D17043: Fix the Qt doc creation with Qt 5.12.

[Christophe Giboudeaux]

cgiboudeaux created this revision.
Herald added projects: Frameworks, Build System.
Herald added subscribers: kde-buildsystem, kde-frameworks-devel.
cgiboudeaux requested review of this revision.

REVISION SUMMARY
  In Qt >= 5.12, the qhelpgenerator and qcollectiongenerator tools were fused, only qhelpgenerator remains.
  
  Allow using ECMQueryQmake inside ECM.
  
  Due to project(ECM) specifying the "NONE" language, find_package(Qt5Core)
  cannot succeed.
  
  if the Qt5::qmake target doesn't exist, we now look for the qmake executable.
  
  Add FindExiv2.cmake to ECM
  
  According to lxr, we have 8 copies of this module in different repositories (+kdelib4support and a playground repo).

REPOSITORY
  R240 Extra CMake Modules

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D17043

AFFECTED FILES
  attic/modules/FindExiv2.cmake
  cmake/FindQHelpGenerator.cmake
  docs/CMakeLists.txt
  docs/find-module/FindExiv2.rst
  find-modules/FindExiv2.cmake
  modules/ECMQueryQmake.cmake

To: cgiboudeaux
Cc: kde-frameworks-devel, kde-buildsystem, michaelh, ngraham, bruns
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