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+?RCS: $Id: d_vsnprintf.U 167 2013-05-08 17:58:00Z rmanfredi $
+?RCS: Copyright (c) 2006, Christian Biere
+?RCS: You may redistribute only under the terms of the Artistic License,
+?RCS: as specified in the README file that comes with the distribution.
+?RCS: You may reuse parts of this distribution only within the terms of
+?RCS: that same Artistic License; a copy of which may be found at the root
+?RCS: of the source tree for dist 4.0.
+?MAKE:d_vsnprintf: Trylink cat
+?MAKE: -pick add $@ %<
+?S: This variable conditionally defines the HAS_VSNPRINTF symbol, which
+?S: indicates to the C program that the vsnprintf() routine is available.
+?C: This symbol, if defined, indicates that the vsnprintf routine is
+?C: available.
+?H:#$d_vsnprintf HAS_VSNPRINTF /**/
+?LINT:set d_vsnprintf
+: see if vsnprintf exists
+$cat >try.c <<EOC
+#include <stdarg.h>
+#include <stdio.h>
+int func(char *s, ...)
+ static int ret;
+ static char buf;
+ static size_t n;
+ va_list ap;
+ (void) s;
+ ret |= vsnprintf(&buf, n, "fmt", ap);
+ return ret;
+int main(void)
+ return func("xxx", 1);
+set d_vsnprintf
+eval $trylink