1 Added diff to change _SC_CLK_TCK to 2. For some reason,
2 our headers don't define _SC_CLK_TCK. (they probably should)
4 Commented out -DHAS_ERRLIST from CFLAGS_EXTRA, since
5 our headers don't seem to provide sys_nerr, sys_errlist.
7 Changed SRC to CPPSRC in Makefile.