Ubuntu18安装Qt4.8.6+QtCreate4.12

下载安装包

http://download.qt.io/official_releases/qtcreator/4.12/4.12.0/qt-creator-opensource-linux-x86_64-4.12.0.run

http://download.qt.io/archive/qt/4.8/4.8.6/qt-everywhere-opensource-src-4.8.6.tar.gz

ubuntu18 gcc版本为8，会导致编译错误

Makefile:1624: recipe for target 'obj/release/pcre_exec.o' failed
make[1]: *** [obj/release/pcre_exec.o] Error 1
make[1]: 离开目录“/home/dhtc/qt-everywhere-opensource-src-4.8.6/src/script”
Makefile:565: recipe for target 'sub-script-make_default-ordered' failed
make: *** [sub-script-make_default-ordered] Error 2

 安装gcc ， g++ 4.8版本

sudo apt-get install gcc-4.8

sudo apt-get install g++-4.8

添加编译器版本控制选项

sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 20 
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 30 

删除命令为

sudo update-alternatives --remove gcc /usr/bin/g++-8
sudo update-alternatives --remove gcc /usr/bin/g++-4.8

 

切换不同版本gcc g++命令

sudo update-alternatives --config gcc

编译Qt4.8.6

./configure 
make
make install

默认安装路径为/usr/local/Trolltech/Qt-4.8.6

安装QtCreator4.12

./qt-creator-opensource-linux-x86_64-4.12.0.run

配置编译器
工具-》选项-》 Kits
Qt Version 添加/usr/local/Trolltech/Qt-4.8.6/bin/qmake
Kits-》桌面默认Qt version 选择Qt 4.8.6

创建项目
编译报错/home/dhtc/test1/mainwindow.h:15: error: ‘nullptr’ was not declared in this scope
老版本不支持，修改 nullptr为 NULL