in.

Anyway, people should feel free to change these scripts as they see
fit.  There's no need to wait for me to do it.  It's not like I'm the
best shell scripting or autoconf guru here; far from that.  I crafted
all this stuff together so that maintainers who know nothing about
Windows would be able to develop and maintain it.