Copy the CheckCSourceCompiles module and port it to Fortran.
Extend the FortranOnly test to try using the new module.
Suggested-by: Nicolas Bock <nicolasbock@gmail.com>
Define a "Fortran_FORMAT" target and source file property. Initialize
the target property from a "CMAKE_Fortran_FORMAT" variable. Interpret
values "FIXED" and "FREE" to indicate the source file format. Append
corresponding flags to the compiler command line.
For custom commands in VS2010 Fortran projects the INTDIR variable
is different than in the rest of the solution because Intel
fortran still uses the old VS project files even in VS2010. So,
we replace $(Configuration) directly in the project files. I have also
added a FortranOnly test that tests this feature and is run on any
generator that has Fortran abilities.