The following issue has been SUBMITTED. ====================================================================== http://public.kitware.com/Bug/view.php?id=14159 ====================================================================== Reported By: Janne Rönkkö Assigned To: ====================================================================== Project: CMake Issue ID: 14159 Category: CMake Reproducibility: always Severity: minor Priority: normal Status: new ====================================================================== Date Submitted: 2013-05-21 11:30 EDT Last Modified: 2013-05-21 11:30 EDT ====================================================================== Summary: qt4_wrap_cpp Creates Incorrect Dependencies When Ninja Generator Is Used Description: When using Ninja as generator qt4_wrap_cpp function generates incorrect dependencies causing all the wrapped source files to be rebuilt when any of the source is changed.
Due to extra dependencies the build with Ninja is much slower than it should be. Steps to Reproduce: Extract the example.tar to get example project and in the build directory run cmake .. -G Ninja ninja -v touch ../A.hpp ninja -v Also B.cpp and B_moc.cxx are build even though those files do not depend on A.hpp. Additional Information: With GNUMake B.cpp and B_moc.cxx is not recompiled after modifying (touching) A.hpp: .../cmake-qt-moc-bug/build $ cmake .. -G 'Unix Makefiles' -- The C compiler identification is GNU 4.8.0 -- The CXX compiler identification is GNU 4.8.0 # ... snip ... -- Found Qt4: /usr/bin/qmake-qt4 (found version "4.8.4") -- Configuring done -- Generating done -- Build files have been written to: /home/janne/tmp/cmake-qt-moc-bug/build .../cmake-qt-moc-bug/build $ make [ 16%] Generating moc_B.cxx [ 33%] Generating moc_A.cxx Scanning dependencies of target mylib [ 50%] Building CXX object CMakeFiles/mylib.dir/A.cpp.o [ 66%] Building CXX object CMakeFiles/mylib.dir/B.cpp.o [ 83%] Building CXX object CMakeFiles/mylib.dir/moc_A.cxx.o [100%] Building CXX object CMakeFiles/mylib.dir/moc_B.cxx.o Linking CXX static library libmylib.a [100%] Built target mylib .../cmake-qt-moc-bug/build $ touch ../A.hpp .../cmake-qt-moc-bug/build $ make [ 16%] Generating moc_A.cxx Scanning dependencies of target mylib [ 33%] Building CXX object CMakeFiles/mylib.dir/A.cpp.o [ 50%] Building CXX object CMakeFiles/mylib.dir/moc_A.cxx.o Linking CXX static library libmylib.a [100%] Built target mylib But with Ninja also B.cpp and B_moc.cpp are rebuilt: janne@kafir ~/tmp/cmake-qt-moc-bug/build $ cmake .. -G Ninja -- The C compiler identification is GNU 4.8.0 -- Check for working C compiler using: Ninja -- Check for working C compiler using: Ninja -- works # ... snip ... -- Found Qt4: /usr/bin/qmake-qt4 (found version "4.8.4") -- Configuring done -- Generating done -- Build files have been written to: /home/janne/tmp/cmake-qt-moc-bug/build .../cmake-qt-moc-bug/build $ ninja -v [1/7] cd /home/janne/tmp/cmake-qt-moc-bug/build && /usr/lib/qt4/bin/moc -I/usr/include/qt4 -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtCore -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -o /home/janne/tmp/cmake-qt-moc-bug/build/moc_B.cxx /home/janne/tmp/cmake-qt-moc-bug/B.hpp [2/7] cd /home/janne/tmp/cmake-qt-moc-bug/build && /usr/lib/qt4/bin/moc -I/usr/include/qt4 -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtCore -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -o /home/janne/tmp/cmake-qt-moc-bug/build/moc_A.cxx /home/janne/tmp/cmake-qt-moc-bug/A.hpp [3/7] /usr/lib/colorgcc/bin/c++ -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NO_DEBUG -I/usr/include/qt4 -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtCore -MMD -MT CMakeFiles/mylib.dir/A.cpp.o -MF "CMakeFiles/mylib.dir/A.cpp.o.d" -o CMakeFiles/mylib.dir/A.cpp.o -c ../A.cpp [4/7] /usr/lib/colorgcc/bin/c++ -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NO_DEBUG -I/usr/include/qt4 -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtCore -MMD -MT CMakeFiles/mylib.dir/B.cpp.o -MF "CMakeFiles/mylib.dir/B.cpp.o.d" -o CMakeFiles/mylib.dir/B.cpp.o -c ../B.cpp [5/7] /usr/lib/colorgcc/bin/c++ -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NO_DEBUG -I/usr/include/qt4 -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtCore -MMD -MT CMakeFiles/mylib.dir/moc_A.cxx.o -MF "CMakeFiles/mylib.dir/moc_A.cxx.o.d" -o CMakeFiles/mylib.dir/moc_A.cxx.o -c moc_A.cxx [6/7] /usr/lib/colorgcc/bin/c++ -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NO_DEBUG -I/usr/include/qt4 -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtCore -MMD -MT CMakeFiles/mylib.dir/moc_B.cxx.o -MF "CMakeFiles/mylib.dir/moc_B.cxx.o.d" -o CMakeFiles/mylib.dir/moc_B.cxx.o -c moc_B.cxx [7/7] : && /usr/bin/cmake -E remove libmylib.a && /usr/bin/ar cr libmylib.a CMakeFiles/mylib.dir/A.cpp.o CMakeFiles/mylib.dir/B.cpp.o CMakeFiles/mylib.dir/moc_A.cxx.o CMakeFiles/mylib.dir/moc_B.cxx.o && /usr/bin/ranlib libmylib.a && : .../cmake-qt-moc-bug/build $ touch ../A.hpp .../cmake-qt-moc-bug/build $ ninja -v [1/6] cd /home/janne/tmp/cmake-qt-moc-bug/build && /usr/lib/qt4/bin/moc -I/usr/include/qt4 -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtCore -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -o /home/janne/tmp/cmake-qt-moc-bug/build/moc_A.cxx /home/janne/tmp/cmake-qt-moc-bug/A.hpp [2/6] /usr/lib/colorgcc/bin/c++ -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NO_DEBUG -I/usr/include/qt4 -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtCore -MMD -MT CMakeFiles/mylib.dir/A.cpp.o -MF "CMakeFiles/mylib.dir/A.cpp.o.d" -o CMakeFiles/mylib.dir/A.cpp.o -c ../A.cpp [3/6] /usr/lib/colorgcc/bin/c++ -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NO_DEBUG -I/usr/include/qt4 -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtCore -MMD -MT CMakeFiles/mylib.dir/B.cpp.o -MF "CMakeFiles/mylib.dir/B.cpp.o.d" -o CMakeFiles/mylib.dir/B.cpp.o -c ../B.cpp [4/6] /usr/lib/colorgcc/bin/c++ -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NO_DEBUG -I/usr/include/qt4 -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtCore -MMD -MT CMakeFiles/mylib.dir/moc_A.cxx.o -MF "CMakeFiles/mylib.dir/moc_A.cxx.o.d" -o CMakeFiles/mylib.dir/moc_A.cxx.o -c moc_A.cxx [5/6] /usr/lib/colorgcc/bin/c++ -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NO_DEBUG -I/usr/include/qt4 -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtCore -MMD -MT CMakeFiles/mylib.dir/moc_B.cxx.o -MF "CMakeFiles/mylib.dir/moc_B.cxx.o.d" -o CMakeFiles/mylib.dir/moc_B.cxx.o -c moc_B.cxx [6/6] : && /usr/bin/cmake -E remove libmylib.a && /usr/bin/ar cr libmylib.a CMakeFiles/mylib.dir/A.cpp.o CMakeFiles/mylib.dir/B.cpp.o CMakeFiles/mylib.dir/moc_A.cxx.o CMakeFiles/mylib.dir/moc_B.cxx.o && /usr/bin/ranlib libmylib.a && : ====================================================================== Issue History Date Modified Username Field Change ====================================================================== 2013-05-21 11:30 Janne Rönkkö New Issue 2013-05-21 11:30 Janne Rönkkö File Added: example.tar ====================================================================== -- 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
