gnu: Add readstat.

* gnu/packages/statistics.scm (readstat): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/statistics.scm

@@ -5904,3 +5904,31 @@ (define-public emacs-ess
 is designed to support editing of scripts and interaction with various
 statistical analysis programs such as R, Julia, and JAGS.")
       (license license:gpl3+))))
+
+(define-public readstat
+  (package
+    (name "readstat")
+    (version "1.1.5")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/WizardMac/ReadStat")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "00sdmaq0qzp6kyv53fpfi6jf3iv4pd0ap0gmw3mbfip52bbnl55w"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("autoconf" ,autoconf)
+       ("automake" ,automake)
+       ("gettext" ,gnu-gettext)
+       ("libtool" ,libtool)))
+    (inputs
+     `(("zlib" ,zlib)))                 ; libz
+    (synopsis "Convert SAS, Stata, and SPSS files")
+    (description "Command-line tool and C library for reading files from
+popular stats packages like SAS, Stata and SPSS.")
+    (home-page "https://github.com/WizardMac/ReadStat")
+    (license license:expat)))
+