Re: emacs make error on linux

[Paul Eggert <eggert@cs.ucla.edu>]

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Colin Baxter wrote:
>
> On make I get this error:
>
> gnutls.c: In function ‘Fgnutls_boot’:
> gnutls.c:1605:60: error: ‘GNUTLS_NONBLOCK’ undeclared (first use in this function)

Thanks for reporting that. Although I installed the attached patch to work 
around the compile-time problem, I worry that Emacs's run-time behavior will not 
be correct for asynchronous connections, so I'll CC: this to Ted Zlatanov, our 
GnuTLS expert.

Which version of GnuTLS are you using? That is, what is the output of this shell 
command?

pkg-config --modversion gnutls

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From 2c011946d7eb99c62beb6d1a87cfff52dbb0d45d Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Wed, 3 Aug 2016 07:45:47 -0400
Subject: [PATCH] Port to systems lacking GNUTLS_NONBLOCK
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Problem reported by Colin Baxter in:
http://lists.gnu.org/archive/html/emacs-devel/2016-08/msg00096.html
* src/gnutls.c (Fgnutls_boot): Don’t assume GNUTLS_NONBLOCK is defined.
---
 src/gnutls.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/gnutls.c b/src/gnutls.c
index e3e9311..bc35dfb 100644
--- a/src/gnutls.c
+++ b/src/gnutls.c
@@ -1602,8 +1602,12 @@ one trustfile (usually a CA bundle).  */)
   /* Call gnutls_init here: */
 
   GNUTLS_LOG (1, max_log_level, "gnutls_init");
-  int nonblock = XPROCESS (proc)->is_non_blocking_client ? GNUTLS_NONBLOCK : 0;
-  ret = gnutls_init (&state, GNUTLS_CLIENT | nonblock);
+  int gnutls_flags = GNUTLS_CLIENT;
+#ifdef GNUTLS_NONBLOCK
+  if (XPROCESS (proc)->is_non_blocking_client)
+    gnutls_flags |= GNUTLS_NONBLOCK;
+#endif
+  ret = gnutls_init (&state, gnutls_flags);
   XPROCESS (proc)->gnutls_state = state;
   if (ret < GNUTLS_E_SUCCESS)
     return gnutls_make_error (ret);
-- 
2.5.5