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Date:	Tue, 18 May 2010 18:16:38 +0900 (JST)
From:	Tatsuro MATSUOKA <tmacchant2 AT yahoo DOT co DOT jp>
Reply-To:	matsuoka AT nuce DOT nagoya-u DOT ac DOT jp
Subject:	Re: [ANNOUNCEMENT] Updated: {gd/libgd2/libgd-devel}-2.0.36RC1-11: An open source code library for the dynamic creation of images.
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Hello

I'm glad to see that libgd2 is updated to fix the fontconfig related bug.

I aplogized that I have not told that gd_png.c should be modified 
when linking with the libpng-1.4, which is current release of the libpng.

The gd_png.c in gd-2.0.36RC1 uses the function png_check_sig in the libpng-1.2 or earlier.
However the png_check_sig is removed from the libpng-1.4.

In the libpng-1.4.1.txt in the libpng-1.4 source from the line 3007,
one finds the following
***********************************
The function
    png_check_sig(sig, num)
was replaced with
    !png_sig_cmp(sig, 0, num)
It has been deprecated since libpng-0.90.
***********************************

Therefore the patch will below is required for when linking with the libpng-1.4.
************************************************
--- gd_png.c.orig	2007-11-27 17:30:34 +0900
+++ gd_png.c	2010-03-10 10:32:06 +0900
@@ -151,7 +151,7 @@
 	return NULL;
   }
 
-	if (!png_check_sig (sig, 8)) { /* bad signature */
+	if (png_sig_cmp(sig, 0, 8) != 0) { /* bad signature */
     	return NULL;		/* bad signature */
 	}
***************************************** 
Currently the version of the linpng in cygwin is 1.2 so that png_check_sig does not cause error.

When the libpng on the cygwin will updated, please apply the above patch and update libgd. 

I wrote the above for your information.

Regards

Tatsuro

--- "Dr. Volker Zell" <dr DOT volker DOT zell AT oracle DOT com> wrote:

> Hi
> 
> New versions of 'gd/libgd2/libgd-devel' have been uploaded to a server near you.
> 
> 
> Cygwin NEWS:
> ============
> 
>  o Fixed bug for the treatment of fontconfig libraries
> 
> 
>  
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