GTest CMake broken under CMake 2.8

[jeremysalwen]

extras/gtest/CMakeLists.txt fails with

CMake Error at rapidcheck/extras/gtest/CMakeLists.txt:2 (add_library):     
  Cannot find source file:   
         INTERFACE
  Tried extensions .c .C .c++ .cc .cpp .cxx .m .M .mm .h .hh .h++ .hm .hpp .hxx .in .txx     

This is a caused by the using the "INTERFACE" feature which is not available in CMake 2.8.12. However, the CMakeLists.txt in the root declares a minimum version of CMake 2.8.12.

[emil-e]

Do you happen to know when this was added?

[janisozaur]

It surely is present in 3.0: https://cmake.org/cmake/help/v3.0/manual/cmake-buildsystem.7.html#interface-libraries

CMake's online docs only go that far, but it's likely 2.8 was the last major release before 3.0

[janisozaur]

Indeed: https://cmake.org/files/ and https://gitlab.kitware.com/cmake/cmake/tags?page=4&sort=updated_desc confirm it was 2.8.12, then 3.0