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From: wmperry@aventail.com (William M. Perry)
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Subject: Re: Please unbundle the custom and widget libraries from qgnus.
Date: 22 Sep 1997 08:52:45 -0700
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In-Reply-To: Lars Magne Ingebrigtsen's message of "21 Sep 1997 18:31:24 +0200"
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Lars Magne Ingebrigtsen <larsi@gnus.org> writes:

> Kurt Swanson <ksw@dna.lth.se> writes:
> 
> > My suggestion is putting an "echo How to obtain custom..." line into
> > the makefile.
> 
> I've now made dgnushack check for Custom and then issue instructions
> if it can't find it.

  Have you ever considered using autoconf to create your makefiles for
GNUS?  I've been writing quite a few macros for Emacs/W3's configure.in for 
mucking about with the Emacs someone is trying to use.  I've written
equivalents of the AC_CHECK_LIB macro, so for Emacs/W3 to test whether the
current emacs has a suitable version of the widget library I just do:

AC_EMACS_CHECK_LIB(widget,widget-convert-text,"noecho")
AC_EMACS_CHECK_LIB(wid_edit,widget-convert-text,"noecho")

The 'noecho' stuff is just so routines called by AC_EMACS_CHECK_LIB don't
echo their own 'checking ....' stuff.  There is also AC_EMACS_CHECK_VAR
macro, and AC_EMACS_LISP macro for executing arbitrary lisp.

>>From configure.in:

AC_CHECK_CUSTOM
if test "${CUSTOM}" = "no"; then
AC_MSG_WARN(" ")
AC_MSG_WARN(No usable version of the widget/custom libraries have been)
AC_MSG_WARN(detected on your system.  This version of Emacs/W3 requires)
AC_MSG_WARN(features present in newer versions of the widget library.)
AC_MSG_WARN(" ")
AC_MSG_WARN(Please upgrade to the latest version of custom available.)
AC_MSG_WARN(This package is included with Emacs 20.1 and XEmacs 20.3)
AC_MSG_WARN(or from http://www.dina.kvl.dk/~abraham/custom/)
AC_MSG_WARN(" ")
AC_MSG_WARN(You may still continue but you must modify lisp/Makefile)
AC_MSG_WARN(to have the correct WIDGETDIR setting.)
AC_MSG_WARN(" ")
fi

-Bill P.