soc: esp32: add _gettimeofday_r workaround

Add reentrant _gettimeofday_ call so that build
won't fail. This is only a workaround for now.

Signed-off-by: Sylvio Alves <[email protected]>

Author: sylvioalves

soc/xtensa/esp32/CMakeLists.txt

@@ -6,6 +6,8 @@ zephyr_sources(
   loader.c
   )
 
+zephyr_library_sources_ifdef(CONFIG_NEWLIB_LIBC newlib_fix.c)
+
 zephyr_library_sources_ifdef(CONFIG_GDBSTUB gdbstub.c)
 
 # get code-partition slot0 address

soc/xtensa/esp32/newlib_fix.c

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2019, Intel Corporation.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <toolchain.h>
+#include <stdio.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#include <reent.h>
+
+int __weak _gettimeofday_r(struct _reent *r, struct timeval *__tp, void *__tzp)
+{
+	ARG_UNUSED(r);
+	ARG_UNUSED(__tp);
+	ARG_UNUSED(__tzp);
+
+	return -1;
+}