Installing Qt using gcc, g++ 4.5.0 and Msys-1.0.14 fails!

**olejh** · 12th June 2010, 14:25

Hi,

I have tried to install Qt on MingW platform, but with no luck.

The reason why I need to use MinGW is that I've developed a graphical backend to GNU Octave (http://www.octave.org) which is compiled on Windows with MinGW/MSYS GCC/G++ 4.5.0.

To make it work I need to compile Qt in the same environment as I compiled Octave in.
I've tried to compile both Qt-4.5.3 and Qt-4.6.3 in Mingw, but without any luck.

First I've tried to compile Qt-4.5.3. If I had encounter the same error on Linux, I would know that I am missing a libc6-dev package. I think the error from Qt-4.6.3 is strange....It seems like it favour Windows over MinGW, since the error message here is :
project.cpp:3102:51: error: cannot convert 'wchar_t*' to 'CHAR*' for argument '1' to 'BOOL GetComputerNameA(CHAR*, DWORD*)'

See the error messages at the end.

What should I do?

Best regards,

Ole J.

Qt-4.5.3: configure -opensource -platform win32-g++ gives the following output:

g++ -c -o qfile.o -DQMAKE_OPENSOURCE_EDITION -I. -Igenerators -Igenerators/unix -Igenerators/win32 -Igenerators/mac -I/i/Qt/qt-4.5.3/include -I/i/Qt/qt-4.5.3/include/QtCore -I/i/Qt/qt-4.5.3/src/corelib/global -I/i/Qt/qt-4.5.3/src/script -DQT_NO_PCRE -DQT_BUILD_QMAKE -DQT_BOOTSTRAPPED -DQT_NO_TEXTCODEC -DQT_NO_UNICODETABLES -DQT_NO_COMPONENT -DQT_NO_STL -DQT_NO_COMPRESS -I/i/Qt/qt-4.5.3/mkspecs/win32-g++ -DHAVE_QCONFIG_CPP -DQT_NO_THREAD -DQT_NO_QOBJECT -DQT_NO_GEOM_VARIANT /i/Qt/qt-4.5.3/src/corelib/io/qfile.cpp
g++ -c -o qfsfileengine_unix.o -DQMAKE_OPENSOURCE_EDITION -I. -Igenerators -Igenerators/unix -Igenerators/win32 -Igenerators/mac -I/i/Qt/qt-4.5.3/include -I/i/Qt/qt-4.5.3/include/QtCore -I/i/Qt/qt-4.5.3/src/corelib/global -I/i/Qt/qt-4.5.3/src/script -DQT_NO_PCRE -DQT_BUILD_QMAKE -DQT_BOOTSTRAPPED -DQT_NO_TEXTCODEC -DQT_NO_UNICODETABLES -DQT_NO_COMPONENT -DQT_NO_STL -DQT_NO_COMPRESS -I/i/Qt/qt-4.5.3/mkspecs/win32-g++ -DHAVE_QCONFIG_CPP -DQT_NO_THREAD -DQT_NO_QOBJECT -DQT_NO_GEOM_VARIANT /i/Qt/qt-4.5.3/src/corelib/io/qfsfileengine_unix.cpp
i:/Qt/qt-4.5.3/src/corelib/io/qfsfileengine_unix.cpp:57:22: fatal error: sys/mman.h: No such file or directory
compilation terminated.
make.exe: *** [qfsfileengine_unix.o] Error 1

---------------------------------------------------------------------------

Output: Qt-4.6.3:

configure -opensource -platform win32-g++ gives the following output:

Do you accept the terms of either license? yes

Creating qmake. Please wait...

g++ -c -o project.o -DQMAKE_OPENSOURCE_EDITION -I. -Igenerators -Igenerators/unix -Igenerators/win32 -Igenerators/mac -Igenerators/symbian -I/i/Qt/qt-4.6.3/include -I/i/Qt/qt-4.6.3/include/QtCore -I/i/Qt/qt-4.6.3/src/corelib/global -I/i/Qt/qt-4.6.3/src/corelib/xml -I/i/Qt/qt-4.6.3/tools/shared -DQT_NO_PCRE -DQT_BUILD_QMAKE -DQT_BOOTSTRAPPED -DQT_NO_TEXTCODEC -DQT_NO_UNICODETABLES -DQT_NO_COMPONENT -DQT_NO_STL -DQT_NO_COMPRESS -I/i/Qt/qt-4.6.3/mkspecs/win32-g++ -DHAVE_QCONFIG_CPP -DQT_NO_THREAD -DQT_NO_QOBJECT -DQT_NO_GEOM_VARIANT project.cpp
project.cpp: In member function 'QStringList& QMakeProject::values(const QString&, QMap<QString, QStringList>&)':
project.cpp:3102:51: error: cannot convert 'wchar_t*' to 'CHAR*' for argument '1' to 'BOOL GetComputerNameA(CHAR*, DWORD*)'
make.exe: *** [project.o] Error 1

**olejh** · 14th June 2010, 06:08

Hi,

How does the trolltech guys modify the MinGW to make Qt compile on Windows?
I can use gcc-4.5.0 from Mingw, but qmake.exe gives a segfault when I run it.

I get a message box: The application failed to initialize properly (0xc0000005). Click on OK to terminate the application....

How can I solve this?

Ole