message: cmake: disable HAVE_POSIX_SEMAPHORES on Apple platform
diff: project(openexr CXX)
  if(UNIX)
  - set(HAVE_PTHREAD 1)
  + if(APPLE)
  + set(HAVE_POSIX_SEMAPHORES 0) # Unnamed semaphores are not supported: https://github.com/opencv/opencv/issues/9361
  + else()
  include(CheckIncludeFile)
  check_include_file(semaphore.h HAVE_POSIX_SEMAPHORES)
  endif()
  +endif()
  configure_file("${CMAKE_CURRENT_SOURCE_DIR}/IlmBaseConfig.h.cmakein"
  "${CMAKE_CURRENT_BINARY_DIR}/IlmBaseConfig.h" @ONLY)
  