makefiles not parallel building proof

[papillon81]

In times of multi-core machines it is not too uncommon to compile projects like QGIS with "make -j9" or even higher. This does not work, however, as the compile process bails out. Not a big thing, lowering it to -j6 makes it work, but the error shows a build dependency problem in the makefiles that should be fixed.

Here is a part of the log: make -j9 Scanning dependencies of target qgis.d.rast Scanning dependencies of target compile_python_files Scanning dependencies of target svnversion Scanning dependencies of target qgis.g.info Scanning dependencies of target ui Scanning dependencies of target qgis.g.browser Scanning dependencies of target pluginstaller [ 0%] [ 0%] [ 0%] [ 0%] [ 0%] [ 0%] [ 0%] Building C object src/providers/grass/CMakeFiles/qgis.g.info.dir/qgis.g.info.c.o Building C object src/providers/grass/CMakeFiles/qgis.d.rast.dir/qgis.d.rast.c.o Built target svnversion Generating ui_qgsplugininstallerbase.py Generating ui_qgssinglesymboldialogbase.h Generating ui_qgssymbolv2propertiesdialogbase.h Generating ui_qgsformannotationdialogbase.h Scanning dependencies of target mapserverexport [ 0%] [ 0%] [ 0%] [ 0%] Generating ui_qgsplugininstallerfetchingbase.py Generating ui_qgsplugininstallerinstallingbase.py Generating ui_qgsprojectpropertiesbase.h Generating ui_qgsmapserverexportbase.py [ 0%] Building CXX object src/plugins/grass/CMakeFiles/qgis.g.browser.dir/qgis.g.browser.cpp.o [ 0%] Generating ui_qgscontinuouscolordialogbase.h [ 0%] Linking C executable qgis.g.info Generating ui_qgisappbase.h Linking C executable qgis.d.rast [ 0%] Generating ui_qgscomposerbase.h [ 0%] [ 0%] Built target compile_python_files Generating ui_qgspgnewconnectionbase.h [ 0%] [ 0%] Warning: name gridLayout is already used Generating ui_qgsitempositiondialogbase.h [ 0%] Generating resources_rc.py Generating ui_qgsrulebasedrendererv2widget.h [ 0%] [ 0%] [ 0%] Built target qgis.d.rast Built target mapserverexport Generating ui_qgsludialogbase.h [ 0%] Generating ui_qgsplugininstallerpluginerrorbase.py [ 0%] Scanning dependencies of target ftools [ 0%] Scanning dependencies of target gdaltools [ 0%] Generating ui_qgscomposeritemwidgetbase.h Generating ui_qgsplugininstallerrepositorybase.py [ 0%] Generating ui_qgscomposervectorlegendbase.h Generating ui_qgsuniquevaluedialogbase.h [ 0%] [ 0%] [ 0%] Generating resources_rc.py Generating ui_frmAbout.py Generating ui_qgspluginmanagerbase.h [ 0%] [ 0%] [ 0%] Generating resources_rc.py Generating ui_qgsattributeactiondialogbase.h Built target gdaltools [ 0%] [ 0%] Built target qgis.g.info Scanning dependencies of target osmplugin Generating ui_qgspgsourceselectbase.h [ 0%] [ 0%] Generating ui_qgsbookmarksbase.h Scanning dependencies of target ftools_tools Generating ui_OsmFeatureDW.py [ 0%] make[2]: * No rule to make target python/plugins/fTools/ui_frmAbout.py', needed by python/plugins/fTools/tools/CMakeFiles/ftools_tools'. Stop. make[1]: * [python/plugins/fTools/tools/CMakeFiles/ftools_tools.dir/all] Error 2 make[1]: * Waiting for unfinished jobs....