1 files changed, 33 insertions, 0 deletions
diff --git a/lib/free.c b/lib/free.c
new file mode 100644
index 0000000..2f689a7
--- /dev/null
+++ b/lib/free.c
@@ -0,0 +1,33 @@
+/* Make free() preserve errno.
+
+   Copyright (C) 2003, 2006, 2009-2020 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Paul Eggert */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include <errno.h>
+
+void
+rpl_free (void *p)
+#undef free
+{
+  int err = errno;
+  free (p);
+  errno = err;
+}