gnu: Add libdivsufsort.

* gnu/packages/bioinformatics.scm (libdivsufsort): New variable.

gnu/packages/bioinformatics.scm

@@ -11132,3 +11132,31 @@ code that is used in the Cufflinks codebase.  The goal of this library is to
 provide this functionality without the necessity of drawing in a heavy-weight
 dependency like SeqAn.")
     (license (license:x11-style "http://www.boost.org/LICENSE_1_0.txt"))))
+
+(define-public libdivsufsort
+  (package
+    (name "libdivsufsort")
+    (version "2.0.1")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/y-256/libdivsufsort.git")
+                    (commit version)))
+              (sha256
+               (base32
+                "0fgdz9fzihlvjjrxy01md1bv9vh12rkgkwbm90b1hj5xpbaqp7z2"))))
+    (build-system cmake-build-system)
+    (arguments
+     '(#:tests? #f                      ; there are no tests
+       #:configure-flags
+       ;; Needed for rapmap and sailfish.
+       '("-DBUILD_DIVSUFSORT64=ON")))
+    (home-page "https://github.com/y-256/libdivsufsort")
+    (synopsis "Lightweight suffix-sorting library")
+    (description "libdivsufsort is a software library that implements a
+lightweight suffix array construction algorithm.  This library provides a
+simple and an efficient C API to construct a suffix array and a
+Burrows-Wheeler transformed string from a given string over a constant-size
+alphabet.  The algorithm runs in O(n log n) worst-case time using only 5n+O(1)
+bytes of memory space, where n is the length of the string.")
+    (license license:expat)))