diff --git a/ncurses/trace/varargs.c b/ncurses/trace/varargs.c
new file mode 100644
index 0000000..f4ee467
--- /dev/null
+++ b/ncurses/trace/varargs.c
@@ -0,0 +1,184 @@
+/****************************************************************************
+ * Copyright (c) 2001-2007,2008 Free Software Foundation, Inc.              *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *  Author: Thomas E. Dickey 2001                                           *
+ ****************************************************************************/
+
+#include <curses.priv.h>
+
+#include <ctype.h>
+
+MODULE_ID("$Id: varargs.c,v 1.7 2008/08/03 15:42:49 tom Exp $")
+
+#ifdef TRACE
+
+#define MAX_PARMS 10
+
+typedef enum {
+    atUnknown = 0, atInteger, atFloat, atPoint, atString
+} ARGTYPE;
+
+#define VA_INT(type) ival = va_arg(ap, type)
+#define VA_FLT(type) fval = va_arg(ap, type)
+#define VA_PTR(type) pval = (char *)va_arg(ap, type)
+#define VA_STR(type) sval = va_arg(ap, type)
+
+#define MyBuffer _nc_globals.tracearg_buf
+#define MyLength _nc_globals.tracearg_used
+
+/*
+ * Returns a string that represents the parameter list of a printf-style call.
+ */
+NCURSES_EXPORT(char *)
+_nc_varargs(const char *fmt, va_list ap)
+{
+    static char dummy[] = "";
+
+    char buffer[BUFSIZ];
+    const char *param;
+    int n;
+
+    if (fmt == 0 || *fmt == '\0')
+	return dummy;
+    if (MyLength == 0)
+	MyBuffer = typeMalloc(char, MyLength = BUFSIZ);
+    if (MyBuffer == 0)
+	return dummy;
+    *MyBuffer = '\0';
+
+    while (*fmt != '\0') {
+	if (*fmt == '%') {
+	    char *pval = 0;	/* avoid const-cast */
+	    const char *sval = "";
+	    double fval = 0.0;
+	    int done = FALSE;
+	    int ival = 0;
+	    int type = 0;
+	    ARGTYPE parm[MAX_PARMS];
+	    int parms = 0;
+	    ARGTYPE used = atUnknown;
+
+	    while (*++fmt != '\0' && !done) {
+
+		if (*fmt == '*') {
+		    VA_INT(int);
+		    if (parms < MAX_PARMS)
+			parm[parms++] = atInteger;
+		} else if (isalpha(UChar(*fmt))) {
+		    done = TRUE;
+		    switch (*fmt) {
+		    case 'Z':	/* FALLTHRU */
+		    case 'h':	/* FALLTHRU */
+		    case 'l':	/* FALLTHRU */
+			done = FALSE;
+			type = *fmt;
+			break;
+		    case 'i':	/* FALLTHRU */
+		    case 'd':	/* FALLTHRU */
+		    case 'u':	/* FALLTHRU */
+		    case 'x':	/* FALLTHRU */
+		    case 'X':	/* FALLTHRU */
+			if (type == 'l')
+			    VA_INT(long);
+			else if (type == 'Z')
+			    VA_INT(size_t);
+			else
+			    VA_INT(int);
+			used = atInteger;
+			break;
+		    case 'f':	/* FALLTHRU */
+		    case 'e':	/* FALLTHRU */
+		    case 'E':	/* FALLTHRU */
+		    case 'g':	/* FALLTHRU */
+		    case 'G':	/* FALLTHRU */
+			VA_FLT(double);
+			used = atFloat;
+			break;
+		    case 'c':
+			VA_INT(int);
+			used = atInteger;
+			break;
+		    case 's':
+			VA_STR(const char *);
+			used = atString;
+			break;
+		    case 'p':
+			VA_PTR(void *);
+			used = atPoint;
+			break;
+		    case 'n':
+			VA_PTR(int *);
+			used = atPoint;
+			break;
+		    default:
+			break;
+		    }
+		} else if (*fmt == '%') {
+		    done = TRUE;
+		}
+		if (used != atUnknown && parms < MAX_PARMS) {
+		    parm[parms++] = used;
+		    for (n = 0; n < parms; ++n) {
+			used = parm[n];
+			param = buffer;
+			switch (used) {
+			case atInteger:
+			    sprintf(buffer, "%d", ival);
+			    break;
+			case atFloat:
+			    sprintf(buffer, "%f", fval);
+			    break;
+			case atPoint:
+			    sprintf(buffer, "%p", pval);
+			    break;
+			case atString:
+			    param = _nc_visbuf2(1, sval);
+			    break;
+			case atUnknown:
+			default:
+			    strcpy(buffer, "?");
+			    break;
+			}
+			MyLength += strlen(param) + 2;
+			MyBuffer = typeRealloc(char, MyLength, MyBuffer);
+			sprintf(MyBuffer + strlen(MyBuffer), ", %s", param);
+		    }
+		}
+		used = atUnknown;
+	    }
+	} else {
+	    fmt++;
+	}
+    }
+
+    return (MyBuffer);
+}
+#else
+EMPTY_MODULE(_nc_varargs)
+#endif