gnu: Add cl-ewkb.

* gnu/packages/lisp-xyz.scm (sbcl-cl-ewkb, cl-ewkb, ecl-cl-ewkb): New
  variables.

Change-Id: Iceb146ccee94b82703af706b059b3c0b35f29d86
Signed-off-by: Guillaume Le Vaillant <glv@posteo.net>

gnu/packages/lisp-xyz.scm

@@ -5272,6 +5272,37 @@ (define-public cl-environments
 (define-public ecl-cl-environments
   (sbcl-package->ecl-package sbcl-cl-environments))
 
+(define-public sbcl-cl-ewkb
+  (let ((commit "e2c7976cdc2074d63038ecd7179025ccb8d8f0b7")
+        (revision "0"))
+    (package
+      (name "sbcl-cl-ewkb")
+      (version (git-version "0.2" revision commit))
+      (source
+       (origin
+         (method git-fetch)
+         (uri (git-reference
+               (url "https://github.com/filonenko-mikhail/cl-ewkb")
+               (commit commit)))
+         (file-name (git-file-name "cl-ewkb" version))
+         (sha256
+          (base32 "1n1zm4i11638vh1a4m71690p4lpikkk0rp42j2yfvs5d9wi67cr1"))))
+      (build-system asdf-build-system/sbcl)
+      (inputs (list sbcl-ieee-floats sbcl-flexi-streams))
+      (home-page "https://github.com/filonenko-mikhail/cl-ewkb")
+      (synopsis "Common Lisp PostGIS EWKB library")
+      (description "This package is a geospatial library, based on cl-wkb,
+that implements the OGC Well-Known Binary geographic geometry data model with
+PostGIS 3d, 4d extensions, and provides WKB and EWKB encoding and decoding
+functionality.")
+      (license (list license:expat)))))
+
+(define-public cl-ewkb
+  (sbcl-package->cl-source-package sbcl-cl-ewkb))
+
+(define-public ecl-cl-ewkb
+  (sbcl-package->ecl-package sbcl-cl-ewkb))
+
 (define-public sbcl-cl-fad
   ;; No release since 2019
   (let ((commit "3f4d32d3aa1093966046d001411a852eb8f4b535")