cmake HAVE_GCC_ERROR_RETURN_TYPE examples

Kitware/ParaView CMake/ParaViewCompilerExtraFlags.cmake :24 

check_cxx_compiler_flag(-Werror=return-type HAVE_GCC_ERROR_RETURN_TYPE)

Kitware/VTK CMake/vtkCompilerExtraFlags.cmake :10 

check_cxx_compiler_flag(-Werror=return-type HAVE_GCC_ERROR_RETURN_TYPE)

OpenChemistry/avogadroapp cmake/CompilerFlags.cmake :10 

check_cxx_compiler_flag("-Werror=return-type" HAVE_GCC_ERROR_RETURN_TYPE)