>>> On 24-11-2010 at 17:34, in message <ddc068a445e2cc6dcf015e9b84217da0.squir...@webmail.sf-mail.de>, "Rolf Eike Beer" <e...@sf-mail.de> wrote: >> On Wed, Nov 24, 2010 at 6:57 AM, Rolf Eike Beer <e...@sf-mail.de> wrote: >>>> In KDE we have a macro MACRO_WRITE_BASIC_CMAKE_VERSION_FILE() which >>>> helps >>>> with >>>> creating a basic version-info file which should be installed along with >>>> the >>>> Config-file. >>>> It consists of MacroWriteBasicCMakeVersionFile.cmake and >>>> BasicFindPackageVersion.cmake.in which you can find in >>>> http://websvn.kde.org/trunk/KDE/kdelibs/cmake/modules/ . >>> >>> I wonder why you use >>> >>> get_filename_component(_currentListFileDir ${CMAKE_CURRENT_LIST_FILE} >>> PATH) >>> >>> in there instead of CMAKE_CURRENT_LIST_DIR. > >> Probably because CMAKE_CURRENT_LIST_DIR was just invented and is only >> in CMake 2.8.3... get_filename_component works with several versions >> of CMake, and does not require 2.8.3 or later. > > So I think it is _really_ necessary to go through all the CMake > documentation items and add a line about when which feature was added. > > Everyone looks into his local CMake documentation and uses what he finds > in there. And then it breaks on older versions. You currently have no > chance to know what works but to install all older versions and do a > binary search in the documentation. That simply does not scale. > > Eike
That's what CMAKE_MINIMUM_REQUIRED() is for. If you're developing with CMake 2.8.2, and you want to make sure that you don't use any features that are not supported by CMake prior to version 2.8.2, you should put this at the top of your CMakeLists.txt file: CMAKE_MINIMUM_REQUIRED(VERSION 2.8.2) But you do have a point. It would really help people developing CMake files to know whether they can use a given command or not if they want to support, say, CMake 2.6.0. To be honest, the people at Kitware don't make that an easy job, because almost every patch-release contains new features :-( 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
