Can someone tell my how I can find the QT include headers or write an app to do it?

[AI_Messiah]

This is confusing when the examples I have found are for finding more than one file. I just want to know how to find the directory to the QT headers. I know I should confine my search to a compiler path within my QT directory.

[ChrisW67]

If you are doing this to compile a project then both qmake and cmake should look after this for you.

To find out where various parts of a Qt installation are located execute:

qmake -query

using the qmake from the version of Qt you want to interrogate. Example output on my Ubuntu system:

QT_SYSROOT:
QT_INSTALL_PREFIX:/usr
QT_INSTALL_ARCHDATA:/usr/lib/x86_64-linux-gnu/qt5
QT_INSTALL_DATA:/usr/share/qt5
QT_INSTALL_DOCS:/usr/share/qt5/doc
QT_INSTALL_HEADERS:/usr/include/x86_64-linux-gnu/qt5
QT_INSTALL_LIBS:/usr/lib/x86_64-linux-gnu
QT_INSTALL_LIBEXECS:/usr/lib/x86_64-linux-gnu/qt5/libexec
QT_INSTALL_BINS:/usr/lib/qt5/bin
QT_INSTALL_TESTS:/usr/tests
QT_INSTALL_PLUGINS:/usr/lib/x86_64-linux-gnu/qt5/plugins
QT_INSTALL_IMPORTS:/usr/lib/x86_64-linux-gnu/qt5/imports
QT_INSTALL_QML:/usr/lib/x86_64-linux-gnu/qt5/qml
QT_INSTALL_TRANSLATIONS:/usr/share/qt5/translations
QT_INSTALL_CONFIGURATION:/etc/xdg
QT_INSTALL_EXAMPLES:/usr/lib/x86_64-linux-gnu/qt5/examples
QT_INSTALL_DEMOS:/usr/lib/x86_64-linux-gnu/qt5/examples
QT_HOST_PREFIX:/usr
QT_HOST_DATA:/usr/lib/x86_64-linux-gnu/qt5
QT_HOST_BINS:/usr/lib/qt5/bin
QT_HOST_LIBS:/usr/lib/x86_64-linux-gnu
QMAKE_SPEC:linux-g++
QMAKE_XSPEC:linux-g++
QMAKE_VERSION:3.1
QT_VERSION:5.12.8