gnu: Add tllist.

* gnu/packages/datastructures.scm (tllist): New public variable.

gnu/packages/datastructures.scm

@@ -4,6 +4,7 @@
 ;;; Copyright © 2018 Meiyo Peng <meiyo.peng@gmail.com>
 ;;; Copyright © 2019, 2020 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2020 Mark H Weaver <mhw@netris.org>
+;;; Copyright © 2020 Marius Bakke <marius@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -24,13 +25,15 @@
   #:use-module (gnu packages)
   #:use-module (gnu packages autotools)
   #:use-module (gnu packages boost)
+  #:use-module (gnu packages build-tools)   ;for meson-0.55
   #:use-module (gnu packages perl)
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (guix packages)
   #:use-module (guix download)
   #:use-module (guix git-download)
   #:use-module (guix build-system cmake)
-  #:use-module (guix build-system gnu))
+  #:use-module (guix build-system gnu)
+  #:use-module (guix build-system meson))
 
 (define-public gdsl
   (package
@@ -280,6 +283,28 @@ complexity of an operation performed on the classical data structure and the
 equivalent succinct data structure are (most of the time) identical.")
     (license license:gpl3+)))
 
+(define-public tllist
+  (package
+    (name "tllist")
+    (version "1.0.4")
+    (home-page "https://codeberg.org/dnkl/tllist")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference (url home-page) (commit version)))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "1a26vwb7ll6mv3h8rbafsdx4vic1f286hiqn8s359sw8b7yjkvzs"))))
+    (build-system meson-build-system)
+    (arguments
+     `(#:meson ,meson-0.55))
+    (synopsis "Typed link list for C")
+    (description
+     "@code{tllist} is a @dfn{typed linked list} C header file only library
+implemented using pre-processor macros.  It supports primitive data types as
+well as aggregated ones such as structs, enums and unions.")
+    (license license:expat)))
+
 (define-public libdivsufsort
   (package
     (name "libdivsufsort")