PKG_CONFIG_PATH

[Andreas Enge <andreas@enge.fr>]

Concerning x.org, I am making some progress: The files missing on ftp are 
actually available on the http servers, as found out through #xorg-devel.

Now I am trying to compile a few packages and need to add some 
dependencies. The following happens for xlsatoms during the configure 
phase:

Package xorg-macros was not found in the pkg-config search path.
Perhaps you should add the directory containing `xorg-macros.pc'
to the PKG_CONFIG_PATH environment variable
No package 'xorg-macros' found

The file xorg-macros.pc is contained in the input util-macros, but not 
referenced in PKG_CONFIG_PATH:
export PKG_CONFIG_PATH="/nix/store/ps4d74mwhawnlcbn95lbnwcvz0mc1892-
libxcb-1.8.1/lib/pkgconfig:/nix/store/bq361v58rl2p7dv0npf7hdsnhjlbk2p8-
xz-5.0.4/lib/pkgconfig"

This is because it is not contained in a subdirectory lib/pkgconfig, but in 
share/pkgconfig. Should we add "share/pkgconfig" to the lines
  (set-path-environment-variable "PKG_CONFIG_PATH"
                                 '("lib/pkgconfig" "lib64/pkgconfig")
in guix/build/gnu-build-system.scm in the core-updates branch?

Andreas