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-rw-r--r--newlib/libc/include/sys/features.h6
-rw-r--r--newlib/libc/include/wchar.h3
2 files changed, 9 insertions, 0 deletions
diff --git a/newlib/libc/include/sys/features.h b/newlib/libc/include/sys/features.h
index 2f862687c..b2e56daae 100644
--- a/newlib/libc/include/sys/features.h
+++ b/newlib/libc/include/sys/features.h
@@ -178,6 +178,12 @@ extern "C" {
/* #define _XOPEN_UNIX -1 */
#endif /* !__STRICT_ANSI__ || __cplusplus || __STDC_VERSION__ >= 199901L */
+
+/* The value corresponds to UNICODE version 4.0, which is the version
+ supported by XP. Newlib supports 5.2 (2011) but so far Cygwin needs
+ the MS conversions for double-byte charsets. */
+#define __STDC_ISO_10646__ 200305L
+
#endif /* __CYGWIN__ */
/* Per the permission given in POSIX.1-2008 section 2.2.1, define
diff --git a/newlib/libc/include/wchar.h b/newlib/libc/include/wchar.h
index 234c71e00..3cb12e25f 100644
--- a/newlib/libc/include/wchar.h
+++ b/newlib/libc/include/wchar.h
@@ -16,6 +16,9 @@
/* For _mbstate_t definition. */
#include <sys/_types.h>
+/* For __STDC_ISO_10646__ */
+#include <sys/features.h>
+
#ifndef NULL
#define NULL 0
#endif