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-rw-r--r--sys/sys/stdint.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/sys/stdint.h b/sys/sys/stdint.h
index ec3698b..e3d696b 100644
--- a/sys/sys/stdint.h
+++ b/sys/sys/stdint.h
@@ -66,4 +66,11 @@ typedef __uint_fast64_t uint_fast64_t;
#define WCHAR_MIN __WCHAR_MIN
#define WCHAR_MAX __WCHAR_MAX
+#if __EXT1_VISIBLE
+/* ISO/IEC 9899:2011 K.3.4.4 */
+#ifndef RSIZE_MAX
+#define RSIZE_MAX (SIZE_MAX >> 1)
+#endif
+#endif /* __EXT1_VISIBLE */
+
#endif /* !_SYS_STDINT_H_ */
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