qtpropertybrowser with Qt6

Vouk

I am trying to compile https://github.com/qtproject/qt-solutions/tree/master/qtpropertybrowser with Qt6. It was originally written for Qt4 but with some changes it also compiles with Qt6.

Unfortunately I get an error from the assembler.

The best solution would be if there is a pure Qt6 PropertyGrid / Browser, but I was not able to find one.

g++ -c -fno-keep-inline-dllexport -g -std=gnu++1z -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DISABLE_DEPRECATED_BEFORE=0 -DNODE_EDITOR_STATIC -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I../Prototype -I. -I../Prototype/qtpropertybrowser/src -I../Prototype/nodeeditor/include -IC:/Qt/6.2.3/mingw_64/include -IC:/Qt/6.2.3/mingw_64/include/QtWidgets -IC:/Qt/6.2.3/mingw_64/include/QtGui -IC:/Qt/6.2.3/mingw_64/include/QtCore -Idebug -I. -I/include -IC:/Qt/6.2.3/mingw_64/mkspecs/win32-g++  -o debug\qteditorfactory.o ..\Prototype\qtpropertybrowser\src\qteditorfactory.cpp
C:/Qt/Tools/mingw900_64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/as.exe: debug\qteditorfactory.o: too many sections (41471)
C:\Users\Daniel\AppData\Local\Temp\ccowrsUf.s: Assembler messages:
C:\Users\Daniel\AppData\Local\Temp\ccowrsUf.s: Fatal error: can't write 30 bytes to section .text of debug\qteditorfactory.o: 'file too big'
C:/Qt/Tools/mingw900_64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/as.exe: debug\qteditorfactory.o: too many sections (41471)
C:\Users\Daniel\AppData\Local\Temp\ccowrsUf.s: Fatal error: debug\qteditorfactory.o: file too big
mingw32-make[1]: Leaving directory 'C:/Users/Daniel/Documents/Qt Projects/build-Prototype-Desktop_Qt_6_2_3_MinGW_64_bit-Debug'
mingw32-make[1]: *** [Makefile.Debug:3019: debug/qteditorfactory.o] Error 1
mingw32-make: *** [Makefile:45: debug] Error 2
18:30:11: The process "C:\Qt\Tools\mingw900_64\bin\mingw32-make.exe" exited with code 2.
Error while building/deploying project Prototype (kit: Desktop Qt 6.2.3 MinGW 64-bit)
When executing step "Make"
18:30:11: Elapsed time: 00:13.

Does anybody have an idea why this happens with Qt6?

Thanks.

SGaist

Hi,

What changes did you make ?
Do you have the same issue with a release build ?

There's a linker flag that you can pass to handle big object but I currently fail to see why you are getting that error.

Dragoner

Pushing this up, as I am stuck with the same error while switching from 5.15.2 to 6.4.3

I am trying to use the qtpropertybrowser (6.4.3\Src\qttools\src\shared\qtpropertybrowser) in my project.
When compileing qteditorfactory.cpp with

g++ -c -fno-keep-inline-dllexport -g -std=gnu++1z -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_DEPRECATED_WARNINGS -DSETUP_CONFIGURATOR -DNODE_EDITOR_SHARED -DSPDLOG_COMPILED_LIB -DQT_QML_DEBUG -DQT_OPENGLWIDGETS_LIB -DQT_WIDGETS_LIB -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_SERIALBUS_LIB -DQT_NETWORK_LIB -DQT_SERIALPORT_LIB -DQT_CORE_LIB  -I[...]

  -o debug/qteditorfactory.o ../../../Qt/online/6.4.3/Src/qttools/src/shared/qtpropertybrowser/qteditorfactory.cpp

I get the error

C:/Qt/online/Tools/mingw1120_64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/as.exe: debug/qteditorfactory.o: too many sections (40752)
c:\temp\cc4Ogo3a.s: Assembler messages:
c:\temp\cc4Ogo3a.s: Fatal error: can't write 30 bytes to section .text of debug/qteditorfactory.o: 'file too big'
C:/Qt/online/Tools/mingw1120_64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/as.exe: debug/qteditorfactory.o: too many sections (40752)
c:\temp\cc4Ogo3a.s: Fatal error: debug/qteditorfactory.o: file too big

Dragoner

One solution can be found here :

Use the compiler flag

-Wa,-mbig-obj

(This is ONE compiler flag, so the comma is not a typo!)

FeRDNYC

@Dragoner said in qtpropertybrowser with Qt6:

-Wa,-mbig-obj
(This is ONE compiler flag, so the comma is not a typo!)

Correct. Specifically, it says that the compiler should pass the comma-separated list of arguments that follows (-mbig-obj) to the assembler (-Wa), when it gets run.

There are also -Wp, flags, to pass arguments to the preprocessor stage, and -Wl, flags, when an option needs to go to the linker.

In gcc , at least, the -Xassembler, -Xpreprocessor, and -Xlinker flags can be used to do the same thing one argument at a time, without comma-separating them.

(e.g. these are equivalent:)

$ gcc -Xassembler -mbig-obj ...
$ gcc -Wa,-mbig-obj ...