D23789: Add ECMGenerateExportHeader, for improved handling of deprecated API

[Friedrich W. H. Kossebau]

kossebau updated this revision to Diff 67620.
kossebau marked an inline comment as done.
kossebau added a comment.


  switch to do generation-time decision about deprecated(text) attribute usage
  
  GCC/Clang are mostly ABI-compatible, so mixing and linking of artifacts from
  both compilers can be expected, so headers should be compatible, too. Though
  the compiler versions officially supported for KF (and thus ECM)* both
  support __attribute__ ((__deprecated__(text))), so it can be hardcoded into
  the generated header without triggering incompatibilities.
  On Windows mixing compilers seems not expected, so compiler detected at
  generation time can also be expected at any further header usage time.
  
  - https://community.kde.org/Frameworks/Policies#Frameworks_compiler_requirements_and_C.2B.2B11

REPOSITORY
  R240 Extra CMake Modules

CHANGES SINCE LAST UPDATE
  https://phabricator.kde.org/D23789?vs=67584&id=67620

BRANCH
  addgenerateexportheader

REVISION DETAIL
  https://phabricator.kde.org/D23789

AFFECTED FILES
  docs/module/ECMGenerateExportHeader.rst
  modules/ECMGenerateExportHeader.cmake
  tests/CMakeLists.txt
  tests/ECMGenerateExportHeaderTest/CMakeLists.txt
  tests/ECMGenerateExportHeaderTest/consumer/CMakeLists.txt
  tests/ECMGenerateExportHeaderTest/consumer/main.cpp
  tests/ECMGenerateExportHeaderTest/consumer/testAPI_DISABLE_DEPRECATED_BEFORE_AND_AT.cmake
  tests/ECMGenerateExportHeaderTest/consumer/testAPI_NO_DEPRECATED.cmake
  tests/ECMGenerateExportHeaderTest/format_version/CMakeLists.txt
  tests/ECMGenerateExportHeaderTest/format_version/main.cpp
  tests/ECMGenerateExportHeaderTest/library/CMakeLists.txt
  tests/ECMGenerateExportHeaderTest/library/library.cpp
  tests/ECMGenerateExportHeaderTest/library/library.hpp
  tests/ECMGenerateExportHeaderTest/library/main.cpp

To: kossebau, #frameworks, #build_system
Cc: chehrlic, dfaure, cgiboudeaux, kde-frameworks-devel, kde-buildsystem, LeGast00n, GB_2, bencreasy, michaelh, ngraham, bruns
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