From 3c132f10f39f1675607d50f5c75669ec64e13bb5 Mon Sep 17 00:00:00 2001
From: Paul Smith <psmith@gnu.org>
Date: Fri, 7 Jul 2000 17:34:56 +0000
Subject: * Minor code cleanups * Fix for PR/1811, from Paul Eggert.

---
 remake.c | 59 ++++++++++++++++++++++++++++++++++++++---------------------
 1 file changed, 38 insertions(+), 21 deletions(-)

(limited to 'remake.c')

diff --git a/remake.c b/remake.c
index 1ea0df2..0f9f2aa 100644
--- a/remake.c
+++ b/remake.c
@@ -396,6 +396,15 @@ update_file_1 (file, depth)
   noexist = this_mtime == NONEXISTENT_MTIME;
   if (noexist)
     DBF (DB_BASIC, _("File `%s' does not exist.\n"));
+  else
+    {
+#ifndef NO_ARCHIVES
+      /* Avoid spurious rebuilds of archive members due to their
+         timestamp resolution being only one second.  */
+      if (1 < FILE_TIMESTAMPS_PER_S && ar_name (file->name))
+	this_mtime += FILE_TIMESTAMPS_PER_S - 1;
+#endif
+    }
 
   must_make = noexist;
 
@@ -1041,7 +1050,6 @@ f_mtime (file, search)
 
       char *arname, *memname;
       struct file *arfile;
-      time_t memtime;
       int arname_used = 0;
       time_t member_date;
 
@@ -1154,7 +1162,7 @@ f_mtime (file, search)
 	&& mtime != NONEXISTENT_MTIME
 	&& !file->updated)
       {
-	static FILE_TIMESTAMP now;
+	static FILE_TIMESTAMP adjusted_now;
 
 	FILE_TIMESTAMP adjusted_mtime = mtime;
 
@@ -1178,19 +1186,28 @@ f_mtime (file, search)
 	  adjusted_mtime -= adjustment;
 #endif
 
-	/* If the file's time appears to be in the future, udpate our
+	/* If the file's time appears to be in the future, update our
 	   concept of the present and try once more.  */
-	if (now < adjusted_mtime
-	    && (now = file_timestamp_now ()) < adjusted_mtime)
-          {
-	    char mtimebuf[FILE_TIMESTAMP_PRINT_LEN_BOUND + 1];
-	    char nowbuf[FILE_TIMESTAMP_PRINT_LEN_BOUND + 1];
-
-	    file_timestamp_sprintf (mtimebuf, mtime);
-	    file_timestamp_sprintf (nowbuf, now);
-            error (NILF, _("*** Warning: File `%s' has modification time in the future (%s > %s)"),
-                   file->name, mtimebuf, nowbuf);
-            clock_skew_detected = 1;
+	if (adjusted_now < adjusted_mtime)
+	  {
+	    int resolution;
+	    FILE_TIMESTAMP now = file_timestamp_now (&resolution);
+	    adjusted_now = now + (resolution - 1);
+	    if (adjusted_now < adjusted_mtime)
+	      {
+#ifdef NO_FLOAT
+		error (NILF, _("*** Warning: File `%s' has modification time in the future"),
+                       file->name);
+#else
+		double from_now =
+		  (FILE_TIMESTAMP_S (mtime) - FILE_TIMESTAMP_S (now)
+		   + ((FILE_TIMESTAMP_NS (mtime) - FILE_TIMESTAMP_NS (now))
+		      / 1e9));
+		error (NILF, _("*** Warning: File `%s' has modification time %.2g s in the future"),
+		       file->name, from_now);
+#endif
+		clock_skew_detected = 1;
+	      }
           }
       }
   }
@@ -1228,13 +1245,13 @@ name_mtime (name)
 {
   struct stat st;
 
- while (stat (name, &st) != 0)
-   if (errno != EINTR)
-     {
-       if (errno != ENOENT && errno != ENOTDIR)
-         perror_with_name ("stat:", name);
-       return NONEXISTENT_MTIME;
-     }
+  while (stat (name, &st) != 0)
+    if (!EINTR_SET)
+      {
+        if (errno != ENOENT && errno != ENOTDIR)
+          perror_with_name ("stat:", name);
+        return NONEXISTENT_MTIME;
+      }
 
   return FILE_TIMESTAMP_STAT_MODTIME (name, st);
 }
-- 
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