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bug#8825: 24.0.50; Problem with builtin gnutls on Windows

From: nyc4bos
Subject: bug#8825: 24.0.50; Problem with builtin gnutls on Windows
Date: Tue, 14 Jun 2011 19:28:37 -0400

Sean Sieger <address@hidden> writes:

> address@hidden writes:
>     I have the DLL libgnutls-26.dll in my PATH as well as in `exec-path`.
> Does the `26' refer to the version?  The binary is built against
> gnutls.h of version 2.10.

This DLL is from gnutls-2.10.1.zip which was obtained from
http://josefsson.org/gnutls4win.  This is the location you are
sent to when you click on the "windows" link on the page

Inside the ZIP file, among other files, is libgnutls-26.dll.

I also tried the previous version, gnutls-2.10.0.zip, which is the
one I think you said you had, with the same result.

Both gnutls.h files from 2.10.1 and 2.10.0 were identical except


I'm begining to think that the problem is in the way that gnutls
is called and/or its error handling.

When I try the test from the *scratch* buffer:

(require 'gnutls)
(open-gnutls-stream "tls" "tls-buffer" "imap.aim.com" "imaps")

I get the *Backtrace* error:

Debugger entered--Lisp error: (void-function gnutls-boot)
  gnutls-boot(#<process tls> gnutls-x509pki (:priority "NORMAL" :hostname 
"imap.aim.com" :loglevel 0 :trustfiles nil :crlfiles nil :keylist nil 
:verify-flags nil :verify-error nil :verify-hostname-error nil :callbacks nil))
  gnutls-negotiate(:process #<process tls> :type gnutls-x509pki :hostname 
  open-gnutls-stream("tls" "tls-buffer" "imap.aim.com" "imaps")
  eval((open-gnutls-stream "tls-" "tls-buffer" "imap.aim.com" "imaps") nil)
  call-interactively(eval-print-last-sexp nil nil)
  debug(error (void-function gnutls-boot))

But I do get the 'tls-buffer' and a TCP ESTABLISHED connection:

I did get in `process-list':

tls             open    tls-buffer      --           (network connection to 

I also got an ESTALISHED TCP connection:


The `tls-buffer' is empty for a while and then when it timesout it

Process tls connection broken by remote peer

Gnus gets the same "void: gnutls-boot" error:

Opening nnimap server on aol...
Opening connection to imap.aim.com via tls...
Unable to open server nnimap+aol due to: Symbol's function definition is void: 
Opening nnimap server on aol...failed: 

Is it the handshaking that is failing?

I turned on debugging '(setq gnutls-log-level 1)' but got no debugging
information in the *Messages* buffer.

Juanma said he successfully built Emacs 24 on Windows and was able
to test builtin gnutls.


Are you using the libgnutls-26.dll in gnutls-2.10.1.zip (or
gnutls-2.10.0.zip) from http://josefsson.org/gnutls4win?

Are you linking, explicitly, to a gnutls library when building?

Does libgnutls-26.dll show up when you do the equivalent of ldd
on the emacs.exe binary?

Sean's build is implicitly/dynamically using libgnutls-26.dll.
I believe he only has the gnutls.h file and not any other file
from the gnutls-2.10.0.zip archive.

The variable `dynamic-library-alist' shows:

Value: ((xpm "libxpm.dll" "xpm4.dll" "libXpm-nox4.dll")
 (png "libpng14-14.dll" "libpng14.dll")
 (jpeg "jpeg62.dll" "libjpeg.dll" "jpeg-62.dll" "jpeg.dll")
 (tiff "libtiff3.dll" "libtiff.dll")
 (gif "giflib4.dll" "libungif4.dll" "libungif.dll")
 (svg "librsvg-2-2.dll")
 (gdk-pixbuf "libgdk_pixbuf-2.0-0.dll")
 (glib "libglib-2.0-0.dll")
 (gobject "libgobject-2.0-0.dll")
 (gnutls "libgnutls-26.dll"))

I'm on Windows XP, if it matters.


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