我在本论坛下了devcpp-4.9.9.2_setup.exe、qt-win-opensource-4.1.1-mingw.exe。但是安装后，设置了个环境变量，建立debug环境时出现了下面的问题，请问如何解决啊？
(cd winmain && mingw32-make -f Makefile debug)
mingw32-make[1]: Entering directory `C:/Qt/src/winmain'
mingw32-make -f Makefile.Debug
mingw32-make[2]: Entering directory `C:/Qt/src/winmain'
g++ -c -g -g -Wall -frtti -fexceptions -DQT_THREAD_SUPPORT -DUNICODE -DQT_LARGEF
ILE_SUPPORT -DQT_NEEDS_QMAIN -DQT_NO_CAST_TO_ASCII -DQT3_SUPPORT -DQT_MOC_COMPAT
-I"C:/Qt/include" -I"tmp" -I"C:/Qt/include/QtCore" -I"C:\Qt\include\qtmain" -I"
tmp" -I"C:/Qt/include/ActiveQt" -I"tmp\moc\debug_shared" -I"." -I"C:/Qt/mkspecs/
win32-g++" -o tmp\obj\debug_shared\qtmain_win.o qtmain_win.cpp
ar -ru "..\..\lib\libqtmaind.a" tmp\obj\debug_shared\qtmain_win.o
ar: creating ..\..\lib\libqtmaind.a
mingw32-make[2]: Leaving directory `C:/Qt/src/winmain'
mingw32-make[1]: Leaving directory `C:/Qt/src/winmain'
(cd tools/moc && mingw32-make -f Makefile first)
mingw32-make[1]: Makefile: No such file or directory
mingw32-make[1]: *** No rule to make target `Makefile'. Stop.
mingw32-make[1]: Entering directory `C:/Qt/src/tools'
mingw32-make[1]: Leaving directory `C:/Qt/src/tools'
mingw32-make: *** [debug-tools/moc] Error 2
