[bug#34466] [PATCH] gnu: Add coq-equations.

[Dan Frumin <dfrumin@cs.ru.nl>]

---
 gnu/packages/coq.scm | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/gnu/packages/coq.scm b/gnu/packages/coq.scm
index fa02f85cd..494c3404b 100644
--- a/gnu/packages/coq.scm
+++ b/gnu/packages/coq.scm
@@ -500,3 +500,43 @@ work on a decision procedure for the equational theory of an extension of the
 sigma-calculus by Abadi et al.  The library is completely written in Coq and
 uses Ltac to synthesize the substitution operation.")
       (license license:bsd-3))))
+
+(define-public coq-equations
+  (package
+    (name "coq-equations")
+    (synopsis "Equations - a function definition plugin")
+    (version "1.2-beta")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "https://github.com/mattam82/Coq-Equations/archive/v"
+                    version "-8.8.tar.gz"))
+              (file-name (string-append name "-v" version "8.8.tar.gz"))
+              (sha256
+               (base32 "1j7yarhddk2c2l4b6h8g5n0xz5vfy1bqmgh832g01di5gjwshy3f"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("findlib" ,ocaml)
+       ("coq"     ,coq)
+       ("camlp5"  ,camlp5)))
+    (arguments
+     `(#:test-target "test-suite"
+       #:phases
+       (modify-phases %standard-phases
+         (replace 'configure
+           (lambda* (#:key outputs #:allow-other-keys)
+             (invoke "coq_makefile" "-f" "_CoqProject" "-o" "Makefile")))
+         (replace 'install
+           (lambda* (#:key outputs #:allow-other-keys)
+             (setenv "COQLIB" (string-append (assoc-ref outputs "out") "/lib/coq/"))
+             (invoke "make"
+                     (string-append "COQLIB=" (assoc-ref outputs "out")
+                                    "/lib/coq/")
+                     "install"))))))
+    (description "Equations provides a notation for writing programs
+by dependent pattern-matching and (well-founded) recursion in Coq. It
+compiles everything down to eliminators for inductive types, equality
+and accessibility, providing a definitional extension to the Coq
+kernel.")
+    (home-page "https://mattam82.github.io/Coq-Equations/")
+    (license license:lgpl2.1)))
-- 
2.17.1