Fails to create debug build of Qt projects on mingw

Hi,

I'm (one of the) package maintainers of the mingw32-qt package on Fedora. This is a cross-compiled version of Qt which allows people to create Win32 binaries on a Linux environment.
The build script used for this package can be found at http://pkgs.fedoraproject.org/gitweb/?p=mingw32-qt.git;a=blob_plain;f=mingw32-qt.spec;hb=HEAD

One of our users has reported a bug to us. He tried to generate a debug build of his project. Unfortunately the compilation failed with an error. Here are the steps to reproduce:

$ cat main.cpp 
#include <QtCore/QCoreApplication>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    return a.exec();
}

$ cat qt_test.pro
QT       += core
QT       -= gui

TARGET = qt_test
CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

$ qmake-qt4 -spec win32-g++-fedora-cross qt_test.pro && make debug
make -f Makefile.Debug
make[1]: Entering directory `/home/erik/qt_test'
i686-pc-mingw32-g++ -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc -Wl,-subsystem,console -mthreads -Wl -o debug/qt_test.exe debug/main.o  -L'/usr/i686-pc-mingw32/sys-root/mingw/lib' -lQtCore4d 
/usr/lib64/gcc/i686-pc-mingw32/4.5.1/../../../../i686-pc-mingw32/bin/ld: cannot find -lQtCore4d
collect2: ld returned 1 exit status
make[1]: *** [debug/qt_test.exe] Error 1
make[1]: Leaving directory `/home/erik/qt_test'
make: *** [debug] Error 2

As you can see qmake has created a Makefile which tries to link against libQtCore4d.a. Unfortunately, this file wasn't created during the compilation of Qt.
However, a file named libQtCored4.a does get created (notice the 'd4' versus the '4d' which the Makefile is referring to).
All other files generated by the Qt build scripts also use the 'd4' suffix.

The Qt MinGW bundle as published on http://qt.nokia.com/downloads/windows-cpp also contains files which contain the 'd4' suffix.

My question is whether this is a bug in the Qt build system, in one of the qmake mkspecs files or in our packaging?

The qmake.conf belonging to the mkspecs name win32-g++-fedora-cross can be found at http://pkgs.fedoraproject.org/gitweb/?p=mingw32-qt-qmake.git;a=blob_plain;f=qmake.conf;hb=HEAD