CLK_TCK           517 ext/auxsys/auxsyslib.c #ifdef CLK_TCK
CLK_TCK           518 ext/auxsys/auxsyslib.c   SCM_APPEND1(h, t, Scm_MakeInteger(CLK_TCK)); /* older name */
CLK_TCK           316 gc/include/private/gc_priv.h #     define CLOCKS_PER_SEC CLK_TCK