new file mode 100644
--- /dev/null
+++ b/packages/language/c/libc/current/src/string/strncat.cxx
@@ -0,0 +1,129 @@
+//===========================================================================
+//
+//      strncat.cxx
+//
+//      ANSI standard strncat() routine
+//
+//===========================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// Software distributed under the License is distributed on an "AS IS"
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the
+// License for the specific language governing rights and limitations under
+// the License.
+// 
+// The Original Code is eCos - Embedded Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998 Cygnus Solutions.  All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//===========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):   jlarmour
+// Contributors:  jlarmour@cygnus.co.uk
+// Date:        1998-02-13
+// Purpose:     
+// Description: 
+// Usage:       
+//
+//####DESCRIPTIONEND####
+//
+//===========================================================================
+
+// CONFIGURATION
+
+#include <pkgconf/libc.h>   // Configuration header
+
+// Include the C library?
+#ifdef CYGPKG_LIBC     
+
+// INCLUDES
+
+#include <cyg/infra/cyg_type.h>    // Common type definitions
+#include <cyg/infra/cyg_trac.h>    // Tracing support
+#include <cyg/infra/cyg_ass.h>     // Assertion support
+#include <string.h>                // Header for this file
+#include <stddef.h>         // Compiler definitions such as size_t, NULL etc.
+#include "clibincl/stringsupp.hxx" // Useful string function support and
+                                   // prototypes
+
+// EXPORTED SYMBOLS
+
+externC char *
+strncat( char *s1, const char *s2, size_t n ) \
+    CYGPRI_LIBC_WEAK_ALIAS("_strncat");
+
+// FUNCTIONS
+
+char *
+_strncat( char *s1, const char *s2, size_t n)
+{
+    CYG_REPORT_FUNCNAMETYPE( "_strncat", "returning %08x" );
+    CYG_REPORT_FUNCARG3( "s1=%08x, s2=%08x, n=%d", s1, s2, n );
+
+    CYG_CHECK_DATA_PTR( s1, "s1 is not a valid pointer!" );
+    CYG_CHECK_DATA_PTR( s2, "s2 is not a valid pointer!" );
+
+#if defined(CYGIMP_LIBC_STRING_PREFER_SMALL_TO_FAST) || defined(__OPTIMIZE_SIZE__)
+    char *s = s1;
+    
+    while (*s1)
+        s1++;
+    while (n-- != 0 && (*s1++ = *s2++))
+    {
+        if (n == 0)
+            *s1 = '\0';
+    }
+    
+    CYG_REPORT_RETVAL( s );
+
+    return s;
+#else
+    char *s = s1;
+    
+    // Skip over the data in s1 as quickly as possible.
+    if (!CYG_LIBC_STR_UNALIGNED (s1))
+    {
+        CYG_WORD *aligned_s1 = (CYG_WORD *)s1;
+        while (!CYG_LIBC_STR_DETECTNULL (*aligned_s1))
+            aligned_s1++;
+        
+        s1 = (char *)aligned_s1;
+    }
+    
+    while (*s1)
+        s1++;
+    
+    // s1 now points to the its trailing null character, now copy
+    // up to N bytes from S2 into S1 stopping if a NULL is encountered
+    // in S2.
+    // 
+    // It is not safe to use strncpy here since it copies EXACTLY N
+    // characters, NULL padding if necessary.
+
+    while (n-- != 0 && (*s1++ = *s2++))
+    {
+        if (n == 0)
+            *s1 = '\0';
+    }
+    
+    CYG_REPORT_RETVAL( s );
+
+    return s;
+#endif // not defined(CYGIMP_LIBC_STRING_PREFER_SMALL_TO_FAST) ||
+       //     defined(__OPTIMIZE_SIZE__)
+} // _strncat()
+
+#endif // ifdef CYGPKG_LIBC     
+
+// EOF strncat.cxx