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diff --git a/libgfortran/m4/maxloc0s.m4 b/libgfortran/m4/maxloc0s.m4
new file mode 100644
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+++ b/libgfortran/m4/maxloc0s.m4
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+`/* Implementation of the MAXLOC intrinsic
+   Copyright 2017 Free Software Foundation, Inc.
+   Contributed by Thomas Koenig
+
+This file is part of the GNU Fortran runtime library (libgfortran).
+
+Libgfortran is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public
+License as published by the Free Software Foundation; either
+version 3 of the License, or (at your option) any later version.
+
+Libgfortran is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#include "libgfortran.h"
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <limits.h>'
+
+include(iparm.m4)dnl
+include(iforeach-s.m4)dnl
+
+`#if defined (HAVE_'atype_name`) && defined (HAVE_'rtype_name`)'
+
+FOREACH_FUNCTION(
+`  const atype_name *maxval;
+   maxval = base;'
+,
+`  if (compare_fcn (base, maxval, len) > 0)
+    {
+      maxval = base;
+      for (n = 0; n < rank; n++)
+        dest[n * dstride] = count[n] + 1;
+    }')
+
+MASKED_FOREACH_FUNCTION(
+`  const atype_name *maxval;
+
+  maxval = NULL;'
+,
+`  if (*mbase && (maxval == NULL || compare_fcn (base, maxval, len) > 0))
+    {
+      maxval = base;
+      for (n = 0; n < rank; n++)
+        dest[n * dstride] = count[n] + 1;
+    }')
+
+SCALAR_FOREACH_FUNCTION(`0')
+#endif