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-rw-r--r--include/ruby/missing.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/ruby/missing.h b/include/ruby/missing.h
index 067145a156d..5309fe94661 100644
--- a/include/ruby/missing.h
+++ b/include/ruby/missing.h
@@ -51,6 +51,11 @@ struct timezone {
};
#endif
+#if defined(HAVE___SYSCALL) && !defined(__syscall)
+/* Mac OS X has __syscall but doen't defined in headers */
+off_t __syscall(quad_t number, ...);
+#endif
+
#ifdef RUBY_EXPORT
#undef RUBY_EXTERN
#endif