D24841: Use modern way to set the C/CXX standad

[Hannah von Reth]

vonreth updated this revision to Diff 68478.
vonreth added a comment.


  CMAKE_CXX_STANDARD_REQUIRED

REPOSITORY
  R240 Extra CMake Modules

CHANGES SINCE LAST UPDATE
  https://phabricator.kde.org/D24841?vs=68475&id=68478

BRANCH
  cmake_c_standard

REVISION DETAIL
  https://phabricator.kde.org/D24841

AFFECTED FILES
  kde-modules/KDECompilerSettings.cmake

To: vonreth, dfaure, cullmann
Cc: chehrlic, kde-frameworks-devel, kde-buildsystem, LeGast00n, GB_2, 
bencreasy, michaelh, ngraham, bruns