[bug#39943] [PATCH v2 3/4] gnu: Add boost-1.69.

[Efraim Flashner <efraim@flashner.co.il>]

* gnu/packages/boost.scm (boost-1.69): New hidden package.
---
 gnu/packages/boost.scm | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/boost.scm b/gnu/packages/boost.scm
index 11fb8e1201..8bf2002adb 100644
--- a/gnu/packages/boost.scm
+++ b/gnu/packages/boost.scm
@@ -9,7 +9,7 @@
 ;;; Copyright © 2018 Arun Isaac <arunisaac@systemreboot.net>
 ;;; Copyright © 2018, 2019 Ricardo Wurmus <rekado@elephly.net>
 ;;; Copyright © 2018 Maxim Cournoyer <maxim.cournoyer@gmail.com>
-;;; Copyright © 2018 Efraim Flashner <efraim@flashner.co.il>
+;;; Copyright © 2018, 2020 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2019 Giacomo Leidi <goodoldpaul@autistici.org>
 ;;;
 ;;; This file is part of GNU Guix.
@@ -195,6 +195,29 @@ across a broad spectrum of applications.")
                    (symlink "libboost_python27.a" "libboost_python.a"))
                  #t)))))))))
 
+(define-public boost-1.69
+  (package
+    (inherit boost)
+    (name "boost")
+    (version "1.69.0")
+    (source (origin
+              (method url-fetch)
+              (uri (let ((version-with-underscores
+                          (string-map (lambda (x) (if (eq? x #\.) #\_ x)) version)))
+                     (list (string-append "mirror://sourceforge/boost/boost/" version
+                                          "/boost_" version-with-underscores ".tar.bz2")
+                           (string-append "https://dl.bintray.com/boostorg/release/"
+                                          version "/source/boost_"
+                                          version-with-underscores ".tar.bz2"))))
+              (sha256
+               (base32
+                "01j4n142dz20lcgqji8d8hspp04p1nv7m8i6dz8w5lchfdhx8clg"))))
+    (arguments
+     (substitute-keyword-arguments (package-arguments boost)
+       ((#:make-flags flags)
+        `(cons* "cxxflags=-std=c++14" ,flags))))
+    (properties '((hidden? . #t)))))
+
 (define-public boost-for-mysql
   ;; Older version for MySQL 5.7.23.
   (package
-- 
2.25.1