From:	Andris Pavenis <pavenis AT latnet DOT lv>
To:	djgpp-workers AT delorie DOT com, DJ Delorie <dj AT delorie DOT com>
Subject:	Re: Binutils bug causes GCC bootstrap comparision failures
Date:	Wed, 11 Jun 2003 11:21:49 +0300
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Cc:	djgpp-workers AT delorie DOT com
References:	<200306052334 DOT 12918 DOT pavenis AT latnet DOT lv> <200306052058 DOT h55KwFM6020876 AT envy DOT delorie DOT com>
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Reply-To:	djgpp-workers AT delorie DOT com

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On Thursday 05 June 2003 23:58, DJ Delorie wrote:
> This sounds like the usual MS-DOS "fill seeks with garbage" bug.

Seems like that. 

Attached ugly "brute force" patch seems to workaround problem. It doesn't look 
very nice, and I have done only a very limitted testing with GAS only and I 
didn't saw the problem any more.

Maybe we should consider this or something similar for DJGPP port of binutils.
Patch is against binutils-2.13.92. I was too lazy to handle SEEK_CURR, so only
SEEK_SET is supported.

Andris

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--- binutl-2.1392/bfd/bfdio.c~1	2002-11-18 16:37:52.000000000 +0000
+++ binutl-2.1392/bfd/bfdio.c	2003-06-10 20:51:20.000000000 +0000
@@ -325,6 +325,25 @@
   if (direction == SEEK_SET && abfd->my_archive != NULL)
     file_position += abfd->origin;
 
+#ifdef __DJGPP__
+  if (direction == SEEK_SET)
+    {
+        result = fseek (f, 0, SEEK_END);
+        if (result < file_position)
+        {
+            char tmp[128];
+            int length, len2;
+            memset (tmp, 0, 128);
+            length = file_position - result;
+            while (length > 0)
+              {
+                  int len2 = length>128 ? 128 : length;
+                  fwrite (tmp, 1, len2, f);
+		  length -= len2;
+              }
+        }
+    }
+#endif
   result = fseek (f, file_position, direction);
   if (result != 0)
     {

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