[CMake] Compile all .c source files with the CXX compiler

[Bill Hoffman]

Pau Garcia i Quiles wrote:
> Hello,
> 
> Have you tried PROJECT( myproject CXX ) ?
> 

That will not work.

The only way to make it work now is to use PROPERTIES LANGUAGE CXX on 
each file.   You can create a feature request if you want.

-Bill