Makefile hierarchy: CFLAGS override-ability actually works now The original version was broken in that CFLAGS=${CFLAGS} passing was done without quotes, which breaks as soon as there is a space in the user-set CFLAGS. Changing it to CFLAGS="${CFLAGS}" makes it work as originally intended.

char *
index(p, ch)
	register char *p, ch;
{
	for (;; ++p) {
		if (*p == ch)
			return(p);
		if (!*p)
			return((char *)0);
	}
	/* NOTREACHED */
}