MingW: A lot of warnings + too slow compiling

fem_dev

I was using Qt + MSVC compiler, but I would like to try change to use Qt with MingW-w64 toolkit.

I rebuild my third-party libraries from source to get the *.a compatible library files.
Finally, I change my App *.pro file to use the generated *.a files instead of the *.lib files (MSVC compiler).

My app compiled and ran ok, no errors!

But 2 things are strange:
a) I received 10.000 warning messages in Qt Creator console
b) The compilation time was too slow. More than 10x the MSVC compile time.

When I compile using MSVC, I got no warnings at all.

Why this is happening?
How can I fix it?

My system is:

OS: Windows 10 x64
Compiler A: MSVC 2019
Compiler B: MingW-W64
Qt Creator IDE 4.12.4
Qt 5.15

UPDATE 1

I copy this same Qt project to my Ubuntu 20.04 machine that is using GCC 9.3.
The GCC compile time is so fast as MSVC. Both are close of just 7 seconds.

The MingW-W64 still 4 MINUTES! (35x slower)

Any ideas?

JKSH

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

I received 10.000 warning messages in Qt Creator console

It's a bug in GCC 7.x:

fem_dev

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

It's a bug in GCC 7.x:

I'm using Mingw-W64 8.1 (May be GCC 8.1 as well?) as you can see in my Qt configuration below:

This MingW 8.1 was installed using the official Qt Maintenance installer together with Qt 5.15 and Qt Creator IDE 4.12.4. So, it's the last version today.

That's right? Am I missing something?

Well, after that, I saw that is possible to download and install another version of MingW-W64 using MSYS2-64 bits.
I did it and I got in my Windows machine a MingW-W64 terminal with:

GCC 10.1.0

Look below:

Question 1:
Is there a way to fix the official MingW 8.1 (GCC) provided by the Qt installer and get back the compiler speed and no warnings like the MSVC or GCC on Linux?

Question 2:
If is not possible to fix it, is there a way to use my installed GCC-10.1.0 inside Qt Creator IDE?

UPDATE 1: GCC-10.1.0

I manually added the GCC-10.1.0 x64 installed by MSYS2-64 bits to my Qt Configurations.
With it, I rebuild my Qt project without any warnigs or erros. Built 100% ok!
But the compilation time still very slow (30x slower than GCC on Linux ou MSVC) and my application crashs at the start.

The program has unexpectedly finished.

My system is:

OS: Windows 10 x64
Compiler A: MSVC 2019
Compiler B: MingW-W64 8.1 (provided by the Qt installer)
Compiler C: GCC 10.0.1 (provided by MSYS2 - Outside Qt)
Qt Creator IDE 4.12.4
Qt 5.15

jsulm

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

is there a way to use my installed GCC-10.1.0 inside Qt Creator IDE?

Normally it is better to use MinGW provided through Qt installer as that one is tested. Especially a different compiler version can be problematic.

fem_dev

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

Normally it is better to use MinGW provided through Qt installer as that one is tested. Especially a different compiler version can be problematic

Yes @jsulm ...I think so...
But as you can see, both MingW versions are taking a long time to compile. And GCC-10.1 crashs my application when this app starts.

Any ideas?

hskoglund

Hi, about the crashing, it could be due to the gcc version in Qt/MinGW and gcc in MSYS2 have different runtimes (different toolchains or different .dlls), what I mean: your main.cpp is compiled with the MSYS2 version but the Qt .dlls like Qt5Core.dll etc. are compiled with Qt/MinGW.

But it should be possible to build a custom version of Qt 5.15.0's .dlls using that MSYS2 toolchain.

fem_dev

@hskoglund Thank you for the explanation.

May be, the crash cause is that you said. I will think about it. Thank you.

Even if the crash problem is the incompatibility of Qt's internal * .dll's, there is still a question of the reasons behind the items below:

a) Both official Qt MingW 8.1 and MSYS2 GCC 10.1 compile time are 30x SLOWER than GCC 9.3 on Linux or MSVC 2019 on Windows 10 x64
b) Offical Qt MingW 8.1 are given to my 10.000 warning messages at compile time about internal Qt files. (Look the image in the first post above)
c) How can I use some version of GCC with Qt Creator 4.12.4 on Windows 10 x64 without theses 2 problems above.

Obs.: I need to use GCC because I have to integrate my custom old Fortran libraries with my new Qt C++ application.
Theses Fortran libraries were compiled using gfortran 9.3.0.
So the C/C++ compatible compiler is GCC. I can't do it using MSVC, because I don't have the Intel Fortran Compiler.

I appreciate any help!

hskoglund

How you tried if Qt Creator available inside MSYS2 makes more speedy compilations? Tto install the 64-bit, try this on a MSYS2 prompt:

pacman -S mingw-w64-x86_64-qt-creator

Previously I tested 32-bit Qt Creator, works fine, screenshot:

Screenshot 2020-07-16 at 17.42.28.png

Edit: more about Qt in MSYS2 here

fem_dev

@hskoglund thank you for your help.

I did what you said:

pacman -S mingw-w64-x86_64-qt-creator

This command installed a MingW-64 version of:

Assistant 5.15
Designer 5.15
Linguist 5.15
Qt 5.15
As you can see in my Start Menu below:

But it does not installed the Qt Creator IDE build from GCC like your image above.
So, my Qt Creator IDE is still MSVC:

Is that right?

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

How you tried if Qt Creator available inside MSYS2 makes more speedy compilations?

In my Windows 10 machine I have 3 Qt configurations installed:

MSVC 2019
Official Qt MingW-W64 8.1
MSYS2 MingW-W64 (GCC 10.1.0)

Inside Qt Creator IDE, I'm measuring the compilation time just switching between theses 3 configs.
a) With MSVC, my project builds in 7 seconds. (no warnings, no errors).
b) With MingW 8.1 or MingW (GCC 10.1) the same project build in 4 or 5 MINUTES.

c) I tested the same project in another machine running Ubuntu 20.04 with GCC 9.3.0. The complation time is 7 seconds too. No warnings. No errors.

Just MingW-W64 (Qt official and MSYS2) are slow.

hskoglund

Re. 64-bit Qt Creator in MSYS2, it's there alright (I didn't know the MSYS2 Qt stuff can be visible in the Windows 10 Start Menu)
Anway start a 64-bit MSYS2 prompt: c:\msys64\mingw64.exe
Then inside that just type: qtcreator

BTW: got another (crazy?) idea, you could try using Wine in your Ubuntu 20.04 to install and run the normal Windows Qt MinGW::
Screenshot 2020-07-16 at 20.08.00.png

Perhaps running under Wine will speed your compilation :-)

fem_dev

@hskoglund thank you!

So I opened the Qt Creator IDE using MSYS2 prompt:

qtcreator

It open the correct on Qt Creator IDE (GCC 10.1.0 based):

Look in: Tools -> Options -> Kits
The original MSYS2 MingW-W64 Qt Configuration (GCC based)

After that, I right clicked in my project -> Clean
After that, I clicked on build button (bottom left hammer)

During the compile process, I got this single error message:

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

Obs.: My Qt GUI application is called "App"

Could you help me?

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.