From b488a309f514fecf7cda9bb5ccb53803a5034210 Mon Sep 17 00:00:00 2001
From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Mon, 1 Jun 2020 15:35:03 +0100
Subject: [Minor] Add recvmmsg detection

---
 CMakeLists.txt | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'CMakeLists.txt')

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e60b9cf84..0af33f1fe 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -505,6 +505,11 @@ IF(CMAKE_SYSTEM_NAME STREQUAL "Linux")
 	# on a build system. On the other hand, we know that linux has stupid
 	# but compatible shmem support, so we assume this macro as true
 	SET(HAVE_SANE_SHMEM 1)
+	CHECK_C_SOURCE_COMPILES ("#define _GNU_SOURCE
+						  #include <sys/socket.h>
+						  int main (int argc, char **argv) {
+							return ((int*)(&recvmmsg))[argc];
+						  }" HAVE_RECVMMSG)
 ELSE()
 	CHECK_C_SOURCE_RUNS("
 	#include <sys/mman.h>
-- 
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