09/27: gnu: Add libsigc++-2.

[guix-commits]

dannym pushed a commit to branch master
in repository guix.

commit b3b47dabafbfc828a9ad2bee520c9586ffe763c3
Author: Raghav Gururajan <raghavgururajan@disroot.org>
AuthorDate: Sat Jul 18 03:48:11 2020 -0400

    gnu: Add libsigc++-2.
    
    * gnu/packages/glib.scm (libsigc++-2): New variable.
    
    Signed-off-by: Danny Milosavljevic <dannym@scratchpost.org>
---
 gnu/packages/glib.scm | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/gnu/packages/glib.scm b/gnu/packages/glib.scm
index 9f0721b..a46129d 100644
--- a/gnu/packages/glib.scm
+++ b/gnu/packages/glib.scm
@@ -619,6 +619,21 @@ It also contains adaptor classes for connection of 
dissimilar callbacks and
 has an ease of use unmatched by other C++ callback libraries.")
     (license license:lgpl2.1+)))
 
+(define-public libsigc++-2
+  (package
+    (inherit libsigc++)
+    (name "libsigc++")
+    (version "2.10.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri
+        (string-append "mirror://gnome/sources/libsigc++/"
+                       (version-major+minor version) "/"
+                       name "-" version ".tar.xz"))
+       (sha256
+        (base32 "11j7j1jv4z58d9s7jvl42fnqa1dzl4idgil9r45cjv1w673dys0b"))))))
+
 (define glibmm
   (package
     (name "glibmm")