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diff --git a/dwarfdump2/strstrnocase.cc b/dwarfdump2/strstrnocase.cc
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+/*
+  Copyright (C) 2009-2011 David Anderson.  All Rights Reserved.
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms of version 2 of the GNU General Public License as
+  published by the Free Software Foundation.
+
+  This program is distributed in the hope that it would be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+  Further, this software is distributed without any warranty that it is
+  free of the rightful claim of any third person regarding infringement
+  or the like.  Any license provided herein, whether implied or
+  otherwise, applies only to this software file.  Patent licenses, if
+  any, provided herein do not apply to combinations of this program with
+  other software, or any other product whatsoever.
+
+  You should have received a copy of the GNU General Public License along
+  with this program; if not, write the Free Software Foundation, Inc., 51
+  Franklin Street - Fifth Floor, Boston MA 02110-1301, USA.
+
+  Contact information:  Silicon Graphics, Inc., 1500 Crittenden Lane,
+  Mountain View, CA 94043, or:
+
+  http://www.sgi.com
+
+  For further information regarding this notice, see:
+
+  http://oss.sgi.com/projects/GenInfo/NoticeExplan
+
+*/
+/*  The address of the Free Software Foundation is
+    Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 
+    Boston, MA 02110-1301, USA.  
+*/
+
+
+
+/*
+This tries to find the string 'contained' in the
+string 'container'.  it returns true if found, else false.
+The comparisons are independent  of case.
+
+Regrettably there is no generally accepted version that
+does this job, though GNU Linux has  strcasestr() which
+does what we need.  
+
+There is a public domain stristr().    But given that dwarfdump is GPL,
+it would seem (IANAL) that we cannot mix public domain code
+into the release.
+
+The software here is independently written and indeed trivial.
+
+The POSIX function tolower() is only properly defined on unsigned char, hence
+the ugly casts.
+
+strstrnocase.cc
+
+*/
+#include <ctype.h>
+#include <stdio.h>
+#include <globals.h>
+
+bool
+is_strstrnocase(const char * container, const char * contained)
+{
+    const unsigned char *ct = (const unsigned char *)container;
+    for( ; *ct; ++ct )
+    {
+        const unsigned char * cntnd = (const unsigned char *)contained;
+        bool innerwrong = true;
+        for(  ; *cntnd; ++cntnd,++ct) 
+        {
+            unsigned char lct = tolower(*ct);
+            unsigned char tlc = tolower(*cntnd);
+            if(lct != tlc) {
+                innerwrong=true;
+                break; /* Go to outer loop */
+            }
+            innerwrong=false;
+        }
+        if(!innerwrong) {
+            return true;
+        }
+    }
+    return false;
+}
+
+#ifdef TEST
+static void
+test(const  char *t1, const char *t2,int resexp)
+{
+    bool  res = is_strstrnocase(t1,t2);
+    if (res == resexp) {
+        return;
+    }
+    printf("Error,mismatch %s and %s.  Expected %d got %d\n",
+        t1,t2,resexp,res);
+}
+
+int main()
+{
+    test("aaaaa","a",1);
+    test("aaaaa","b",0);
+    test("abaaba","ba",1);
+    test("abaabA","Ba",1);
+    test("a","ab",0);
+    test("b","c",0);
+    test("b","",0);
+    test("","c",0);
+    test("","",0);
+    test("aaaaa","aaaaaaaa",0);
+}
+#endif