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1、交叉编译完QT后编写一个程序 #include <QApplication> #include <QDebug> int main(int argc,char *argv[]) {         QApplication app(argc,argv);         qDebug()<<"hello world!";         return app.exec(); } 编译：/home/zhangshaoyan/App/qt-4.8.4-arm/bin/qmake  -project zhangshaoyan@linux-82yu:~/test> /home/zhangshaoyan/App/qt-4.8.4-arm/bin/qmake   QMAKESPEC has not been set, so configuration cannot be deduced. Error processing project file: /home/zhangshaoyan/test/test.pro 导出以下： export QMAKESPEC=/home/zhangshaoyan/App/qt-4.8.4-arm/mkspecs/linux-g++ 再次编译 /home/zhangshaoyan/App/qt-4.8.4-arm/bin/qmake 编译 make arm-linux-g++ -c -pipe -O2 -Wall -W -D_REENTRANT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I../App/qt-4.8.4-arm/mkspecs/linux-g++ -I. -I../App/qt-4.8.4-arm/include/QtCore -I../App/qt-4.8.4-arm/include/QtGui -I../App/qt-4.8.4-arm/include -I. -I. -o test.o test.cpp arm-linux-g++ -Wl,-O1 -Wl,-rpath,/home/zhangshaoyan/App/qt-4.8.4-arm/lib -o test test.o    -L/home/zhangshaoyan/App/qt-4.8.4-arm/lib -lQtGui -L/home/zhangshaoyan/App/qt-4.8.4-arm/lib -lQtNetwork -lQtCore -lpthread 修改qt-4.8.4-arm/mkspec/linux-g++/qmake.conf 这是仿照qt-4.8.4-arm/mkspec/linux-arm-gnueabi-g++/qmake.conf中改写的。 # # qmake configuration for linux-g++ # MAKEFILE_GENERATOR      = UNIX TARGET_PLATFORM         = unix TEMPLATE                = app CONFIG                  += qt warn_on release incremental link_prl gdb_dwarf_index QT                      += core gui QMAKE_INCREMENTAL_STYLE = sublib include(../common/linux.conf) include(../common/gcc-base-unix.conf) include(../common/g++-unix.conf) /*增加开始*/ QMAKE_CC                = arm-linux-gcc QMAKE_CXX               = arm-linux-g++ QMAKE_LINK              = arm-linux-g++ QMAKE_LINK_SHLIB        = arm-linux-g++ QMAKE_AR                = arm-linux-ar cqs QMAKE_OBJCOPY           = arm-linux-objcopy QMAKE_STRIP             = arm-linux-strip /*增加结束*/ load(qt_config)

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