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.

#include <stdarg.h>

extern void putchar();

int
printf(char *fmt, ...)
{
	va_list ap;
	int len;

	va_start(ap, fmt);
	len = _doprnt(fmt, ap, &putchar);
	va_end(ap);
	return(len);
}