Qt 6.6.7 error using ninja build and cmake

[pip010]

I am building Qt from source (github) tag: 6.6.7

Previously, using 6.5.0 it went smoothly, however now I face this error without a clue what might have caused it:

ninja : error : build.ninja:2207: multiple outputs aren't (yet?) supported by depslog; bring this up on the mailing list if it affects you

Here is my cmake Extern_Project script, which worked fine with 6.5:

set(QT_EXTERN_DIR qt-6.7.0)
set(QT_PREFIX qt)
set(QT_EXTERN_BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/${QT_PREFIX}/src/${QT_EXTERN_DIR}" )
set(QT_EXTERN_BUILD_DIR "${CMAKE_CURRENT_BINARY_DIR}/${QT_PREFIX}/src/${QT_EXTERN_DIR}-build" )

ExternalProject_Add(${QT_EXTERN_DIR}
  SOURCE_DIR ${QT_EXTERN_BINARY_DIR}
  TIMEOUT 2700 # 45 minutes
  PREFIX ${QT_PREFIX}
  CONFIGURE_COMMAND ${QT_EXTERN_BINARY_DIR}/Configure.bat
  -release
  -c++std c++17  
  -shared
  -opensource 
  -confirm-license
  -widgets
  -gui
  -opengl dynamic
  #-opengles3
  #-mediaplayer-backend wmf
  -skip qt5compat 
  -skip qt3d 
  -skip qtdatavis3d 
  -skip qtactiveqt 
  -skip qtconnectivity 
  -skip qtcharts 
  -skip qtdatavis3d 
  -skip qtcoap 
  -skip qtdoc 
  -skip qtgrpc 
  -skip qthttpserver 
  -skip qtlanguageserver 
  -skip qtlottie 
  -skip qtmqtt 
  -skip qtnetworkauth 
  -skip qtopcua 
  -skip qtlocation 
  -skip qtpositioning 
  -skip qtquick3dphysics 
  -skip qtquickeffectmaker 
  -skip qtquicktimeline 
  -skip qtremoteobjects 
  -skip qtscxml 
  -skip qtsensors 
  -skip qtscript 
  -skip qtserialbus 
  -skip qtserialport 
  -skip qtspeech 
  -skip qtvirtualkeyboard 
  -skip qtsvg 
  -skip qtwayland 
  -skip qtwebchannel 
  -skip qtwebengine 
  -skip qtwebsockets 
  -skip qtwebview
  -skip qtquick3d
  -skip qtuiotouch
  -skip qtgraphs
  -no-openssl
  -no-dbus
  -no-gstreamer
  -nomake examples
  -nomake tests
  -nomake benchmarks
  BUILD_COMMAND cmake --build . --parallel
  INSTALL_COMMAND ninja install

)

Would love any hint how to diagnose the issue!

[cristian-adam]

My ninja.exe version: 1.8.2

Ninja is too old. At https://github.com/ninja-build/ninja/issues/1184 we can see that the fix went in version 1.10.0.

I think Qt CMake code only checks for CMake versions, not for ninja versions. It would be a good suggestion at https://bugreports.qt.io/ so that people won't spend time with weird errors.

[SGaist]

Hi,

Did you change ninja/cmake version ?
Do you have the same issue if not using the parallel option (or just setting it to 1 for the experiment) ?

[pip010]

@SGaist Just did that and no difference.

Here is the section of the build.ninja that seems problematic, though nothing specific about that I ca see:

'''
#############################################

Custom command for qtbase\src\tools\rcc\rcc_autogen\timestamp

build qtbase\src\tools\rcc\rcc_autogen\timestamp qtbase\src\tools\rcc\rcc_autogen\mocs_compilation.cpp | ${cmake_ninja_workdir}qtbase\src\tools\rcc\rcc_autogen\timestamp ${cmake_ninja_workdir}qtbase\src\tools\rcc\rcc_autogen\mocs_compilation.cpp: CUSTOM_COMMAND qtbase\bin\moc.exe || qtbase\bin\Qt6Core.dll qtbase\bin\cmake_automoc_parser.exe qtbase\bin\moc.exe qtbase\bin\syncqt.exe qtbase\lib\Qt6BundledPcre2.lib qtbase\lib\Qt6BundledZLIB.lib qtbase\qmodule_pri qtbase\src\3rdparty\zlib\ZlibPrivate qtbase\src\3rdparty\zlib\ZlibPrivate_sync_headers qtbase\src\corelib\Core_autogen qtbase\src\corelib\Core_autogen_timestamp_deps qtbase\src\corelib\Core_lib_pri qtbase\src\corelib\Core_sync_headers qtbase\src\tools\bootstrap\Bootstrap.lib qtbase\src\tools\rcc\rcc_autogen_timestamp_deps
COMMAND = C:\WINDOWS\system32\cmd.exe /C "cd /D D:\X\ext_nena38_build\qt\src\qt-6.7.0-build\qtbase\src\tools\rcc && "C:\Program Files\CMake\bin\cmake.exe" -E cmake_autogen D:/X/ext_nena38_build/qt/src/qt-6.7.0-build/qtbase/src/tools/rcc/CMakeFiles/rcc_autogen.dir/AutogenInfo.json Release && "C:\Program Files\CMake\bin\cmake.exe" -E touch D:/X/ext_nena38_build/qt/src/qt-6.7.0-build/qtbase/src/tools/rcc/rcc_autogen/timestamp && "C:\Program Files\CMake\bin\cmake.exe" -E cmake_transform_depfile Ninja gccdepfile D:/X/ext_nena38_build/qt/src/qt-6.7.0 D:/X/ext_nena38_build/qt/src/qt-6.7.0/qtbase/src/tools/rcc D:/X/ext_nena38_build/qt/src/qt-6.7.0-build D:/X/ext_nena38_build/qt/src/qt-6.7.0-build/qtbase/src/tools/rcc D:/X/ext_nena38_build/qt/src/qt-6.7.0-build/qtbase/src/tools/rcc/rcc_autogen/deps D:/X/ext_nena38_build/qt/src/qt-6.7.0-build/CMakeFiles/d/5261626427453b45d46e288ec291c360a2d0440e4f5913fc8c2f34379b5ddbe1.d"
DESC = Automatic MOC for target rcc
depfile = CMakeFiles\d\5261626427453b45d46e288ec291c360a2d0440e4f5913fc8c2f34379b5ddbe1.d
deps = gcc
restat = 1
'''

I will go and inspect ay difference in the build artifacts between my successful 6.5 and 6.7.

My cmake version: 3.29.2

My ninja.exe version: 1.8.2

[pip010]

@pip010

I compared the line in question between 6.5 and 6.7:

build qtbase\src\tools\rcc\rcc_autogen\timestamp qtbase\src\tools\rcc\rcc_autogen\mocs_compilation_Release.cpp qtbase\src\tools\rcc\rcc_autogen\mocs_compilation_Debug.cpp | ${cmake_ninja_workdir}qtbase\src\tools\rcc\rcc_autogen\timestamp ${cmake_ninja_workdir}qtbase\src\tools\rcc\rcc_autogen\mocs_compilation_Release.cpp ${cmake_ninja_workdir}qtbase\src\tools\rcc\rcc_autogen\mocs_compilation_Debug.cpp: CUSTOM_COMMAND qtbase\bin\moc.exe || qtbase\bin\Qt6Core.dll qtbase\bin\cmake_automoc_parser.exe qtbase\bin\moc.exe qtbase\src\3rdparty\zlib\ZlibPrivate$:Release qtbase\src\corelib\Core_autogen_timestamp_deps$:Release qtbase\src\corelib\Core_sync_headers$:Release qtbase\src\tools\rcc\rcc_autogen_timestamp_deps$:Release
  COMMAND = cmd.exe /C "cd /D D:\X\ext_nena37_build\qt\src\qt-6.5.0-build\qtbase\src\tools\rcc && "C:\Program Files\CMake\bin\cmake.exe" -E cmake_autogen D:/X/ext_nena37_build/qt/src/qt-6.5.0-build/qtbase/src/tools/rcc/CMakeFiles/rcc_autogen.dir/AutogenInfo.json Release && "C:\Program Files\CMake\bin\cmake.exe" -E cmake_autogen D:/X/ext_nena37_build/qt/src/qt-6.5.0-build/qtbase/src/tools/rcc/CMakeFiles/rcc_autogen.dir/AutogenInfo.json Debug && "C:\Program Files\CMake\bin\cmake.exe" -E touch D:/X/ext_nena37_build/qt/src/qt-6.5.0-build/qtbase/src/tools/rcc/rcc_autogen/timestamp && "C:\Program Files\CMake\bin\cmake.exe" -E cmake_transform_depfile "Ninja Multi-Config" gccdepfile D:/X/ext_nena37_build/qt/src/qt-6.5.0 D:/X/ext_nena37_build/qt/src/qt-6.5.0/qtbase/src/tools/rcc D:/X/ext_nena37_build/qt/src/qt-6.5.0-build D:/X/ext_nena37_build/qt/src/qt-6.5.0-build/qtbase/src/tools/rcc D:/X/ext_nena37_build/qt/src/qt-6.5.0-build/qtbase/src/tools/rcc/rcc_autogen/deps D:/X/ext_nena37_build/qt/src/qt-6.5.0-build/CMakeFiles/d/45a22ff0e738ef5bd37d29dd69928286296b9df5ecffbccf36c72a226d7c108c.d"
  DESC = Automatic MOC for target rcc
  depfile = D:/X/ext_nena37_build/qt/src/qt-6.5.0-build/CMakeFiles/d/45a22ff0e738ef5bd37d29dd69928286296b9df5ecffbccf36c72a226d7c108c.d
  restat = 1

qt 6.7:

build qtbase\src\tools\rcc\rcc_autogen\timestamp qtbase\src\tools\rcc\rcc_autogen\mocs_compilation_Release.cpp qtbase\src\tools\rcc\rcc_autogen\mocs_compilation_Debug.cpp | ${cmake_ninja_workdir}qtbase\src\tools\rcc\rcc_autogen\timestamp ${cmake_ninja_workdir}qtbase\src\tools\rcc\rcc_autogen\mocs_compilation_Release.cpp ${cmake_ninja_workdir}qtbase\src\tools\rcc\rcc_autogen\mocs_compilation_Debug.cpp: CUSTOM_COMMAND qtbase\bin\moc.exe || qtbase\bin\Qt6Core.dll qtbase\bin\cmake_automoc_parser.exe qtbase\bin\moc.exe qtbase\src\corelib\Core_autogen_timestamp_deps$:Release qtbase\src\tools\rcc\rcc_autogen_timestamp_deps$:Release
  COMMAND = C:\WINDOWS\system32\cmd.exe /C "cd /D D:\X\ext_nena38_build\qt\src\qt-6.7.0-build\qtbase\src\tools\rcc && "C:\Program Files\CMake\bin\cmake.exe" -E cmake_autogen D:/X/ext_nena38_build/qt/src/qt-6.7.0-build/qtbase/src/tools/rcc/CMakeFiles/rcc_autogen.dir/AutogenInfo.json Release && "C:\Program Files\CMake\bin\cmake.exe" -E cmake_autogen D:/X/ext_nena38_build/qt/src/qt-6.7.0-build/qtbase/src/tools/rcc/CMakeFiles/rcc_autogen.dir/AutogenInfo.json Debug && "C:\Program Files\CMake\bin\cmake.exe" -E touch D:/X/ext_nena38_build/qt/src/qt-6.7.0-build/qtbase/src/tools/rcc/rcc_autogen/timestamp && "C:\Program Files\CMake\bin\cmake.exe" -E cmake_transform_depfile "Ninja Multi-Config" gccdepfile D:/X/ext_nena38_build/qt/src/qt-6.7.0 D:/X/ext_nena38_build/qt/src/qt-6.7.0/qtbase/src/tools/rcc D:/X/ext_nena38_build/qt/src/qt-6.7.0-build D:/X/ext_nena38_build/qt/src/qt-6.7.0-build/qtbase/src/tools/rcc D:/X/ext_nena38_build/qt/src/qt-6.7.0-build/qtbase/src/tools/rcc/rcc_autogen/deps D:/X/ext_nena38_build/qt/src/qt-6.7.0-build/CMakeFiles/d/5261626427453b45d46e288ec291c360a2d0440e4f5913fc8c2f34379b5ddbe1.d"
  DESC = Automatic MOC for target rcc
  depfile = CMakeFiles\d\5261626427453b45d46e288ec291c360a2d0440e4f5913fc8c2f34379b5ddbe1.d
  deps = gcc
  restat = 1

The only difference is : deps = gcc
in Qt 6.7, can that be it?

[cristian-adam]

My ninja.exe version: 1.8.2

Ninja is too old. At https://github.com/ninja-build/ninja/issues/1184 we can see that the fix went in version 1.10.0.

I think Qt CMake code only checks for CMake versions, not for ninja versions. It would be a good suggestion at https://bugreports.qt.io/ so that people won't spend time with weird errors.

[pip010]

@cristian-adam Thanks mate. That did it.