some error in my first program

[rainius]

It was maybe caused by setting on include path.

my code is --

#include <Qt/QApplication.h>
#include <Qt/QLabel.h>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QLabel *label = new QLabel("Hello Qt!");
label->show();
return app.exec();
}


And after running "mingw32-make", following error msg came in:

mingw32-make -f Makefile.Debug
mingw32-make[1]: Entering directory `C:/wp_Cpp/hello'
g++ -c -g -frtti -fexceptions -mthreads -Wall -DUNICODE -DQT_LARGEFILE_SUPPORT -DQT_DLL -DQT_GUI_LIB -DQT_CORE_LIB -DQT_THREAD_SUPPORT -DQT_NEEDS_QMAIN -I'../../Qt/4.4.0/include/QtCore' -I'../../Qt/4.
4.0/include/QtCore' -I'../../Qt/4.4.0/include/QtGui' -I'../../Qt/4.4.0/include/QtGui' -I'../../Qt/4.4.0/include' -I'.' -I'c:/Qt/4.4.0/include/ActiveQt' -I'debug' -I'.' -I'../../Qt/4.4.0/mkspecs/win32-
g++' -o debug/hello.o hello.cpp
In file included from ../../Qt/4.4.0/include/QtCore/qglobal.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/global/qnamespace.h:47,
from ../../Qt/4.4.0/include/QtCore/qnamespace.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/kernel/qobjectdefs.h:47,
from ../../Qt/4.4.0/include/QtCore/qobjectdefs.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/kernel/qobject.h:49,
from ../../Qt/4.4.0/include/QtCore/qobject.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/kernel/qcoreapplication.h:47,
from ../../Qt/4.4.0/include/QtCore/qcoreapplication.h:1,
from ../../Qt/4.4.0/include/Qt/../../src/gui/kernel/qapplication.h:47,
from ../../Qt/4.4.0/include/Qt/QApplication.h:1,
from hello.cpp:1:
../../Qt/4.4.0/include/QtCore/../../src/corelib/global/qglobal.h:47:20: stddef.h: No such file or directory
In file included from ../../Qt/4.4.0/include/QtCore/qglobal.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/global/qnamespace.h:47,
from ../../Qt/4.4.0/include/QtCore/qnamespace.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/kernel/qobjectdefs.h:47,
from ../../Qt/4.4.0/include/QtCore/qobjectdefs.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/kernel/qobject.h:49,
from ../../Qt/4.4.0/include/QtCore/qobject.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/kernel/qcoreapplication.h:47,
from ../../Qt/4.4.0/include/QtCore/qcoreapplication.h:1,
from ../../Qt/4.4.0/include/Qt/../../src/gui/kernel/qapplication.h:47,
from ../../Qt/4.4.0/include/Qt/QApplication.h:1,
from hello.cpp:1:
../../Qt/4.4.0/include/QtCore/../../src/corelib/global/qglobal.h:1850: error: variable `qMalloc' definition is marked dllimport.
../../Qt/4.4.0/include/QtCore/../../src/corelib/global/qglobal.h:1850: error: `size_t' was not declared in this scope
../../Qt/4.4.0/include/QtCore/../../src/corelib/global/qglobal.h:1852: error: `size_t' has not been declared
../../Qt/4.4.0/include/QtCore/../../src/corelib/global/qglobal.h:1852: error: ISO C++ forbids declaration of `size' with no type
../../Qt/4.4.0/include/QtCore/../../src/corelib/global/qglobal.h:1853: error: `size_t' has not been declared
../../Qt/4.4.0/include/QtCore/../../src/corelib/global/qglobal.h:1853: error: ISO C++ forbids declaration of `n' with no type
../../Qt/4.4.0/include/QtCore/../../src/corelib/global/qglobal.h:1854: error: `size_t' has not been declared
../../Qt/4.4.0/include/QtCore/../../src/corelib/global/qglobal.h:1854: error: ISO C++ forbids declaration of `n' with no type
In file included from ../../Qt/4.4.0/include/QtCore/qbytearray.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qstring.h:48,
from ../../Qt/4.4.0/include/QtCore/qstring.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/kernel/qobject.h:50,
from ../../Qt/4.4.0/include/QtCore/qobject.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/kernel/qcoreapplication.h:47,
from ../../Qt/4.4.0/include/QtCore/qcoreapplication.h:1,
from ../../Qt/4.4.0/include/Qt/../../src/gui/kernel/qapplication.h:47,
from ../../Qt/4.4.0/include/Qt/QApplication.h:1,
from hello.cpp:1:
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h:50:20: string.h: No such file or directory
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h:51:20: stdarg.h: No such file or directory
In file included from ../../Qt/4.4.0/include/QtCore/qbytearray.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qstring.h:48,
from ../../Qt/4.4.0/include/QtCore/qstring.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/kernel/qobject.h:50,
from ../../Qt/4.4.0/include/QtCore/qobject.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/kernel/qcoreapplication.h:47,
from ../../Qt/4.4.0/include/QtCore/qcoreapplication.h:1,
from ../../Qt/4.4.0/include/Qt/../../src/gui/kernel/qapplication.h:47,
from ../../Qt/4.4.0/include/Qt/QApplication.h:1,
from hello.cpp:1:
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h: In function `uint qstrlen(const char*)':
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h:70: error: `strlen' undeclared (first use this function)
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h:70: error: (Each undeclared identifier is reported only once for each function it appears in.)
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h: In function `int qstrncmp(const char*, const char*, uint)':
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h:93: error: `strncmp' undeclared (first use this function)
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h: At global scope:
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h:100: error: `size_t' has not been declared
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h:100: error: `va_list' has not been declared
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h:100: error: ISO C++ forbids declaration of `n' with no type
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h:100: error: ISO C++ forbids declaration of `ap' with no type
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h:101: error: `size_t' has not been declared
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h:101: error: ISO C++ forbids declaration of `n' with no type
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h: In function `bool operator==(const QByteArray&, const QByteArray&)':
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qbytearray.h:495: error: `memcmp' undeclared (first use this function)
In file included from ../../Qt/4.4.0/include/QtCore/qstring.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/kernel/qobject.h:50,
from ../../Qt/4.4.0/include/QtCore/qobject.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/kernel/qcoreapplication.h:47,
from ../../Qt/4.4.0/include/QtCore/qcoreapplication.h:1,
from ../../Qt/4.4.0/include/Qt/../../src/gui/kernel/qapplication.h:47,
from ../../Qt/4.4.0/include/Qt/QApplication.h:1,
from hello.cpp:1:
../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qstring.h:62:22: string: No such file or directory
In file included from ../../Qt/4.4.0/include/QtCore/qstring.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/kernel/qobject.h:50,
from ../../Qt/4.4.0/include/QtCore/qobject.h:1,
from ../../Qt/4.4.0/include/QtCore/../../src/corelib/kernel

...............


../../Qt/4.4.0/include/QtCore/../../src/corelib/tools/qvector.h:376: error: `qMalloc' cannot be used as a function
mingw32-make[1]: *** [debug/hello.o] Error 1
mingw32-make[1]: Leaving directory `C:/wp_Cpp/hello'
mingw32-make: *** [debug] Error 2

[lyuts]

How did you install Qt? Show us your installation steps.

[rainius]

hi

Firstly, I downloaded 'qt-win-opensource-4.4.0-mingw.exe' and MinGW 3.4.2, and then ran them.

Then I set following env variables:

PATH = C:\MinGW_Qt\bin;C:\MinGW_Qt\libexec\gcc\mingw32\3. 4.2;c:\mysql\bin;c:\ruby\bin;C:\Qt\4.4.0\bin

INCLUDE = C:\MinGW_Qt\include;C:\Qt\4.4.0\include

LIB = C:\MinGW_Qt\lib;C:\Qt\4.4.0\lib

QTDIR = C:\Qt\4.4.0

Then I went Start Menu and run 'Qt 4.4.0 (Build Debug Libraries)'. It seemed that the command ran without any error.

That's all.

Thanks!

[rainius]

Who knows what is wrong?

[rainius]

hey

I intalled a MinGW5.1.4 instead of 3.4.2, and ran 'make', that was OK.

but I could not image the reason.

[lyuts]

This is how i usually install Qt.
1. Install MinGW v3.4.2
2. Run Qt installer
3. go to QTDIR
4. run configure.exe (with params that i nedd)
5. run mingw32-make
6. run mingw32-make install (probably not needed, but i run it)

an Qt is ready.