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-rw-r--r--src/OS/os.h-Darwin6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/OS/os.h-Darwin b/src/OS/os.h-Darwin
index b597f9da3..d0a1a092f 100644
--- a/src/OS/os.h-Darwin
+++ b/src/OS/os.h-Darwin
@@ -53,4 +53,10 @@ in "man 2 getgroups". */
#define _DARWIN_UNLIMITED_GETGROUPS
#define EXIM_GROUPLIST_SIZE 64
+/* TCP_FASTOPEN support. For the moment, claim there is none
+(the probe fails; unsure why).
+Sometime in the future need to investigate connectex(). */
+
+#define EXIM_TFO_PROBE
+
/* End */