plugin.pro Example File

tools/echoplugin/plugin/plugin.pro
 TEMPLATE        = lib
 CONFIG         += plugin
 QT             += widgets
 INCLUDEPATH    += ../echowindow
 HEADERS         = echoplugin.h
 SOURCES         = echoplugin.cpp
 TARGET          = $$qtLibraryTarget(echoplugin)
 DESTDIR         = ../plugins

 EXAMPLE_FILES = echoplugin.json

 # install
 target.path = $$[QT_INSTALL_EXAMPLES]/widgets/tools/echoplugin/plugins
 INSTALLS += target

 CONFIG += install_ok  # Do not cargo-cult this!