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-rw-r--r--newlib/libc/include/sys/types.h20
1 files changed, 16 insertions, 4 deletions
diff --git a/newlib/libc/include/sys/types.h b/newlib/libc/include/sys/types.h
index c0b579623..496c2ae0c 100644
--- a/newlib/libc/include/sys/types.h
+++ b/newlib/libc/include/sys/types.h
@@ -168,11 +168,23 @@ typedef int32_t register_t;
*/
#ifndef __CYGWIN__ /* which defines these types in it's own types.h. */
-typedef _off_t off_t;
-typedef __dev_t dev_t;
-typedef __uid_t uid_t;
-typedef __gid_t gid_t;
+#ifndef _OFF_T_DECLARED
+typedef __off_t off_t; /* file offset */
+#define _OFF_T_DECLARED
#endif
+#ifndef _DEV_T_DECLARED
+typedef __dev_t dev_t; /* device number or struct cdev */
+#define _DEV_T_DECLARED
+#endif
+#ifndef _UID_T_DECLARED
+typedef __uid_t uid_t; /* user id */
+#define _UID_T_DECLARED
+#endif
+#ifndef _GID_T_DECLARED
+typedef __gid_t gid_t; /* group id */
+#define _GID_T_DECLARED
+#endif
+#endif /* !__CYGWIN__ */
#ifndef _PID_T_DECLARED
typedef __pid_t pid_t; /* process id */