create *.lib implib for windows dll with mingw-w64

I'd like to instruct CMake to instruct mingw-w64 to create a *.lib for the shared *.dll C library

I'm trying to cross compile a lapack.dll (and the accompanying lapack.lib) from the lapack project https://github.com/Reference-LAPACK/lapack The resulting shared lib should be usable by MSVC (so I don't need to setup a fortran compiler on Windows). MSVC needs a *.lib implib to link to the dll

I found the flag -Wl,--out-implib,libshared_dll.lib from the following link http://gernotklingler.com/blog/creating-using-shared-libraries-different-compilers-different-operating-systems/

I don't want to set custom CMAKE_Fortran_COMPILE_FLAGS if I can avoid it. Also the created lapack-config.cmake file should link to the *.lib file instead of the now generated *.dll.a file.