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Re: ${prefix} expansion broken?

From: Ralf Wildenhues
Subject: Re: ${prefix} expansion broken?
Date: Wed, 30 Aug 2006 09:39:43 +0200
User-agent: Mutt/1.5.12 (2006-08-10)

Hello Pat,

* Pat Suwalski wrote on Wed, Aug 30, 2006 at 06:51:28AM CEST:
> My has the following snippet:
> -------------------------------------------------------
> PKGDATADIR=`eval echo "${datadir}/$PACKAGE"`
>                    [The directory where our data will be installed])
> -------------------------------------------------------

This is broken; please read:

> With automake-1.7 it properly expanded. With automake-1.9, my config.h
> has the following in it:

This is likely caused by an upgrade to Autoconf-2.60, not the Automake
upgrade; this part of autoconf/NEWS explains it:

| ** Directory variables adjusted to recent changes in the GNU Coding Standards.
|   The following directory variables are new:
|     datarootdir   read-only architecture-independent data root [PREFIX/share]
|     localedir     locale-specific message catalogs [DATAROOTDIR/locale]
|     docdir        documentation root [DATAROOTDIR/doc/PACKAGE]
|     htmldir       html documentation [DOCDIR]
|     dvidir        dvi documentation [DOCDIR]
|     pdfdir        pdf documentation [DOCDIR]
|     psdir         ps documentation [DOCDIR]
|   The following variables have new default values:
|     datadir       read-only architecture-independent data [DATAROOTDIR]
|     infodir       info documentation [DATAROOTDIR/info]
|     mandir        man documentation [DATAROOTDIR/man]

> I know the autoconf manual says:
> "A corollary is that you should not use these variables except in
> Makefiles.

> But is that really the best solution?

The links provided above point out several possible solutions.  Another
recent one is the Gnulib module `configmake':

Whatever suits you best, the one you've used so far is not supported and
will eventually break again when some other variable change is

Hope that helps.


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