Description of problem:
I have the following error:
-------------------------------------
[mockbuild@localhost ~]$ pkg-config --exists --print-errors xrandr
Package xext was not found in the pkg-config search path.
Perhaps you should add the directory containing `xext.pc'
to the PKG_CONFIG_PATH environment variable
Package 'xext', required by 'Xrandr', not found
-------------------------------------

I don't know if this is a bug for Xrandr or pkgconfig.

Version-Release number of selected component (if applicable):
libXrandr-devel-1.1.1-3.1
pkgconfig-0.21-1.fc6

How reproducible:
100%

Steps to Reproduce:
1. Install only minimal build environment + 'libXrandr pkgconfig'
2. Try: pkg-config --exists --print-errors xrandr
3.
  
Actual results:
As described above

Expected results:
No error....

Additional info:
xext is in Requires.private