title: pkg-config 0.26 on OS X Lion seems to be ignoring PKG_CONFIG_PATH
body: <p>I am using pkg-config 0.26 on OS X Lion.</p>
  
  <p>When I <code>echo $PKG_CONFIG_PATH</code>, it seems that the variable is blank.</p>
  
  <p>When I assign into it, e.g. <code>PKG_CONFIG_PATH=/path/to/my/folder/containing/pc/files</code>, and then run <code>pkg-config --list-all</code>, the <code>.pc</code> files in the directory that I ostensibly just added are not found.</p>
  
  <p>I have been side-stepping this issue by soft linking to individual <code>.pc</code> files from <code>/opt/local/share/pkgconfig</code>, but I would prefer to figure out what the right way is.</p>