Change the compiler detection in AboutThisBuild.txt (not gcc specific anymore)

Question

Originally reported on Google Code with ID 1441

Right now we assume GCC for the compiler detection in AboutThisBuild.txt. CMake knows
about the compiler version from version 2.8.8 on. I changed the detection that _if_
cmake >=2.8.8 is installed I don't assume GCC anymore but determine the used compiler
and version from CMake. For versions < 2.8.8 I still assume GCC as I don't know an
easy way to achieve the same functionality.

Reported by rinni.net on 2012-06-24 20:29:55

该提问来源于开源项目：Beep6581/RawTherapee

Answer 1

Patch applies, seems to be working properly.
But i think that this unit can be a little simpler.

Reported by lebedev.ri on 2012-06-25 15:52:35