gnu: Add julia-compat.

* gnu/packages/julia-xyz.scm (julia-compat-2.1.0): New variable.

gnu/packages/julia-xyz.scm

@@ -51,3 +51,25 @@
     (description "@code{julia-inifile} is a julia package that defines an
 Inifile type that allows to interface with @file{.ini} files.")
     (license license:expat)))
+
+(define-public julia-compat
+  (package
+    (name "julia-compat")
+    (version "2.2.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/JuliaLang/Compat.jl")
+             (commit (string-append "v" version))))
+       (file-name "Compat")
+       (sha256
+        (base32 "024gqvhabranf398hwhb4m2w3a42kdg9zqj8s4pmjvaal14grw70"))))
+    (build-system julia-build-system)
+    (home-page "https://github.com/JuliaLang/Compat.jl")
+    (synopsis "Compatibility across Julia versions")
+    (description "The Compat package is designed to ease interoperability
+between older and newer versions of the Julia language.  The Compat package
+provides a macro that lets you use the latest syntax in a backwards-compatible
+way.")
+    (license license:expat)))