[UNIKRAFT/NEWLIB PATCH] Define tzname

[Felipe Huici <felipe.huici@xxxxxxxxx>]

Currently, tzname is defined as an extern, which results in a
undefined reference linker error when attempting to use it. This patch
maps tzname to _tzanme, which *is* defined. newlib does this mapping
in OS-specific files that we don't compile in, so this is a way to
mimic that behavior.

Signed-off-by: Felipe Huici <felipe.huici@xxxxxxxxx>
---
 include/sys/time.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/sys/time.h b/include/sys/time.h
index 4a81946..07dc078 100644
--- a/include/sys/time.h
+++ b/include/sys/time.h
@@ -39,4 +39,8 @@
 
 #include <sys/reent.h>
 
+#ifndef tzname
+#define tzname _tzname
+#endif
+
 #endif /* __NEWLIB_GLUE_SYS_TIME_H__ */
-- 
2.20.1