[CMake] Compaq Fortran 6.1 detection fails under Windows

[Brad King]

Philippe Poilbarbe wrote:
> Hello,
> 
> I am trying to compile fortran code under Windows.
> When the Fortran language is enabled, the fortran checking routine shows 
> the following error:
> 
> Determining if the Fortran compiler works failed with the following output:
>    nmake -f CMakeFiles\cmTryCompileExec.dir/build.make /nologo 
> -L                  CMakeFiles\cmTryCompileExec.dir\build
> Building Fortran object 
> CMakeFiles/cmTryCompileExec.dir/testFortranCompiler.obj
>    C:\PROGRA~1\MICROS~2\DF98\BIN\F90.EXE  -o 
> CMakeFiles/cmTryCompileExec.dir/testFortranCompiler.obj   -c 
> C:\devel\BRAT\CMakeFiles\CMakeTmp\testFortranCompiler.f
> F90: error: Switch '-o' is ambiguous
> NMAKE : fatal error U1077: 'C:\PROGRA~1\MICROS~2\DF98\BIN\F90.EXE' : 
> return code '0x1'
> Stop.
> NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual 
> Studio\VC98\BIN\nmake.exe"' : return code '0x2'
> Stop.
> 
> Did somebody have the same kind of problem and solved it ?
> 
> The fortran compiler if Compaq Fortran 6.1 and it
> does not seem to have a -o option (f90 -help command
> output is below).
> CMake version: 2.4.2

That compiler is not known to CMake.  You'll have to set the variable 
CMAKE_Fortran_COMPILE_OBJECT to teach CMake how to use the compiler. 
Look at the Modules/Platform/Windows-ifort.cmake file in the CMake 
installation for an example.

-Brad