Changes to build on Linux.

Makefile

@@ -4,7 +4,7 @@
 #
 
 cube-test: cube-test.c
-	cc -Wall -o cube-test cube-test.c
+	$(CC) -Wall -o $@ $<
 
 
 # vim:ft=make

cube-test.c

@@ -30,17 +30,17 @@ read_number() {
   return atoi(buf);
 }
 
-typedef struct timer_struct {
+typedef struct interval_timer_struct {
   struct timeval then;
-} timer_t;
+} interval_timer_t;
 
 void
-start_timer(timer_t *timer) {
+start_timer(interval_timer_t *timer) {
   gettimeofday(&timer->then, NULL);
 }
 
 long int
-end_timer(timer_t *timer) {
+end_timer(interval_timer_t *timer) {
   struct timeval now;
   long int delta;
 
@@ -68,7 +68,7 @@ humanize_usec(long int usec) {
 int
 main(int argc, char *argv[]) {
   int guess, number, iterations = 0, correct = 0;
-  timer_t timer;
+  interval_timer_t timer;
   long int delta, delta_total = 0;
 
   srand(time(NULL));