Dear Stephen, thanks a lot for your support! I've tested and your suggestion works!
But, it does not fully resolve my pain :-( I'm slightly scared now because I assumed that cmake would prefer CMAKE_PREFIX_PATH over system libraries. In my understanding, the documentation says CMAKE_PREFIX_PATH is searched first (1). That aspect is quite crucial to me, because I have patched versions of more than 30 standard libraries in CMAKE_PREFIX_PATH. If I can not rely that cmake would use the patched versions, then I may end up having an "interesting" mix of system and patched libraries in my executable :-( (1) https://cmake.org/cmake/help/v3.0/command/find_package.html Thanks a lot and all the best, Mario On 22.03.2018 17:43, Stephen McDowell wrote: > Hi Mario, > > Very sorry, I should have looked more closely! CMAKE_MODULE_PATH is for > libraries that install their own CMake scripts. You are correct, Zlib only > installs a > pkg-config script. However, FindZLIB.cmake doesn’t appear to use that at all > (aka I don’t believe you /need/ to be setting PKG_CONFIG_PATH). You should be > able to get away with setting *ZLIB_ROOT*. So for you I think it would look > like > > cmake .. -DZLIB_ROOT=/data/thirdparty > > FindZLIB.cmake will proceed to look for ZLIB_ROOT/include/zlib.h and look in > ZLIB_ROOT/lib for the library. > > The XXX_ROOT is typically available for any built-in CMake FindXXX.cmake > modules (see hint at bottom: > https://cmake.org/cmake/help/v3.0/module/FindZLIB.html ). > These FindXXX.cmake modules are for this exact scenario: there is a library > that many users want access to that does not install cmake scripts (typically > because the library uses a different build system such as autotools). > > - - - - - > > If you are still having trouble, this is what I used to test this. I didn’t > actually write code that uses it, but I suspect if you *remove* setting of > CMAKE_PREFIX_PATH (I think that’s where your conflict originates from) and > just specify ZLIB_ROOT your problem will be solved (I hope!). > > With a very crude CMakeLists.txt: > > cmake_minimum_required(VERSION 3.0 FATAL_ERROR) > project("find_zlib") > > find_package(ZLIB) > if (ZLIB_FOUND) > message(FATAL_ERROR "Found Zlib:\n- ZLIB_INCLUDE_DIRS: > ${ZLIB_INCLUDE_DIRS}\n- ZLIB_LIBRARIES: ${ZLIB_LIBRARIES}") > else() > message(FATAL_ERROR "Did not find Zlib :/") > endif() > > *Without* setting ZLIB_ROOT: > > $ cmake .. > -- Found ZLIB: /usr/lib/libz.dylib (found version "1.2.8") > CMake Error at CMakeLists.txt:6 (message): > Found Zlib: > - ZLIB_INCLUDE_DIRS: /usr/include > - ZLIB_LIBRARIES: /usr/lib/libz.dylib > > That’s the default Zlib that comes with OS X. However, if I specify > ZLIB_ROOT: > > $ cmake .. -DZLIB_ROOT=/usr/local/Cellar/zlib/1.2.11/ > -- Found ZLIB: /usr/local/Cellar/zlib/1.2.11/lib/libz.dylib (found > version "1.2.11") > CMake Error at CMakeLists.txt:6 (message): > Found Zlib: > - ZLIB_INCLUDE_DIRS: /usr/local/Cellar/zlib/1.2.11/include > - ZLIB_LIBRARIES: /usr/local/Cellar/zlib/1.2.11/lib/libz.dylib > > Let us know if it works or if you still need help! > > -Stephen > > > -- BioDataAnalysis GmbH, Mario Emmenlauer Tel. Buero: +49-89-74677203 Balanstr. 43 mailto: memmenlauer * biodataanalysis.de D-81669 München http://www.biodataanalysis.de/ -- Powered by www.kitware.com Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Kitware offers various services to support the CMake community. For more information on each offering, please visit: CMake Support: http://cmake.org/cmake/help/support.html CMake Consulting: http://cmake.org/cmake/help/consulting.html CMake Training Courses: http://cmake.org/cmake/help/training.html Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Follow this link to subscribe/unsubscribe: https://cmake.org/mailman/listinfo/cmake
