[bug#36692] [PATCH 2/2] gnu: Add GHC 8.6.5

[Robert Vollmert <rob@vllmrt.net>]

This is exactly like GHC 8.4, except for the sources, and
depending on ghc-8.4 as ghc-bootstrap, since GHC 8.6
expects at least version 8.2.

* gnu/packages/haskell.scm (ghc-8.6): New field.
---
 gnu/packages/haskell.scm | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
index 09618738b6..a8657f0b97 100644
--- a/gnu/packages/haskell.scm
+++ b/gnu/packages/haskell.scm
@@ -572,6 +572,33 @@ interactive environment for the functional language Haskell.")
                                 (file-pattern ".*\\.conf\\.d$")
                                 (file-type 'directory))))))
 
+(define-public ghc-8.6
+  (package (inherit ghc-8.4)
+    (name "ghc")
+    (version "8.6.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://www.haskell.org/ghc/dist/"
+                           version "/" name "-" version "-src.tar.xz"))
+       (sha256
+        (base32 "0qg3zsmbk4rkwkc3jpas3zs74qaxmw4sp4v1mhsbj0a0dzls2jjd"))))
+    (native-inputs
+     `(("perl" ,perl)
+       ("python" ,python)               ; for tests
+       ("ghostscript" ,ghostscript)     ; for tests
+       ;; GHC 8.6.5 must be built with GHC >= 8.2.
+       ("ghc-bootstrap" ,ghc-8.4)
+       ("ghc-testsuite"
+        ,(origin
+           (method url-fetch)
+           (uri (string-append
+                 "https://www.haskell.org/ghc/dist/"
+                 version "/" name "-" version "-testsuite.tar.xz"))
+           (sha256
+            (base32
+             "0pw9r91g2np3i806g2f4f8z4jfdd7mx226cmdizk4swa7av1qf91"))))))))
+
 (define-public ghc ghc-8.4)
 
 (define-public ghc-hostname
-- 
2.20.1 (Apple Git-117)