gcc.c (execute): For -### don't quote arguments that contain just alphanumerics and _/-.

	* gcc.c (execute): For -### don't quote arguments that
	contain just alphanumerics and _/-. characters.
	* doc/invoke.texi: Document that change for -###.

From-SVN: r159255

gcc/ChangeLog

 2010-05-11  Jakub Jelinek  <jakub@redhat.com>
 
+	* gcc.c (execute): For -### don't quote arguments that
+	contain just alphanumerics and _/-. characters.
+	* doc/invoke.texi: Document that change for -###.
+
 	PR debug/44023
 	* df-problems.c (struct dead_debug): Add to_rescan field.
 	(dead_debug_init): Clear to_rescan field.

gcc/doc/invoke.texi

@@ -1172,9 +1172,9 @@ program and of the preprocessor and the compiler proper.
 
 @item -###
 @opindex ###
-Like @option{-v} except the commands are not executed and all command
-arguments are quoted.  This is useful for shell scripts to capture the
-driver-generated command lines.
+Like @option{-v} except the commands are not executed and arguments
+are quoted unless they contain only alphanumeric characters or @code{./-_}.
+This is useful for shell scripts to capture the driver-generated command lines.
 
 @item -pipe
 @opindex pipe

gcc/gcc.c

@@ -3020,14 +3020,23 @@ execute (void)
 	      for (j = commands[i].argv; *j; j++)
 		{
 		  const char *p;
-		  fprintf (stderr, " \"");
 		  for (p = *j; *p; ++p)
+		    if (!ISALNUM ((unsigned char) *p)
+			&& *p != '_' && *p != '/' && *p != '-' && *p != '.')
+		      break;
+		  if (*p || !*j)
 		    {
-		      if (*p == '"' || *p == '\\' || *p == '$')
-			fputc ('\\', stderr);
-		      fputc (*p, stderr);
+		      fprintf (stderr, " \"");
+		      for (p = *j; *p; ++p)
+			{
+			  if (*p == '"' || *p == '\\' || *p == '$')
+			    fputc ('\\', stderr);
+			  fputc (*p, stderr);
+			}
+		      fputc ('"', stderr);
 		    }
-		  fputc ('"', stderr);
+		  else
+		    fprintf (stderr, " %s", *j);
 		}
 	    }
 	  else