--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/extern/libcompat/src/setprogname.c	Wed Feb 03 12:37:46 2021 +0100
@@ -0,0 +1,29 @@
+/*
+ * setprogname.c -- setprogname implementation
+ *
+ * Copyright (c) 2020-2021 David Demelier <markand@malikania.fr>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <stdio.h>
+
+static char libcompat_progname_buf[64] = "";
+
+const char *libcompat_progname = libcompat_progname_buf;
+
+void
+setprogname(const char *name)
+{
+	snprintf(libcompat_progname_buf, sizeof (libcompat_progname_buf), "%s", name);
+}