In make(1), set_times() is utimes(2) by another name.  set_times() has
only one caller: Job_Touch().  Setting atime/mtime to the current time
with utimes(2) is not cumbersome.

So, remove set_times() and call utimes(2) directly.

ok?

Index: engine.c
===================================================================
RCS file: /cvs/src/usr.bin/make/engine.c,v
diff -u -p -r1.73 engine.c
--- engine.c	4 Sep 2023 11:35:11 -0000	1.73
+++ engine.c	9 Apr 2024 00:12:37 -0000
@@ -262,7 +262,7 @@ Job_Touch(GNode *gn)
 	} else {
 		const char *file = gn->path != NULL ? gn->path : gn->name;
 
-		if (set_times(file) == -1){
+		if (utimes(file, NULL) == -1){
 			if (rewrite_time(file) == -1) {
 				(void)fprintf(stderr,
 				    "*** couldn't touch %s: %s", file,
Index: timestamp.c
===================================================================
RCS file: /cvs/src/usr.bin/make/timestamp.c,v
diff -u -p -r1.11 timestamp.c
--- timestamp.c	4 Sep 2023 11:35:11 -0000	1.11
+++ timestamp.c	9 Apr 2024 00:12:37 -0000
@@ -33,12 +33,6 @@
 
 struct timespec starttime;
 
-int
-set_times(const char *f)
-{
-    return utimes(f, NULL);
-}
-
 #define PLACEHOLDER "XXXXXXXXX "
 char *
 time_to_string(struct timespec *t)
Index: timestamp.h
===================================================================
RCS file: /cvs/src/usr.bin/make/timestamp.h,v
diff -u -p -r1.11 timestamp.h
--- timestamp.h	19 Aug 2023 04:21:06 -0000	1.11
+++ timestamp.h	9 Apr 2024 00:12:37 -0000
@@ -39,10 +39,6 @@
  * ts_set_from_time_t(d, t):	create timestamp from time_t.
  */
 
-/* sysresult = set_times(name):	set modification times on a file.
- * 				system call results.
- */
-
 #define Init_Timestamp()	clock_gettime(CLOCK_REALTIME, &starttime)
 
 #define TMIN (sizeof(time_t) == sizeof(int32_t) ? INT32_MIN : INT64_MIN)
@@ -63,8 +59,6 @@ do { \
 	if (is_out_of_date(t)) \
 		(t).tv_nsec++; \
 } while (0)
-
-extern int set_times(const char *);
 
 extern struct timespec starttime;	/* The time at the start 
 					 * of this whole process */