Qt环境变量设置：
QTDIR=E:\Devel\Qt\4.7.3
PATH=E:\Devel\Qt\4.7.3\bin;%PATH%
QMAKESPEC=win32-g++
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MinGw环境变量设置：
MinGw_PATH=
E:\Development\MinGW
PATH=
%MinGW_PATH%\bin;
%MinGW_PATH%\libexec\gcc\mingw32\4.5.2;
%PATH%
C_INCLUDE_PATH=
%MinGW_PATH%\include;
%MinGW_PATH%\lib\gcc\mingw32\4.5.2\include
LIBRARY_PATH=
%MinGW_PATH%\lib;
%MinGW_PATH%\lib\gcc\mingw32\4.5.2
CPLUS_INCLUDE_PATH=
%MinGW_PATH%\lib\gcc\mingw32\4.5.2\include\c++;
%MinGW_PATH%\lib\gcc\mingw32\4.5.2\include\c++\backward;
%MinGW_PATH%\lib\gcc\mingw32\4.5.2\include\c++\mingw32;
%MinGW_PATH%\include