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-rw-r--r--src/include/port/darwin.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/include/port/darwin.h b/src/include/port/darwin.h
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--- /dev/null
+++ b/src/include/port/darwin.h
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+/* src/include/port/darwin.h */
+
+#define __darwin__ 1
+
+#if HAVE_DECL_F_FULLFSYNC /* not present before macOS 10.3 */
+#define HAVE_FSYNC_WRITETHROUGH
+
+#endif