When compiling get error: 'QtGui/QAction' file not found #include <QtGui/QAction>
c++, macos, qt
Solution
In Qt5, `QAction` header is in `QtWidgets` include sub-directory, not in `QtGui` (that's true for Qt4). Though you don't actually need to specify include sub-directories since `qmake` will handle that for you. You just need to add `QT += widgets` to your `.pro` file.
Problem
I just installed Mac OS X 10.8.3 and Qt Creator 3, XCode, and XCode command line tools. I'm trying to compile a project that works on another computer but each time I go to "build all" I get `error: 'QtGui/QAction' file not found` in `#include <QtGui/QAction>` I tried adding the second and third line in the .pro file but it didn't help ``` QT += core gui opengl CONFIG += qt QT += gui TARGET = BasicOpenGL TEMPLATE = app ``` UPDATE: I also tried this .pro file and it didn't work ``` QT += core gui opengl QT += widgets TARGET = BasicOpenGL TEMPLATE = app ``` I should say this is my first time attempting development on mac. Compile Output from Qt ``` Versions/A/Headers -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/AGL.framework/Headers -I. -I. -F/Users/john/Qt/5.2.0/clang_64/lib -o mainwindow.o ../Framework/mainwindow.cpp In file included from ../Framework/mainwindow.cpp:2: ../Framework/ui_mainwindow.h:14:10: fatal error: 'QtGui/QAction' file not found #include <QtGui/QAction> ^ 1 error generated. make: *** [mainwindow.o] Error 1 15:51:32: The process "/usr/bin/make" exited with code 2. Error while building/deploying project BasicOpenGL (kit: Desktop Qt 5.2.0 clang 64bit) When executing step 'Make' ``` UPDATE: I got it to work but with all the screwing around I'm not exactly sure what did it. I started with a fresh mac image, installed system updates, installed xcode, installed xcode command line tools, installed QT Creator 3.0, installed QT libraries 4.8.1, setup the compilers in QT Creator.