[KDE/Mac] Review Request 124824: [OS X] FindKDE4Internal.cmake : reintroduce a cmake_minimum_required statement

[Heiko Becker]

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I stumbled upon the same, it's actually a bug in cmake fixed by this commit:


http://www.cmake.org/gitweb?p=cmake.git;a=commit;h=b9ec9392da21a3421e48c6961976060d872faffb

- Heiko Becker


On Aug. 19, 2015, 5:41 nachm., René J.V. Bertin wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/124824/
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> 
> (Updated Aug. 19, 2015, 5:41 nachm.)
> 
> 
> Review request for KDE Software on Mac OS X and kdelibs.
> 
> 
> Repository: kdelibs
> 
> 
> Description
> -------
> 
> The recent removal of the code block from FindKDE4Internal.cmake starting with the `cmake_minimum_required` statement breaks configuring on OS X:
> 
> ```
> -- The C compiler identification is AppleClang 6.0.0.6000057
> -- The CXX compiler identification is AppleClang 6.0.0.6000057
> -- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
> -- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -- works
> -- Detecting C compiler ABI info
> -- Detecting C compiler ABI info - done
> -- Detecting C compile features
> -- Detecting C compile features - done
> -- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++
> -- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -- works
> -- Detecting CXX compiler ABI info
> -- Detecting CXX compiler ABI info - done
> -- Detecting CXX compile features
> -- Detecting CXX compile features - done
> -- Looking for Q_WS_X11
> -- Looking for Q_WS_X11 - not found
> -- Looking for Q_WS_WIN
> -- Looking for Q_WS_WIN - not found
> -- Looking for Q_WS_QWS
> -- Looking for Q_WS_QWS - not found
> -- Looking for Q_WS_MAC
> -- Looking for Q_WS_MAC - found
> -- Looking for QT_MAC_USE_COCOA
> -- Looking for QT_MAC_USE_COCOA - found
> -- Found Qt-Version 4.8.7 (using /opt/local/libexec/qt4/bin/qmake)
> -- Looking for include file pthread.h
> -- Looking for include file pthread.h - found
> -- Looking for pthread_create
> -- Looking for pthread_create - found
> -- Found Threads: TRUE  
> CMake Error at /opt/local/share/cmake-3.2/Modules/FindPkgConfig.cmake:112 (elseif):
>   given arguments:
> 
>     "VERSION_LESS" "3.1"
> 
>   Unknown arguments specified
> Call Stack (most recent call first):
>   /opt/local/share/cmake-3.2/Modules/FindPkgConfig.cmake:501 (_pkgconfig_parse_options)
>   /opt/local/share/cmake-3.2/Modules/FindOpenSSL.cmake:43 (pkg_check_modules)
>   /opt/local/share/apps/cmake/modules/Qt4ConfigDependentSettings.cmake:224 (FIND_PACKAGE)
>   /opt/local/share/apps/cmake/modules/FindQt4.cmake:1207 (INCLUDE)
>   /opt/local/share/apps/cmake/modules/FindKDE4Internal.cmake:425 (find_package)
>   /opt/local/share/cmake-3.2/Modules/FindKDE4.cmake:108 (find_package)
>   CMakeLists.txt:4 (find_package)
> 
> 
> -- Configuring incomplete, errors occurred!
> ```
> 
> The attached patch is the minimum reintroduction of the removed code that allows the cmake procedure to conclude successfully.
> 
> CMake experts might be aware of other ways to address this issue more in line with the reason the block was removed.
> 
> 
> Diffs
> -----
> 
>   cmake/modules/FindKDE4Internal.cmake 7d54b9b 
> 
> Diff: https://git.reviewboard.kde.org/r/124824/diff/
> 
> 
> Testing
> -------
> 
> On OS X 10.9.5 with KDELibs 4.14.11 (v4.14.10-20-g150d983) and CMake 3.2.2 .
> 
> The unmodified code from v4.14.10-20-g150d983 is fine on Linux with cmake 3.0.1 .
> 
> 
> Thanks,
> 
> René J.V. Bertin
> 
>

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