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01/01: build: GnuTLS is now a hard dependency.

From: Ludovic Courtès
Subject: 01/01: build: GnuTLS is now a hard dependency.
Date: Sat, 11 Mar 2017 18:40:48 -0500 (EST)

civodul pushed a commit to branch master
in repository guix.

commit 1dbe3a8db0a3e5a8e5f9b30e6f6a6bbfb699275b
Author: Ludovic Courtès <address@hidden>
Date:   Sun Mar 12 00:37:33 2017 +0100

    build: GnuTLS is now a hard dependency.
    Discussed as part of <>.
    * Check for (gnutls) and error out if it's missing.
    * doc/guix.texi (Requirements): Move GnuTLS from optional to required.
    (Substitutes): Remove footnote about the need for GnuTLS.
---  |  9 ++++++++-
 doc/guix.texi | 16 +++++-----------
 2 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/ b/
index 06b0618..e5daadb 100644
--- a/
+++ b/
@@ -91,7 +91,14 @@ dnl Installation directory for .scm and .go files.
-dnl guile-json is used for the PyPI package importer
+dnl The GnuTLS bindings are necessary for substitutes over HTTPS and for 'guix
+dnl pull', among other things.
+GUILE_MODULE_AVAILABLE([have_gnutls], [(gnutls)])
+if test "x$have_gnutls" != "xyes"; then
+  AC_MSG_ERROR([The Guile bindings of GnuTLS are missing; please install 
+dnl Guile-JSON is used in various places.
 GUILE_MODULE_AVAILABLE([have_guile_json], [(json)])
 AM_CONDITIONAL([HAVE_GUILE_JSON], [test "x$have_guile_json" = "xyes"])
diff --git a/doc/guix.texi b/doc/guix.texi
index a602c70..93d0b7a 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -544,6 +544,10 @@ GNU Guix depends on the following packages:
 @item @url{, GNU Guile}, version 2.0.7 or later;
 @item @url{, GNU libgcrypt};
address@hidden://, GnuTLS}, specifically its Guile bindings
+(@pxref{Guile Preparations, how to install the GnuTLS bindings for
+Guile,, gnutls-guile, GnuTLS-Guile});
 @item @url{, GNU Make}.
 @end itemize
@@ -551,15 +555,6 @@ The following dependencies are optional:
-Installing @uref{, GnuTLS-Guile} will allow you to
-access @code{https} URLs for substitutes, which is highly recommended
-(@pxref{Substitutes}).  It also allows you to access HTTPS URLs with the
address@hidden download} command (@pxref{Invoking guix download}), the
address@hidden import pypi} command, and the @command{guix import cpan}
-command.  @xref{Guile Preparations, how to install the GnuTLS bindings
-for Guile,, gnutls-guile, GnuTLS-Guile}.
 @url{, Guile-JSON} will
 allow you to use the @command{guix import pypi} command (@pxref{Invoking
@@ -2003,8 +1998,7 @@ or to client tools such as @command{guix package}
 (@pxref{client-substitute-urls,, client @option{--substitute-urls}
-Substitute URLs can be either HTTP or address@hidden HTTPS access,
-the Guile bindings of GnuTLS must be installed.  @xref{Requirements}.}
+Substitute URLs can be either HTTP or HTTPS.
 HTTPS is recommended because communications are encrypted; conversely,
 using HTTP makes all communications visible to an eavesdropper, who
 could use the information gathered to determine, for instance, whether

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