pschwartz/HPCC-Platform — comment on commit 977240fb31e3e09718a12e0de0997a24dc515045
File: cmake_modules/commonSetup.cmake line 76
By richardkchapman:

The logic should be:
if (both specified)
error
else if (xalan reqested)
set use_xerces on
else if (libxslt requested
set use_libxml2 on
endif