On Sunday 18 November 2012, Andrea Scarpino wrote: > On Saturday 17 November 2012 20:24:42 you wrote: > > Hi, > > > > maybe I am missing something, but here we go: > > > > on 64bit ArchLinux installations, /lib64/ is a symlink to /usr/lib/. > > /bin/ and /usr/bin/ are normal directories, no symlinks. > > Hi Alexander, > that's true, anyway we'll symlink /bin to /usr/bin in the next year. > > > Now if a Config.cmake files is installed into /usr/lib/foo/, and > > references other files of its installations using relative paths from > > its own location to e.g. /usr/bin/ (../../bin/ ), there is breakage. > > Note, that this only applies when $PATH contains a different order than the > default one we ship; which is > PATH="/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin". > > In detail, when /bin is before /usr/bin cmake looks for the binary in /bin. > > > CMake finds FooConfig.cmake in /lib64/foo/FooConfig.cmake (which it seems > > to search before /usr/lib). Then it goes ../../bin/, but doesn't end up > > in /usr/bin/, where e.g. some executable is located, but instead it goes > > to /lib64/foo/../../bin/, which is /bin/, but the expected executable is > > not there, and so the FooConfig.cmake file fails. > > I'm not familiar with the cmake code, but I guess that the different PATH > order I said above cause cmake to take the FooConfig.cmake file from > /lib64 rather than /usr/lib. > > > If so, maybe the best thing to do is to tell the ArchLinux developers to > > set up their symlinks in a different way ? > > Having e.g. /usr/lib64/ point to /usr/lib/ would make it work I think. > > Or if /lib64/ points to /usr/lib/, then maybe /bin/ should also point to > > /usr/bin/. > > We are going to move everything to /usr. As I said above /bin will be > symlinked to /usr/bin in the next year.
what about /include/ ? This typically does not exist, but this will also make the Config.cmake files fail. The Config.cmake files typically reference the include/ subdir, relativ to their own position. If there is no /include/, which is symlinked to /usr/include/, this will fail too. The same for share/ and the other subdirs, but they are somewhat less common. Alex -- 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://public.kitware.com/cgi-bin/mailman/listinfo/cmake-developers
