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diff --git a/Build/source/texk/kpathsea/c-memstr.h b/Build/source/texk/kpathsea/c-memstr.h
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+/* c-memstr.h: memcpy, strchr, etc.
+
+ Copyright 1992-2013 Karl Berry and Olaf Weber.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this library; if not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef KPATHSEA_C_MEMSTR_H
+#define KPATHSEA_C_MEMSTR_H
+
+/* <X11/Xfuncs.h> tries to declare bcopy etc., which can only conflict. */
+#define _XFUNCS_H_
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#else
+/* don't ever want both string.h and strings.h; fails on AIX. */
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+#endif
+
+/* An ANSI string.h and pre-ANSI memory.h might conflict. */
+#if !defined (STDC_HEADERS) && defined (HAVE_MEMORY_H)
+#include <memory.h>
+#endif /* not STDC_HEADERS and HAVE_MEMORY_H */
+
+/* For ancient systems that lack the system V/ANSI version of the
+ string functions we express them in terms of the BSD versions. */
+#if !defined(HAVE_STRCHR) && !defined(strchr)
+#define strchr index
+#endif
+
+#if !defined(HAVE_STRRCHR) && !defined(strrchr)
+#define strrchr rindex
+#endif
+
+#if !defined(HAVE_MEMCMP) && !defined(memcmp)
+#define memcmp(s1, s2, n) bcmp ((s1), (s2), (n))
+#endif
+
+#if !defined(HAVE_MEMCPY) && !defined(memcpy)
+#define memcpy(to, from, len) bcopy ((from), (to), (len))
+#endif
+
+#if !defined(HAVE_STRING_H)
+extern char *strtok ();
+#ifndef strstr
+extern char *strstr ();
+#endif
+#endif
+
+#endif /* not KPATHSEA_C_MEMSTR_H */