I have a C++ header file which has the following lines:
#include <QXmlSimpleReader> #include <QXmlDefaultHandler> and my cmake has the following lines:
find_package(Qt5Core REQUIRED) find_package(Qt5Widgets REQUIRED) find_package(Qt5Xml REQUIRED) When running CMake I get the following error message:
QXmlSimpleReader: No such file or directory #include <QXmlSimpleReader> What am I doing wrong?
For some reason it do not adds to project include dirs.
Add this one to your cmake
INCLUDE_DIRECTORIES( ${Qt5Xml_INCLUDE_DIRS} ) I guess you forgot to link against Qt5xml. A working example from the documentation for cmake 2.8.11 and later, modified to link against Qt5Xml:
cmake_minimum_required(VERSION 2.8.11) project(testproject) # Find includes in corresponding build directories set(CMAKE_INCLUDE_CURRENT_DIR ON) # Instruct CMake to run moc automatically when needed. set(CMAKE_AUTOMOC ON) # Find the QtWidgets library find_package(Qt5Xml) # Tell CMake to create the helloworld executable add_executable(helloworld WIN32 main.cpp) # Use the Widgets module from Qt 5. target_link_libraries(helloworld Qt5::Xml) 
<qt_root_dir>/lib/cmake/Qt5Core/Qt5CoreConfig.cmake: search for a call to add_library. Note that you can generate such a file by installing exports.