This file has invocations of undeclared functions getenv() and strchr().
This patch fixes it.
2020-06-21 Bruno Haible <br...@clisp.org>
tzset: Fix compilation warnings on mingw (regression from 2017-05-01).
* lib/tzset.c: Include <stdlib.h>, <string.h>.
diff --git a/lib/tzset.c b/lib/tzset.c
index 24c972d..e3543ba 100644
--- a/lib/tzset.c
+++ b/lib/tzset.c
@@ -22,6 +22,9 @@
/* Specification. */
#include <time.h>
+#include <stdlib.h>
+#include <string.h>
+
#include "localtime-buffer.h"
/* This is a wrapper for tzset, for systems on which tzset may clobber
