[CMake] Cross compile + shared libs problem

[Frederik Deweerdt]

On Tue, Mar 25, 2008 at 01:19:52AM +0100, Alexander Neundorf wrote:
> On Tuesday 25 March 2008, Frederik Deweerdt wrote:
> > Hi,
> >
> > I'm trying to cross-compile static libraries for RTEMS. Our project's
> > also targets Linux, where we use shared libraries. We declare the
> > libraries with: add_library(libname srcs...). So STATIC or SHARED is
> > omitted.
> > On RTEMS there are no static libraries, so I was expecting that by
> > setting BUILD_SHARED_LIBS to OFF in the toolchain file, I would get
> > static libraries.
> 
> Does this value end up in the cache ?
> Is it still OFF in the cmake files of your application ?
Hm yes, sorry I missed a trivial set in one of our CMakeLists.txt.
> 
> In Modules/Platform/ you can find an eCos.cmake. eCos is in general quite 
> similar to RTEMS (also RTOS, also one address space, also no shared libs, 
> etc.). It contains:
> # eCos doesn't support shared libs
> SET_PROPERTY(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS FALSE)
> 
> SET(CMAKE_CXX_LINK_SHARED_LIBRARY )
> SET(CMAKE_CXX_LINK_MODULE_LIBRARY )
> SET(CMAKE_C_LINK_SHARED_LIBRARY )
> SET(CMAKE_C_LINK_MODULE_LIBRARY )
> 
> You should also create a RTEMS.cmake (if you haven't done so yet) and use 
> these settings there. If you have problems with this let me know.
> I'd really be happy to add that to cmake cvs.
I first did that, but as I need it done for tomorrow, I ended up
throwing the four lines (a ripoff of eCos.cmake basically), in the
Toolchain file.
I'll be able to send you a cleaned-up patch later this week.

Thanks for your quick answer,
Frederik