qt6-macros-20220329-150500.1.1

- Set CMAKE_MESSAGE_LOG_LEVEL in %cmake_qt6.
  The Qt 6.3 build system sets it to 'NOTICE' for non-developers
  builds, which doesn't permit finding missing build dependencies.
- Define %_qt6_pkgconfigdir. Qt 6.4 will install pkgconfig files.

- Ensure PIE flags are passed to the linker on Leap to work around
  an issue caused by GCC packaging (boo#1195628)

- Update to 6.2.0-rc

- Simplify the %cmake_qt6 macro.
  QtBuildInternalsExtra.cmake, installed by qt6-base-common-devel
  sets a couple variables and installation directories. We only
  need to define those when building qt6-base. With this change,
  CMake will stop reporting unused variables are defined when
  building 3rd party packages (except QT_DISABLE_RPATH).
- Remove extra escaping in macros.qt6.

- Work around QTBUG-93100 and use GCC 10 for Leap 15.2 and 15.3.

- Remove the module name from the docs build targets.
  The modules now have 'docs' and 'install_docs' build targets.

- Add a %pre scriplet for QCH doc packages.
  Starting with 6.0.1, the qch files are installed directly into %_qt6_docdir
  instead of %_qt6_docdir/<qch doc>.qch/.
  RPM can't upgrade packages if a directory is replaced by something
  else, we need a %pre scriptlet that will remove existing folders.

- Doc update.

- Handle _multibuild for documentation packages.
  It is now possible to replace -docs spec files with a
  _multibuild file and the new macros:
  * %qt6_flavor <flavor> in the spec header
  * '%if %qt6_docs_flavor' and '%if !%qt6_docs_flavor' to
    enable/disable spec file blocks.

- Change the executable symlinks suffix from '-qt6' to '6'
  To allow coinstallation, upstream plans to append '6' to user
  facing programs and move the other ones into %_qt6_libexecdir
  (QTBUG-89170)

- Transfer folders ownership to qt6-base, qt6-declarative
  and -docs subpackages.
- Require cmake