# ------------------------------------------------------------------------------
-AC_SEARCH_LIBS([dlsym], [dl], [], [AC_MSG_ERROR([*** Dynamic linking loader library not found])])
AC_CHECK_HEADERS([sys/capability.h], [], [AC_MSG_ERROR([*** POSIX caps headers not found])])
AC_CHECK_HEADERS([linux/btrfs.h], [], [])
AC_CHECK_HEADERS([linux/memfd.h], [], [])