Index: include/stdlib.h
===================================================================
RCS file: /cvsroot/src/include/stdlib.h,v
retrieving revision 1.121
diff -u -r1.121 stdlib.h
--- include/stdlib.h	5 Jan 2019 09:16:46 -0000	1.121
+++ include/stdlib.h	12 Sep 2019 23:40:14 -0000
@@ -129,6 +129,10 @@
 #endif
 int	 system(const char *);
 
+#if defined(_NETBSD_SOURCE)
+void	__suppress_leak(void *);
+#endif
+
 /* These are currently just stubs. */
 int	 mblen(const char *, size_t);
 size_t	 mbstowcs(wchar_t * __restrict, const char * __restrict, size_t);
Index: lib/libc/stdlib/Makefile.inc
===================================================================
RCS file: /cvsroot/src/lib/libc/stdlib/Makefile.inc,v
retrieving revision 1.95
diff -u -r1.95 Makefile.inc
--- lib/libc/stdlib/Makefile.inc	4 Mar 2019 17:30:33 -0000	1.95
+++ lib/libc/stdlib/Makefile.inc	12 Sep 2019 23:40:15 -0000
@@ -4,7 +4,8 @@
 # stdlib sources
 .PATH: ${ARCHDIR}/stdlib ${.CURDIR}/stdlib
 
-SRCS+=	_env.c _rand48.c \
+SRCS+=	__suppress_leak.c \
+	_env.c _rand48.c \
 	a64l.c abort.c atexit.c atof.c atoi.c atol.c atoll.c \
 	bsearch.c cxa_thread_atexit.c drand48.c exit.c \
 	getenv.c getopt.c getopt_long.c getsubopt.c \
Index: lib/libc/stdlib/__suppress_leak.c
===================================================================
RCS file: lib/libc/stdlib/__suppress_leak.c
diff -N lib/libc/stdlib/__suppress_leak.c
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ lib/libc/stdlib/__suppress_leak.c	12 Sep 2019 23:40:15 -0000
@@ -0,0 +1,49 @@
+/*	$NetBSD$	*/
+
+/*-
+ * Copyright (c) 2019 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#include <sys/cdefs.h>
+#if defined(LIBC_SCCS) && !defined(lint)
+__RCSID("$NetBSD$");
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * Stubs for thread operations, for use when leak detectors are not used by
+ * the application.
+ */
+
+void __libc_suppress_leak(void *p);
+
+__weak_alias(__suppress_leak, __libc_suppress_leak)
+
+void
+__libc_suppress_leak(void *p)
+{
+
+	__USE(p);
+}