[CMake] 3.1 can't link my MinGW executables any more.

[Brad King]

On 11/29/2014 06:58 AM, Bill Somerville wrote:
> -lgfortran -lquadmath -lm -lkernel32 -luser32 -lgdi32 -lwinspool
> -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32
> 
> but in 3.1.0-rc2 I get:
> 
> -lquadmath -lm -lkernel32 -luser32 -lgdi32 -lwinspool 
> -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32

The missing -lgfortran may be due to a failure to detect the implicit
libraries linked by the gfortran front-end.  Compare these files:

 CMakeFiles/3.0.2/CMakeFortranCompiler.cmake
 CMakeFiles/3.1.0-rc2/CMakeFortranCompiler.cmake

In particular check the values of

 CMAKE_Fortran_IMPLICIT_LINK_LIBRARIES
 CMAKE_Fortran_IMPLICIT_LINK_DIRECTORIES

recorded in the two files.  Check CMakeFiles/CMakeOutput.log and/or
CMakeFiles/CMakeError.log for information about how the values were
extracted.  Something here may have changed in 3.1.

Thanks,
-Brad