On 3/24/2012 12:41 AM, Rolf Eike Beer wrote:
I have seen a strange behaviour on my (openSUSE) Linux host running on AMD64. Sometimes during my Find* module tests libraries in /usr/lib64 were not found. It took me a while until I noticed what was going on there: FIND_LIBRARY_USE_LIB64_PATHS is not set when I used project(... NONE). While this sounds logical maybe the find_library() documentation should be updated to say that some language needs to be enabled for it to properly work.
Sure. Please add a reference to the find_library documentation that points at the FIND_LIBRARY_USE_LIB64_PATHS global property. Then update the documentation of that property to indicate it is set automatically when C, CXX, or Fortran is enabled.
While searching the reason of this behaviour I of course did a "git grep lib64" and found a bunch of Find* modules that manually specify lib64 as suffix. Also most of them also specified "lib" as a path suffix, which is according to my understanding totally unneeded as find_library() will automatically add this suffix. Am I correct? Then I would go in the next days and throw them both out.
The find_library command automatically searches "lib" under each path in CMAKE_SYSTEM_PREFIX_PATH and CMAKE_PREFIX_PATH. Any path that has "lib" in it will first be transformed to "lib64" when the above property is ON. Using "PATH_SUFFIXES lib64 lib" is not necessary to get lib64 to be searched.
Is same is true for find_path() and include suffix?
There is no automatic translation to "include64". However the command will search "include" under each prefix as above so one does not need to write "PATH_SUFFIXES include" to search <prefix>/include with the find_path command. Thanks for working on this cleanup. -Brad -- 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
