gnu: Add fortran-dftd4.

* gnu/packages/fortran-xyz.scm (fortran-dftd4): New variable.

Change-Id: I22adf29342a13d9c6d707f2e7ed1906c664aaa55
Signed-off-by: Sharlatan Hellseher <sharlatanus@gmail.com>

gnu/packages/fortran-xyz.scm

@@ -33,6 +33,41 @@
 ;;;
 ;;; Code:
 
+(define-public fortran-dftd4
+  (package
+    (name "fortran-dftd4")
+    (version "3.7.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+              (url "https://github.com/dftd4/dftd4")
+              (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0alsvzgdkmw80wfpsds31pzgcr962xhq9q7yvc26jxgrn444yb3n"))))
+    (build-system meson-build-system)
+    (arguments
+     (list
+      #:configure-flags
+      #~(list (string-append "-Dfortran_link_args=-Wl,-rpath="
+                             #$output "/lib"))))
+    (native-inputs
+     (list gfortran
+           pkg-config
+           python-minimal))
+    (inputs
+     (list fortran-mctc-lib
+           fortran-mstore
+           fortran-multicharge
+           lapack))
+    (home-page "https://github.com/dftd4/dftd4")
+    (synopsis "Implementation of the DFT-D4 dispersion correction")
+    (description
+     "This library provides an implementation of the DFT-D4 dispersion
+correction with both a Fortran and a C interface.")
+    (license license:lgpl3+)))
+
 (define-public fortran-mctc-lib
   (package
     (name "fortran-mctc-lib")