From e7f5f855ab0e802a46ac26fd05bc0e417c76ab5d Mon Sep 17 00:00:00 2001
From: Jacek Sieka <jacek@status.im>
Date: Tue, 2 Feb 2021 15:12:12 +0100
Subject: [PATCH] use constant for ip kind (#151)

IPV6_MULTICAST_HOPS already declared in posix.nim while IP_MULTICAST_TTL
has a value that will stay constant on linux/x86_64 - better codegen and
nlvm compat like this.
---
 chronos/transports/datagram.nim | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/chronos/transports/datagram.nim b/chronos/transports/datagram.nim
index 4333123..f3f2eb4 100644
--- a/chronos/transports/datagram.nim
+++ b/chronos/transports/datagram.nim
@@ -15,10 +15,11 @@ when defined(windows):
   import winlean
 else:
   import posix
-  var IP_MULTICAST_TTL* {.importc: "IP_MULTICAST_TTL",
-                          header: "<netinet/in.h>".}: cint
-  var IPV6_MULTICAST_HOPS* {.importc: "IPV6_MULTICAST_HOPS",
-                             header: "<netinet/in.h>".}: cint
+  when (defined(linux) and not defined(android)) and defined(amd64):
+    const IP_MULTICAST_TTL: cint = 33
+  else:
+    var IP_MULTICAST_TTL* {.importc: "IP_MULTICAST_TTL",
+                            header: "<netinet/in.h>".}: cint
 
 type
   VectorKind = enum