Merged requested to merge cristianadam/cmake:precompile-headers into master
Revived Daniel Pfeifer's work on !984 (closed)
The following generators are supported:
- Visual Studio
I've tested it with building Qt Creator, and got a 22% compilation speed increase with MinGW 8.1, 30% with Clang-cl 8.0, and 37% with Visual C++ 2017!
Fixes #1260 (closed)