On Fri, 2009-12-18 at 08:54 -0800, Jed Brown wrote: > On Fri, 18 Dec 2009 10:19:05 +0100, "Marcel Loose" <[email protected]> wrote: > > Hi Roman, > > > > Not in a portable way. I'm not too familiar with Windows, but on Linux > > you can do this when libA is a shared library that has its dependency on > > libB linked in (e.g. ldd libA.so will tell you this). When linking in > > static libraries you're out of luck. > > With shared libraries, you need not and *should not* explicitly link > recursive dependencies. If you have both static and shared libraries, > the output of ldd could be used to find the recursive deps needed to > link statically. This sucks and the logic to determine whether to put > recursive deps in FOO_LIBRARIES ends up going in FindFoo.cmake which is > insane. FWIW, pkg-config has Libs.private for this purpose. > > Finally, it would be nice to easily associate a symbol with a call to > find_library. That is, suppose libA links to libB and libC, but libA > never exposes libB or libC to users. To do the right thing (without > abusing ldd), FindA.cmake needs to try linking with just -lA (which will > work with all shared libs), then try with -lA -lB and -lA -lC before > falling back to -lA -lB -lC (which is required when all libs are > static). A better way which does not have exponential complexity would > be to declare that the symbol "B_Foo" belongs with a libB and "C_Bar" > belongs with a libC. So when linking with -lA fails, libB would be > added exactly when B_Foo is undefined. > > Jed
Hi Jed, Why do you consider explicit linking of recursive dependencies a bad thing? It's superfluous, I agree, but there's no harm in it, right? Best regards, Marcel Loose. _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake
