Improve logging when -dm is specified: if the node is considered

out-of-date print not only "modified before source" message
but also the path of youngest source.

3 files changed, 7 insertions, 8 deletions

diff --git a/usr.bin/make/GNode.h b/usr.bin/make/GNode.h
index 382da55..71d2afd 100644
--- a/usr.bin/make/GNode.h
+++ b/usr.bin/make/GNode.h
@@ -170,6 +170,7 @@ typedef struct GNode {
 	int	unmade;		/* The number of unmade children */
 	int	mtime;		/* Its modification time */
 	int	cmtime;		/* Modification time of its youngest child */
+	struct GNode *cmtime_gn;/* Youngest child */
 
 	/*
 	 * Links to parents for which this is an implied source, if any. (nodes
diff --git a/usr.bin/make/make.c b/usr.bin/make/make.c
index 9a39a9e..4ac5bb6 100644
--- a/usr.bin/make/make.c
+++ b/usr.bin/make/make.c
@@ -118,6 +118,7 @@ Make_TimeStamp(GNode *pgn, GNode *cgn)
 
 	if (cgn->mtime > pgn->cmtime) {
 		pgn->cmtime = cgn->mtime;
+		pgn->cmtime_gn = cgn;
 	}
 	return (0);
 }
@@ -223,7 +224,8 @@ Make_OODate(GNode *gn)
 		 * Make does it.
 		 */
 		if (gn->mtime < gn->cmtime) {
-			DEBUGF(MAKE, ("modified before source..."));
+			DEBUGF(MAKE, ("modified before source (%s)...",
+			    gn->cmtime_gn ? gn->cmtime_gn->path : "???"));
 		} else if (gn->mtime == 0) {
 			DEBUGF(MAKE, ("non-existent and no sources..."));
 		} else {
@@ -421,14 +423,9 @@ Make_Update(GNode *cgn)
 			pgn->unmade -= 1;
 
 			if (!(cgn->type & (OP_EXEC | OP_USE))) {
-				if (cgn->made == MADE) {
+				if (cgn->made == MADE)
 					pgn->childMade = TRUE;
-					if (pgn->cmtime < cgn->mtime) {
-						pgn->cmtime = cgn->mtime;
-					}
-				} else {
-					Make_TimeStamp(pgn, cgn);
-				}
+				Make_TimeStamp(pgn, cgn);
 			}
 			if (pgn->unmade == 0) {
 				/*
diff --git a/usr.bin/make/targ.c b/usr.bin/make/targ.c
index fab3189..eac121e 100644
--- a/usr.bin/make/targ.c
+++ b/usr.bin/make/targ.c
@@ -141,6 +141,7 @@ Targ_NewGN(const char *name)
 	gn->childMade = FALSE;
 	gn->order = 0;
 	gn->mtime = gn->cmtime = 0;
+	gn->cmtime_gn = NULL;
 	Lst_Init(&gn->iParents);
 	Lst_Init(&gn->cohorts);
 	Lst_Init(&gn->parents);