- AC_SEARCH_LIBS(clock_gettime, [rt posix4])
- AC_CHECK_FUNCS(clock_gettime)
+
+ # Save and restore LIBS so e.g., -lrt, isn't added to it. Otherwise, *all*
+ # programs in the package would end up linked with that potentially-shared
+ # library, inducing unnecessary run-time overhead.
+ fetish_saved_libs=$LIBS
+ AC_SEARCH_LIBS(clock_gettime, [rt posix4],
+ [LIB_CLOCK_GETTIME=$ac_cv_search_clock_gettime])
+ AC_SUBST(LIB_CLOCK_GETTIME)
+ AC_CHECK_FUNCS(clock_gettime)
+ LIBS=$fetish_saved_libs