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  1. Qt
  2. QTBUG-96799 Improve pro2cmake so it's usable as an initial step for converting qmake user projects to CMake
  3. QTBUG-98852

set QT_MAJOR_VERSION for cmake

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      qmake projects can have

      # example.pro

QT += core gui

greaterThan(QT_MAJOR_VERSION, 4) {
  QT += widgets
}

      which pro2cmake.py converts to

      # CMakeLists.txt

find_package(Qt6 COMPONENTS Core)
find_package(Qt6 COMPONENTS Gui)

if((QT_MAJOR_VERSION GREATER 4))

    # should be added here by pro2cmake.py
    #find_package(Qt6 COMPONENTS Widgets)

    target_link_libraries(qt6-hello-world PUBLIC
        Qt::Widgets
    )
endif()

      but QT_MAJOR_VERSION is not set

      test:

      # CMakeLists.txt

message("debug: QT_MAJOR_VERSION = ${QT_MAJOR_VERSION}")
message("debug: QT_VERSION = ${QT_VERSION}")
message("debug: QT_PACKAGE_VERSION = ${QT_PACKAGE_VERSION}")
message("debug: QT_DEFAULT_MAJOR_VERSION = ${QT_DEFAULT_MAJOR_VERSION}")

      result:

      debug: QT_MAJOR_VERSION = 
debug: QT_VERSION = 
debug: QT_PACKAGE_VERSION = 
debug: QT_DEFAULT_MAJOR_VERSION = 6

      alternative: in pro2cmake.py, translate QT_MAJOR_VERSION to QT_DEFAULT_MAJOR_VERSION

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            jbornema Joerg Bornemann
            milahu milan hauth
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              Created:
              Updated:
              Resolved:

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