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Re: [PATCH] AC_CONFIG_MACRO_DIRS: improve tracing and add sanity checks

From: Eric Blake
Subject: Re: [PATCH] AC_CONFIG_MACRO_DIRS: improve tracing and add sanity checks
Date: Mon, 12 Nov 2012 16:17:03 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121029 Thunderbird/16.0.2

On 11/12/2012 04:12 PM, Adrian Bunk wrote:
> The problem is not the addition of AC_CONFIG_MACRO_DIRS itself,
> but in the whole picture:
> In the future libtool will use the result of tracing 
> AC_CONFIG_MACRO_DIR_TRACE instead of grep'ing

Correct - so it is essential that AC_CONFIG_MACRO_DIR cause
AC_CONFIG_MACRO_DIR_TRACE to be traced.  That way, both old libtool
(which sed's for the single instance of the old name) and new libtool
(which traces for one or more instances of the new name) will both get
the same answer; and furthermore, that the answer agrees with aclocal
from automake 1.14 on _which_ directory is the primary directory that
can be modified by installing updated m4 files, vs. secondary
directories that can be searched but not modified.  And that's precisely
what I implemented.

Eric Blake   address@hidden    +1-919-301-3266
Libvirt virtualization library

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