* installing *source* package ‘rcqp’ ...
** package ‘rcqp’ successfully unpacked and MD5 sums checked
checking for pkg-config... /usr/local/bin/pkg-config
ERROR: 'glib-2.0' library not found by pkg-config. Please install it.
ERROR: configuration failed for package ‘rcqp’
* removing ‘/Volumes/SSD-Data/Builds/R-dev-web/QA/Simon/packages/el-capitan-x86_64/results/3.5/rcqp.Rcheck/rcqp’