gnu: Add postgis.

* gnu/packages/geo.scm (postgis): New variable.

gnu/packages/geo.scm

@@ -45,6 +45,7 @@
   #:use-module (gnu packages image)
   #:use-module (gnu packages icu4c)
   #:use-module (gnu packages pcre)
+  #:use-module (gnu packages perl)
   #:use-module (gnu packages pkg-config)
   #:use-module (gnu packages python)
   #:use-module (gnu packages statistics)
@@ -705,3 +706,56 @@ utilities for data translation and processing.")
                (license:non-copyleft "file://alg/internal_libqhull/COPYING.txt")
                ;; frmts/mrf/libLERC
                license:asl2.0))))
+
+(define-public postgis
+  (package
+    (name "postgis")
+    (version "2.4.4")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "https://download.osgeo.org/postgis/source/postgis-"
+                                  version ".tar.gz"))
+              (sha256
+               (base32
+                "1hm8migjb53cymp4qvg1h20yqllmy9f7x0awv5450391i6syyqq6"))))
+    (build-system gnu-build-system)
+    (arguments
+     `(#:tests? #f
+       #:make-flags
+       (list (string-append "datadir=" (assoc-ref %outputs "out") "/share")
+             (string-append "docdir="(assoc-ref %outputs "out") "/share/doc")
+             (string-append "pkglibdir="(assoc-ref %outputs "out") "/lib")
+             (string-append "bindir=" (assoc-ref %outputs "out") "/bin"))
+       #:phases
+       (modify-phases %standard-phases
+         (add-before 'build 'fix-install-path
+           (lambda* (#:key outputs #:allow-other-keys)
+             (substitute* '("raster/loader/Makefile" "raster/scripts/python/Makefile")
+               (("\\$\\(DESTDIR\\)\\$\\(PGSQL_BINDIR\\)")
+                (string-append (assoc-ref outputs "out") "/bin"))))))))
+    (inputs
+     `(("gdal" ,gdal)
+       ("geos" ,geos)
+       ("libxml2" ,libxml2)
+       ("pcre" ,pcre)
+       ("postgresql" ,postgresql)
+       ("proj.4" ,proj.4)))
+    (native-inputs
+     `(("perl" ,perl)
+       ("pkg-config" ,pkg-config)))
+    (home-page "https://postgis.net")
+    (synopsis "Spatial database extender for PostgreSQL")
+    (description "PostGIS is a spatial database extender for PostgreSQL
+object-relational database.  It adds support for geographic objects allowing
+location queries to be run in SQL.")
+    (license (list
+               ;; General license
+               license:gpl2+
+               ;; loader/dbfopen, safileio.*, shapefil.h, shpopen.c
+               license:expat
+               ;; loader/getopt.*
+               license:public-domain
+               ;; doc/xsl
+               license:bsd-3 ; files only say "BSD"
+               ;; doc
+               license:cc-by-sa3.0))))