CAP_LIBS="$LIBS"
AC_SUBST(CAP_LIBS)
-LIBS=
-AC_SEARCH_LIBS([mq_open], [rt], [], [AC_MSG_ERROR([*** POSIX RT library not found])])
-RT_LIBS="$LIBS"
-AC_SUBST(RT_LIBS)
-LIBS="$save_LIBS"
-
AC_CHECK_FUNCS([memfd_create])
AC_CHECK_FUNCS([__secure_getenv secure_getenv])
AC_CHECK_DECLS([gettid, pivot_root, name_to_handle_at, setns, getrandom, renameat2, kcmp, LO_FLAGS_PARTSCAN],