其实都是一样的，QWidget文件里面就最终会include <qwidget.h>, 搜索你的qt安装目录，找到QWidget文件，看它在哪个位置，然后修改makefile，如下所示
INCPATH = -I"d:\Qt\2009.01\qt\include\QtCore" -I"d:\Qt\2009.01\qt\include\QtGui" -I"d:\Qt\2009.01\qt\include" -I"d:\Qt\2009.01
在上面这行加入你的QWidget文件所在路径
####### Compiler, tools and options
CC = gcc
CXX = g++
DEFINES = -DUNICODE -DQT_LARGEFILE_SUPPORT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_THREAD_SUPPORT -DQT_NEEDS_QMAIN
CFLAGS = -O2 -Wall $(DEFINES)
CXXFLAGS = -O2 -Wall -fno-exceptions -fno-rtti $(DEFINES)
INCPATH = -I"d:\Qt\2009.01\qt\include\QtCore" -I"d:\Qt\2009.01\qt\include\QtGui" -I"d:\Qt\2009.01\qt\include" -I"d:\Qt\2009.01\qt\include\ActiveQt" -I"release" -I"." -I"d:\Qt\2009.01\qt\mkspecs\win32-g++"
LINK = g++
LFLAGS = -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc -Wl,-s -Wl,-subsystem,windows
LIBS = -L"d:\Qt\2009.01\qt\lib" -lmingw32 -lqtmain -lQtGui4 -lQtCore4
QMAKE = d:\Qt\2009.01\qt\bin\qmake.exe
IDC = d:\Qt\2009.01\qt\bin\idc.exe
IDL = midl
ZIP = zip -r -9
DEF_FILE =
RES_FILE =
COPY = copy /y
COPY_FILE = $(COPY)
COPY_DIR = xcopy /s /q /y /i
DEL_FILE = del
DEL_DIR = rmdir
MOVE = move
CHK_DIR_EXISTS= if not exist
MKDIR = mkdir
INSTALL_FILE = $(COPY_FILE)
INSTALL_PROGRAM = $(COPY_FILE)
INSTALL_DIR = $(COPY_DIR)
