pb with PKG_CONFIG_PATH & dependencies recursion

[Francois-Xavier KOWALSKI]

Hello pkg-config,

I have noticed a pkg-config behavior difference, that I would qualify as 
a bug: when PKG_CONFIG_PATH is not defined, pkg-config recurses into the 
dependencies to establish complete LIBS & CFLAGS, whereas when 
PKG_CONFIG_PATH is defined, it stops at the first level, not resolving 
flags for dependencies.

For example, I have FFMPEG installed both in /usr (Fedora 8 package 
coming from http://rpm.livna.org) and a custom-made one living into 
/opt/OC (my app's $prefix).

% pkg-config --libs libavformat
-lavformat -lavcodec -lavutil

% env PKG_CONFIG_PATH=/opt/OC/lib64/pkgconfig
pkg-config --libs libavformat
-L/opt/OC/lib64 -lavformat

I have tried with both pkg-config-0.22 that comes from Fedora (w/ 
patches) and using a vanilla 0.23 releases downloaded from your releases 
site. The behavior is the same.

Is this a known issue? If yes, any work-around/patch available? I have 
browsed the mail archive without finding a clue.

Thanks in advance for your help.

-- 
Francois-Xavier "FiX" KOWALSKI     /_ __        Tel:+33 (0)4 76 14 63 27
Communication & Media - EMTS      / //_/        Fax:+33 (0)4 76 14 51 62
Media-Processing Engineering        /      http://www.hp.com/go/opencall
                               i n v e n t