ARC: MWDT: explicitly forbid to use NEWLIB / NATIVE_APPLICATION

ARC MWDT doesn't support building Zephyr as an native
application (CONFIG_NATIVE_APPLICATION).
ARC MWDT doesn't support building with CONFIG_NEWLIB_LIBC
as it doesn't have newlib.

Let's explicitly forbid to use these Kconfig options for the
MWDT toolchain.

Signed-off-by: Eugeniy Paltsev <[email protected]>
Signed-off-by: Evgeniy Paltsev <[email protected]>

Author: evgeniy-paltsev

include/toolchain/mwdt.h

@@ -71,6 +71,14 @@
 #endif
 #endif /* _SSIZE_T_DEFINED */
 
+#ifdef CONFIG_NEWLIB_LIBC
+  #error "ARC MWDT doesn't support building with CONFIG_NEWLIB_LIBC as it doesn't have newlib"
+#endif /* CONFIG_NEWLIB_LIBC */
+
+#ifdef CONFIG_NATIVE_APPLICATION
+  #error "ARC MWDT doesn't support building Zephyr as an native application"
+#endif /* CONFIG_NATIVE_APPLICATION */
+
 
 #define __no_optimization __attribute__((optnone))