MingW: A lot of warnings + too slow compiling

hskoglund

Hmm, maybe first check that the toolchain is up to scratch, click New to create a vanilla Untitled widget app, build it with MSYS2 MinGW-64 compiler and see that it starts ok.

Also, try with deleting your build directory. (it should be called
build-app-Desktop_Qt_MinGW_w64_64bit_MSYS2-Debug

fem_dev

@hskoglund
I close all projects....and I create a new C++ Qt Widget Application.
It compile and run Ok! No warnings, no errors. The compile time was fast, but was just a single blank window.

After that, I deleted the build-app folder and cleaned my trash.
After that, I deleted the app.pro.user from the application folder.

So I my project again with Qt (GCC based) it automatically setup the Desktop Qt MingW-w64 64 bits(MSYS2) config (as the same of the image above.

I just click in the Qt Creator IDE build buttom.
It start to build... but I got the same error message:

[Makefile.Debug:1271: debug/moc_app.cpp] Error 1

Any ideas?

hskoglund

Hmm, do you have any spaces in your build path? e.g.
C:\Users\My Name\....
.. . . . . ^

fem_dev

@hskoglund No...

Here is my build path:

C:\Users\VM\Desktop\build-rotortest-Desktop_Qt_MinGW_w64_64bit_MSYS2-Debug

To be more clear: My full project is called "Rotortest". Inside of it, I have a single sub project called "App".

The source and build directories are in my Desktop.

Any help?

hskoglund

Well something's wrong with the moc commandline in the QMake file Makefile.debug, it says above line 1271 but the actual moc command line is something like:

    C:/msys64/mingw64/bin/moc.exe
/C/msys64/mingw64/bin/moc.exe $(DEFINES) --include C:/Users/VM/Desktop/... long line....

Could you open the Makefile.Debug file in your build folder (C:\Users\VM\Desktop\build-rotortest-Desktop_Qt_MinGW_w64_64bit_MSYS2-Debug) and look for lines like those 2 above?

Edit: finding the error might be easier if you attempt to build outside of Qt Creator:
start MSYS2 mingw64 cmd window and type:

cd /c/Users/VM/Desktop/build-rotortest-Desktop_Qt_MinGW_w64_64bit_MSYS2-Debug
make

Then paste the output here...

JKSH

@hskoglund said in MingW: A lot of warnings + too slow compiling:

Perhaps running under Wine will speed your compilation :-)

I would need a beer if that were true (and I don't even drink alcohol)

fem_dev

@hskoglund said in MingW: A lot of warnings + too slow compiling:

finding the error might be easier if you attempt to build outside of Qt Creator:

What I did:
1- In Qt Creator IDE, right-clicked in my project "rotortest" -> Clean
2- Close Qt Creator IDE
3- Opened MSYS2 Mingw64 Prompt and go to the build folder using:

cd /c/Users/VM/Desktop/build-rotortest-Desktop_Qt_MinGW_w64_64bit_MSYS2-Debug

4- Typed: mingw32-make.exe

$ mingw32-make.exe
cd App/ && ( test -e Makefile || C:/msys64/mingw64/bin/qmake.exe -o Makefile C:/Users/VM/Desktop/rotortest/App/App.pro -spec win32-g++ CONFIG+=debug CONFIG+=qml_debug ) && C:/msys64/mingw64/bin/mingw32-make.exe -f Makefile
mingw32-make[1]: Entering directory 'C:/Users/VM/Desktop/build-rotortest-Desktop_Qt_MinGW_w64_64bit_MSYS2-Debug/App'
C:/msys64/mingw64/bin/mingw32-make.exe -f Makefile.Debug
mingw32-make[2]: Entering directory 'C:/Users/VM/Desktop/build-rotortest-Desktop_Qt_MinGW_w64_64bit_MSYS2-Debug/App'
/C/msys64/mingw64/bin/uic.exe ../../rotortest/App/app.ui -o ui_app.h
/C/msys64/mingw64/bin/uic.exe ../../rotortest/App/custom_widget/value_unit.ui -o ui_value_unit.h
/C/msys64/mingw64/bin/uic.exe ../../rotortest/App/form/form_assembly.ui -o ui_form_assembly.h
/C/msys64/mingw64/bin/uic.exe ../../rotortest/App/form/form_excitation.ui -o ui_form_excitation.h
/C/msys64/mingw64/bin/uic.exe ../../rotortest/App/form/form_job.ui -o ui_form_job.h
/C/msys64/mingw64/bin/uic.exe ../../rotortest/App/form/form_library.ui -o ui_form_library.h
/C/msys64/mingw64/bin/uic.exe ../../rotortest/App/form/form_material_elastic.ui -o ui_form_material_elastic.h
/C/msys64/mingw64/bin/uic.exe ../../rotortest/App/form/form_material_fluid.ui -o ui_form_material_fluid.h
/C/msys64/mingw64/bin/uic.exe ../../rotortest/App/form/form_part.ui -o ui_form_part.h
/C/msys64/mingw64/bin/uic.exe ../../rotortest/App/plot.ui -o ui_plot.h
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/table.o ../../rotortest/App/custom_widget/table.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/value_unit.o ../../rotortest/App/custom_widget/value_unit.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/form_assembly.o ../../rotortest/App/form/form_assembly.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/form_excitation.o ../../rotortest/App/form/form_excitation.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/form_job.o ../../rotortest/App/form/form_job.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/form_library.o ../../rotortest/App/form/form_library.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/form_material_elastic.o ../../rotortest/App/form/form_material_elastic.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/form_material_fluid.o ../../rotortest/App/form/form_material_fluid.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/form_part.o ../../rotortest/App/form/form_part.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/main.o ../../rotortest/App/main.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/app.o ../../rotortest/App/app.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/density.o ../../rotortest/App/material/density.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/material.o ../../rotortest/App/material/material.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/viscosity.o ../../rotortest/App/material/viscosity.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/step_density.o ../../rotortest/App/step/step_density.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/step_viscosity.o ../../rotortest/App/step/step_viscosity.cpp
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../../rotortest/App -I. -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -I../../rotortest/App/third-party/gsl -I../../rotortest/App/third-party/gsl -isystem C:/msys64/mingw64/include/QtWidgets -isystem C:/msys64/mingw64/include/QtGui -isystem C:/msys64/mingw64/include/QtCore -Idebug -I. -I/include -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++  -o debug/update_project.o ../../rotortest/App/update_project.cpp
g++ -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -dM -E -o debug/moc_predefs.h C:/msys64/mingw64/share/qt5/mkspecs/features/data/dummy.cpp
/C/msys64/mingw64/bin/moc.exe -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN --include C:/Users/VM/Desktop/build-rotortest-Desktop_Qt_MinGW_w64_64bit_MSYS2-Debug/App/debug/moc_predefs.h -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++ -IC:/Users/VM/Desktop/rotortest/App -I'C:/Program Files/HDF_Group/HDF5/1.12.0/include' -IC:/Users/VM/Desktop/rotortest/App/third-party/gsl -IC:/Users/VM/Desktop/rotortest/App/third-party/gsl -IC:/msys64/mingw64/include/QtWidgets -IC:/msys64/mingw64/include/QtGui -IC:/msys64/mingw64/include/QtCore -I. -IC:/msys64/mingw64/include/c++/10.1.0 -IC:/msys64/mingw64/include/c++/10.1.0/x86_64-w64-mingw32 -IC:/msys64/mingw64/include/c++/10.1.0/backward -IC:/msys64/mingw64/lib/gcc/x86_64-w64-mingw32/10.1.0/include -IC:/msys64/mingw64/include -IC:/msys64/mingw64/lib/gcc/x86_64-w64-mingw32/10.1.0/include-fixed -IC:/msys64/mingw64/x86_64-w64-mingw32/include ../../rotortest/App/app.h -o debug/moc_app.cpp
Usage: C:\msys64\mingw64\bin\moc.exe [options] [header-file] [@option-file] [MOC generated json file]
Qt Meta Object Compiler version 67 (Qt 5.15.0)

Options:
  -?, -h, --help                    Displays help on commandline options.
  --help-all                        Displays help including Qt specific
                                    options.
  -v, --version                     Displays version information.
  -o <file>                         Write output to file rather than stdout.
  -I <dir>                          Add dir to the include path for header
                                    files.
  -F <framework>                    Add Mac framework to the include path for
                                    header files.
  -E                                Preprocess only; do not generate meta
                                    object code.
  -D <macro[=def]>                  Define macro, with optional definition.
  -U <macro>                        Undefine macro.
  -M <key=value>                    Add key/value pair to plugin meta data
  --compiler-flavor <flavor>        Set the compiler flavor: either "msvc" or
                                    "unix".
  -i                                Do not generate an #include statement.
  -p <path>                         Path prefix for included file.
  -f <file>                         Force #include <file> (overwrite default).
  -b <file>                         Prepend #include <file> (preserve default
                                    include).
  --include <file>                  Parse <file> as an #include before the main
                                    source(s).
  -n <which>                        Do not display notes (-nn) or warnings
                                    (-nw). Compatibility option.
  --no-notes                        Do not display notes.
  --no-warnings                     Do not display warnings (implies
                                    --no-notes).
  --ignore-option-clashes           Ignore all options that conflict with
                                    compilers, like -pthread conflicting with
                                    moc's -p option.
  --output-json                     In addition to generating C++ code, create
                                    a machine-readable JSON file in a file that
                                    matches the output file and an extra .json
                                    extension.
  --collect-json                    Instead of processing C++ code, collect
                                    previously generated JSON output into a
                                    single file.
  --output-dep-file                 Output a Make-style dep file for build
                                    system consumption.
  --dep-file-path <file>            Path where to write the dep file.
  --dep-file-rule-name <rule name>  The rule name (first line) of the dep file.

Arguments:
  [header-file]                     Header file to read from, otherwise stdin.
  [@option-file]                    Read additional options from option-file.
  [MOC generated json file]         MOC generated json output
moc: Too many input files specified: 'Files/HDF_Group/HDF5/1.12.0/include' '../../rotortest/App/app.h'
mingw32-make[2]: *** [Makefile.Debug:1271: debug/moc_app.cpp] Error 1
mingw32-make[2]: Leaving directory 'C:/Users/VM/Desktop/build-rotortest-Desktop_Qt_MinGW_w64_64bit_MSYS2-Debug/App'
mingw32-make[1]: *** [Makefile:45: debug] Error 2
mingw32-make[1]: Leaving directory 'C:/Users/VM/Desktop/build-rotortest-Desktop_Qt_MinGW_w64_64bit_MSYS2-Debug/App'
mingw32-make: *** [Makefile:50: sub-App-make_first] Error 2

I went to the Makefile.Debug.
Here is the line 1270 and 1271

C:/msys64/mingw64/bin/moc.exe
	/C/msys64/mingw64/bin/moc.exe $(DEFINES) --include C:/Users/VM/Desktop/build-rotortest-Desktop_Qt_MinGW_w64_64bit_MSYS2-Debug/App/debug/moc_predefs.h -IC:/msys64/mingw64/share/qt5/mkspecs/win32-g++ -IC:/Users/VM/Desktop/rotortest/App -I'C:/Program Files/HDF_Group/HDF5/1.12.0/include' -IC:/Users/VM/Desktop/rotortest/App/third-party/gsl -IC:/Users/VM/Desktop/rotortest/App/third-party/gsl -IC:/msys64/mingw64/include/QtWidgets -IC:/msys64/mingw64/include/QtGui -IC:/msys64/mingw64/include/QtCore -I. -IC:/msys64/mingw64/include/c++/10.1.0 -IC:/msys64/mingw64/include/c++/10.1.0/x86_64-w64-mingw32 -IC:/msys64/mingw64/include/c++/10.1.0/backward -IC:/msys64/mingw64/lib/gcc/x86_64-w64-mingw32/10.1.0/include -IC:/msys64/mingw64/include -IC:/msys64/mingw64/lib/gcc/x86_64-w64-mingw32/10.1.0/include-fixed -IC:/msys64/mingw64/x86_64-w64-mingw32/include ../../rotortest/App/app.h -o debug/moc_app.cpp

Any help?

hskoglund

Achilles' heel #1 in Linux/gcc: spaces in directories. Not in your build path, but in an include file:
Screenshot 2020-07-17 at 01.10.45.png

Edit: there's a quick-and-dirty solution (very short-term, will not survive a qmake), open that Makefile.Debug file in an editor and change line 1271 so that the problematic include directory is surrounded by double quotes (not single), i.e. so it looks like this extract:

...Desktop/rotortest/App -I"C:/Program Files/HDF_Group/HDF5/1.12.0/include" -IC:/Users/VM/Desktop/rotortest/App/thir...

Again: very short-term solution :-)

fem_dev

@hskoglund Wowwww!!! Thank you so much!!

I saw that this single quotes + blank spaces problem is very present in a lot of places of my Makefile.Debug.

@hskoglund said in MingW: A lot of warnings + too slow compiling:

Again: very short-term solution :-)

Is there a way to modify my rotortest.pro or any Qt Creator IDE configuration to resolve all occurrences at the same time?

Thank you so much @hskoglund ! You are the best!

Fixing this located problem, I will check if the compilation time is Ok or not.

fem_dev

@fem_dev said in MingW: A lot of warnings + too slow compiling:

I saw that this single quotes + blank spaces problem is very present in a lot of places of my Makefile.Debug.

I manually replaced all occurrences of this problem in the Makefile.debug and compile it using mingw32-make.exe.
It compiles ok! No warnings and no errors!!! Build and run with success!!

First problem: Fixed!!

Lets go to the final problem: The slower time to compile using MingW version.

Now, to measure how long each compiler takes to build my project, I have to be able to clean main build folder and build again switching between theses compilers inside the Qt Creator IDE:

MingW-w64 (GCC 10.1.0) (the last one)
MSVC 2019
GCC 9.3 (On my Ubuntu 20.04 machine - same hardware)

To do that, I need to be possible to clean up the build folder and rebuild all without fix the Makefile.debug manually.

Is there a way to config Qt Creator IDE (GCC Based) to generate only include lines with double quotes?

How can I do it?

hskoglund

Trying to add double quotes to those INCLUDEPATH += ... lines in the .pro file is almost impossible, because of the heavy munging that MSYS2 does (replaces all \ with / etc.)

But fear not, there's a sneaky way to get those double quotes to the command line:
in the .pro file, it involves replacing all the

INCLUDEPATH += "C:\Path\Path With Spaces"

with

QMAKE_CXXFLAGS += -I\"C:\Path\Path With Spaces\"

Note: you only need to this replacement for the INCLUDEPATH s that have spaces in them.

fem_dev

@fem_dev said in MingW: A lot of warnings + too slow compiling:

Lets go to the final problem: The slower time to compile using MingW version.

UPDATE 1

I move my HDF5 dependency libray folder to my HD root on C:\. So it fix the "single quotes" problem and Qt Creator IDE can build my project from scratch now and I can switch between the compilers.

Time to build my project:

MSYS MingW-w64 GCC 10.1.0 based: 70 seconds
MSVC 2019: 16 seconds
GCC 9.3: 13 seconds (On my Ubuntu 20.04 machine)

So, MSVC and GCC on Linux is very close time to build, but MSYS2 MingW-w64 is 5x slower using the same IDE version in the same machine.

Using:

Qt Creator IDE 4.12.4
Qt 5.15

My machines hardware are:

Intel Core i7 6 Cores 12 Threads 2.2GHz
32GB RAM
1TB NVMe storage

Is there a way to speed up the MSYS2 MingW-w64 compiler?

Obs.: Just to be clear, all 3 compilers are building my project without any warning or error messages!

fem_dev

@hskoglund said in MingW: A lot of warnings + too slow compiling:

QMAKE_CXXFLAGS += -I"C:\Path\Path With Spaces"

@hskoglund you are amazing!

hskoglund

Interesting about the compile times.
For another example, I have a project that used to compile in almost 1 hour on MSVC2015 I seem to remember.
Note: there's 2 large .h files that GitLab doesn't like, they can be downloaded here:
http://tripleboot.org/Projects/tctermscales.h.nogit
http://tripleboot.org/Projects/tcterms.h.nogit

I just tried now (for all tests: I nuked the build folder and the .pro.user file):

MSVC2019 on WIn10: 19 minutes 43 seconds but with error: TWTCData\tcterms.h.nogit(2826) : fatal error C1128: number of sections exceeded object file format limit: compile with /bigobj

Mingw81_32 on Win10: 52 minutes 23 seconds

gcc 9.3.0 on Ubuntu 20.04: 52 minutes 23 seconds

Mingw81_32 on Wine on Ubuntu 20.04: 50 minutes and 54 seconds

MSYS2 Mingw32 on Win10: 1 minute and 54 seconds

Apple clang version 11.0.3 on MacOS 10.15.6: 36 seconds

So in my case, MSYS2 performs rather well (only to be beaten by clang).

@JKSH : so maybe you'll have to drink that beer, because my project actually builds slightly faster on Wine than on a real Windows. Admittedly not much of a difference though...

JKSH

@hskoglund said in MingW: A lot of warnings + too slow compiling:

@JKSH : so maybe you'll have to drink that beer, because my project actually builds slightly faster on Wine than on a real Windows. Admittedly not much of a difference though...

Dagnabbit! :-D

And I definitely wasn't expecting MinGW on Wine to beat native GCC on Ubuntu. Any ideas how that works?

@hskoglund said in MingW: A lot of warnings + too slow compiling:

gcc 9.3.0 on Ubuntu 20.04: 52 minutes 23 seconds
...
MSYS2 Mingw32 on Win10: 1 minute and 54 seconds

...or how this works?

hskoglund

Well the difference between Wine and native gcc on Ubuntu is only about 4% so it could be due to some caching in Wine.

But as to why MSYS2 mingw and clang just kills the others I don't know. The 2 big .h files have approx. 17000 QStringLiterals each (I get very nice loading/runtime performance using QStringLiterals)

Someday I should test with say 10000 QStringLiterals etc...

P.S. To get MSVC2019 to build, I added to the .pro file for MSVC2019:
win32-msvc: QMAKE_CXXFLAGS += "/bigobj"
and it just finished:
MSVC2019 on Win7: 18 minutes and 46 seconds. Pretty good!

J.Hilk

Since, mingw is a gnu port to windows, It's bound to be slower on Windows than on linux

When I changed ( about 2 years ago ) from mingw to MSVC as the default compiler, my project build time was slashed by a factor of 5, consistently across all projects!

May also be due to all the shady business and corners cut that MSVC does 🤷‍♂️.

Microsoft does not have a good track record with compilers and compiler safety :)

JonB

@J-Hilk said in MingW: A lot of warnings + too slow compiling:

from mingw to MSVC as the default compiler, my project build time was slashed by a factor of 5, consistently across all projects!

This is just depressing :( Why does it achieve that? They are compilers. "Cutting corners" could surely not get even vaguely near that. There must be some fundamental architectural difference. I've been meaning to raise a topic about this for a while, I note that MSVC makes heavy use of .pch files and gcc does not seem to do that at all?

jsulm

@JonB I guess Posix implementation on Windows is not that good...

fem_dev

@hskoglund said in MingW: A lot of warnings + too slow compiling:

MSYS2 Mingw32 on Win10: 1 minute and 54 seconds

Wowww! So fast!!
@hskoglund Only to confirm: this test was made using MSYS2 MingW-W64 or (32 bit version)?
I am confused about how your results can be just the reverse of mine. I would expect proportional results, as we are using the same compilers, on the same OS, etc ...

If you think there may be another configuration that I can change to try to get your MingW (Win10) build time, please let me know! I can try!

@hskoglund said in MingW: A lot of warnings + too slow compiling:

MSVC2019 on Win7: 18 minutes and 46 seconds. Pretty good!

With this last flag, MSVC2019 is pretty good too!

@J-Hilk said in MingW: A lot of warnings + too slow compiling:

by a factor of 5

Exactly. That's the build time difference that I have in my current project switching between theses 3 compilers.

@JonB said in MingW: A lot of warnings + too slow compiling:

MSVC makes heavy use of .pch files and gcc does not seem to do that at all?

a) Did you mean that MSVC create *.pch files automatically? Without an explicit developer setting?

b) Even though MSVC does this, in my tests above I always cleaned the build folder completely before recompiling. So there would be no *.pch file to optimize compilation time. Right?