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path problem on prefix system

From: Benjamin Motz
Subject: path problem on prefix system
Date: Wed, 11 Apr 2012 16:26:37 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.95 (gnu/linux)


using emacs 24.0.95 on a gentoo-prefix system I have a problem in
opening png-files:

PNG warning: Application built with libpng-1.2.44 but running with 1.5.9 [6 

emacs seems to use the system libpng while it should really use the one
from my prefix system. What can I change to make this work? 

My emacs-build actually was using the correct libpng15-headers from the
prefix-system. Also "ldd `which emacs`" show correctly: => /local1/b_motz01/gentoo/usr/lib/

Maybe a similarly problem: emacs doesn't seem to respect my $PATH
settings, when choosing e.g. the gdb-executable: It uses the version
from the underlying system instead of the first one in $PATH.

Is this a bug?

Any help is appreciated, Benjamin

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