posix: sys/time.h: Add workaround for outdated newlib used by Xtensa

Unfortunately, Zephyr SDK 0.10.0 ships with outdate Newlib 2.0.0
(from 2015 or earlier) which lacks sys/_timeval.h header, requiring
ugly workaround of defining struct timeval inline (the whole idea
was to standardize on sys/_timeval.h header for different libc's).

Signed-off-by: Paul Sokolovsky <[email protected]>

Author: pfalcon

include/posix/sys/time.h

@@ -7,7 +7,23 @@
 #ifndef ZEPHYR_INCLUDE_POSIX_SYS_TIME_H_
 #define ZEPHYR_INCLUDE_POSIX_SYS_TIME_H_
 
+#ifdef CONFIG_NEWLIB_LIBC
+/* Kludge to support outdated newlib version as used in SDK 0.10 for Xtensa */
+#include <newlib.h>
+
+#ifdef __NEWLIB__
+#include <sys/_timeval.h>
+#else
+#include <sys/types.h>
+struct timeval {
+	time_t tv_sec;
+	suseconds_t tv_usec;
+};
+#endif
+
+#else
 #include <sys/_timeval.h>
+#endif /* CONFIG_NEWLIB_LIBC */
 
 #ifdef __cplusplus
 extern "C" {