On 3 September 2013 15:46, Brad King <brad.k...@kitware.com> wrote:
>> I though that the recommended way to deal with it is:
>>
>> set_property(TARGET ${prog} PROPERTY LINKER_LANGUAGE CXX)
>
> This tells CMake that your "main" is provided by C++, but IIUC
> it is still Fortran. You should still be able to link with the
> Fortran front-end but need to get the C++ runtime library too.
>
> One way to do this is to tell CMake that the library uses C++
> using the IMPORTED_LINK_INTERFACE_LANGUAGES property on an
> imported target:
>
>
> http://www.cmake.org/cmake/help/v2.8.11/cmake.html#prop_tgt:IMPORTED_LINK_INTERFACE_LANGUAGES
>
> For example:
>
> add_library(externalCxxLib STATIC IMPORTED)
> set_target_properties(externalCxxLib PROPERTIES
> IMPORTED_LOCATION "/path/to/libexternalCxxLib.a"
> IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
> )
> target_link_libraries(myFortranExe externalCxxLib)
>
> This should work if:
>
> - The project enables both Fortan and CXX languages
> - The C++ compiler used is the same as that used to
> build the static library
>
> Then CMake has enough information to add the C++ runtime
> library to the link line when linking to the static library.
That's what I was looking for, but for me instead of adding C++
runtime, C++ compiler (icpc) is used for linking.
So I have the same problem:
undefined reference to `main'
>From what I've read that's intentional(?), CXX has higher LINKER_PREFERENCE.
I've tried changing the preference manually (only for ifort):
set(CMAKE_Fortran_LINKER_PREFERENCE 100)
but it has no effect.
Any ideas?
Marcin
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