list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_POSIX_C_SOURCE=200809L)
list(APPEND CMAKE_REQUIRED_DEFINITIONS -D__XSI_VISIBLE=500)
list(APPEND CMAKE_REQUIRED_LIBRARIES pthread)
check_symbol_exists(pthread_mutexattr_setrobust pthread.h HAVE_ROBUST_MUTEX)

if (HAVE_ROBUST_MUTEX)
  set(DISABLE_ROBUST_MUTEXES FALSE CACHE BOOL "Disable robust mutex support")
  if (NOT DISABLE_ROBUST_MUTEXES)
    message(STATUS "Robust mutex support enabled")
    set(HAVE_ROBUST_MUTEX TRUE)
  else ()
    message(STATUS "Robust mutex support disabled by user")
    unset(HAVE_ROBUST_MUTEX)
  endif ()
else()
  message(STATUS "Robust mutex support not available")
  unset(HAVE_ROBUST_MUTEX)
endif ()