build: Require Guile >= 2.0.13.

* README, configure.ac, doc/guix.texi (Requirements): Increase minimum
Guile version from 2.0.9 to 2.0.13.
* config-daemon.ac: Remove use of 'GUIX_CHECK_UNBUFFERED_CBIP'.
* m4/guix.m4 (GUIX_CHECK_UNBUFFERED_CBIP): Remove.
* guix/build/download.scm (current-http-proxy): Remove.
* guix/build/syscalls.scm (%libc-errno-pointer, errno): Remove.
(syscall->procedure): Use #:return-errno unconditionally.
* guix/hash.scm (open-sha256-input-port)[unbuffered]: Remove outdated
comment.
* guix/http-client.scm (when-guile<=2.0.5-or-otherwise-broken): Remove.
<top level>: Remove 'when-guile<=2.0.5-or-otherwise-broken' block.
* guix/scripts/substitute.scm (fetch): Remove 'guile-version>?'
conditional.
* tests/hash.scm (supports-unbuffered-cbip?): Remove.
<top level>: Remove 'test-skip' call.

1 files changed, 1 insertions, 10 deletions

diff --git a/tests/hash.scm b/tests/hash.scm
index b189e435c8..b4cf2b61d6 100644
--- a/tests/hash.scm
+++ b/tests/hash.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2013, 2014, 2017 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2013, 2014, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -37,13 +37,6 @@
   (base16-string->bytevector
    "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9"))
 
-(define (supports-unbuffered-cbip?)
-  "Return #t if unbuffered custom binary input ports (CBIPs) are supported.
-In Guile <= 2.0.9, CBIPs were always fully buffered, so the
-'open-sha256-input-port' does not work there."
-  (false-if-exception
-   (setvbuf (make-custom-binary-input-port "foo" pk #f #f #f) _IONBF)))
-
 
 (test-begin "hash")
 
@@ -77,8 +70,6 @@ In Guile <= 2.0.9, CBIPs were always fully buffered, so the
     (equal? (sha256 contents)
             (call-with-input-file file port-sha256))))
 
-(test-skip (if (supports-unbuffered-cbip?) 0 4))
-
 (test-equal "open-sha256-input-port, empty"
   `("" ,%empty-sha256)
   (let-values (((port get)