--- m4-1.4.3.orig/README	2004-08-21 17:29:00.000000000 +0700
+++ m4-1.4.3/README	2005-10-10 13:55:33.000000000 +0700
@@ -25,7 +25,7 @@
 feature which allows for changing the syntax of what is a "word" in
 `m4'.  This might go away, so don't count on it yet.
 
-Send bug reports to address@hidden'.  A bug report is
-an adequate description of the problem: your input, what you expected,
-what you got, and why this is wrong.  Diffs are welcome, but they only
-describe a solution, from which the problem might be uneasy to infer.
+Send bug reports to address@hidden'.  A bug report is an adequate 
+description of the problem: your input, what you expected, what you got, 
+and why this is wrong.  Diffs are welcome, but they only describe a 
+solution, from which the problem might be uneasy to infer.
--- m4-1.4.3.orig/src/m4.c	2005-02-10 03:58:38.000000000 +0700
+++ m4-1.4.3/src/m4.c	2005-10-10 13:52:11.000000000 +0700
@@ -263,6 +263,7 @@
   macro_definition *tail;
   macro_definition *new;
   int optchar;			/* option character */
+  int retcode = EXIT_SUCCESS;
 
   macro_definition *defines;
   FILE *fp;
@@ -484,6 +485,14 @@
 	    if (fp == NULL)
 	      {
 		error (0, errno, "%s", argv[optind]);
+		/*
+		 * In order not to break existing applications that may
+		 * depend on m4 continuing past non-existent files, I
+		 * have decided to have m4 keep going as it always has
+		 * past errors, but I make the final exit code be
+		 * EXIT_FAILURE in this case.
+		 */
+		retcode = EXIT_FAILURE;
 		continue;
 	      }
 	    else
@@ -506,5 +515,5 @@
       undivert_all ();
     }
 
-  exit (EXIT_SUCCESS);
+  exit (retcode);
 }