Description: <short summary of the patch>
 TODO: Put a short summary on the line above and replace this paragraph
 with a longer explanation of this change. Complete the meta-information
 with other relevant fields (see below for details). To make it easier, the
 information below has been extracted from the changelog. Adjust it or drop
 it.
 .
 groops (0+git20230516+ds-1) unstable; urgency=medium
 .
   * Initial release. (Closes: #1001622)
Author: Gürkan Myczko <tar@debian.org>
Bug-Debian: https://bugs.debian.org/1001622

---
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Origin: (upstream|backport|vendor|other), (<patch-url>|commit:<commit-id>)
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Last-Update: 2023-06-03

--- /dev/null
+++ groops-0+git20230516+ds/source/external/hwm/hwm.h
@@ -0,0 +1,27 @@
+/***********************************************/
+/**
+* @file hwm.h
+*
+* @brief Fortran Wrapper.
+*
+* @author Sandro Krauss
+* @date 2019-03-21
+*
+*/
+/***********************************************/
+
+#ifndef __GROOPS_HWM__
+#define __GROOPS_HWM__
+
+#include "external/fortran.h"
+
+#define hwm FORTRANCALL(hwm14, HWM14)
+
+extern "C" void hwm(const F77Int &yd, const F77Float &sec, const F77Float &alt,
+                    const F77Float &lat, const F77Float &lon, const F77Float &/*stl*/,
+                    const F77Float &/*f107a*/, const F77Float &/*f107*/,
+                    const F77Float ap[], F77Float outf[]);
+
+/***********************************************/
+
+#endif
