Hi, On Sat, Aug 18, 2012 at 12:16 AM, Edgar <edgarreyna...@members.allegro.cc> wrote: > I've already looked at the cmake tutorial, and it isn't that great. It > starts really simple but then goes into really complex things that most > people might not even use. > > Also, there is currently no such thing as 'The Openlayer community' - the > project is unsupported, and no longer in active development due to inactive > development for Allegro 4. So if there is anyone who can help it is this > cmake mailing list, and that's all. > > I am trying to get Openlayer 2pt1 to build with MinGW 4.5 and up, which it > currently doesn't do. I've been able to fix compilation errors, but not > build errors related to cmake. > > I have these problems - > 1) Cmake cannot find ZLIB > 2) Cmake cannot find LIBPNG > 3) There are undefined reference errors during the linking process for the > OpenLayer demos, and I don't know how to properly link the necessary > libraries using cmake. > > There are some .cmake files named FindALLEGRO, and FindFREETYPE, and those > work properly. Do I need to create similar cmake files for zlib and libpng? > > How does cmake find required libraries and link to them?
find_library is used to find libraries, find_file or find_path to find the include directories. Usually those are bundled into a find-module called Find<LibName>.cmake similar to your FindALLEGRO.cmake file. You can configure where the functions search for libs when calling them and also via some special cmake-variables (cmake --help-command find_library gives you more information on that). The find-modules are usually set up in a way that they search the default-installation path of the library on the respective platforms. If users install the lib elsewhere they are required to set the cmake-variables when configuring the project. Andreas -- 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
