From d7fe431f96a10b837e0b7f7fb9bc653fd14a797f Mon Sep 17 00:00:00 2001
From: "E.Smith" <31170571+azlm8t@users.noreply.github.com>
Date: Mon, 17 Sep 2018 13:10:27 +0100
Subject: [PATCH] FreeBSD: Check for fdatasync system call since it is
 supported on FreeBSD 11.1 and later.

---
 configure   | 6 ++++++
 src/muxer.c | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/configure b/configure
index b183d02b3..9f34ac36f 100755
--- a/configure
+++ b/configure
@@ -173,6 +173,12 @@ int test(int argc, char **argv) {
   return 0;
 }'
 
+check_cc_snippet fdatasync '#include <unistd.h>
+int test(int argc, char **argv) {
+  fdatasync(0);
+  return 0;
+}'
+
 check_cc_snippet getloadavg '#include <stdlib.h>
 void test() { getloadavg(NULL,0); }'
 
diff --git a/src/muxer.c b/src/muxer.c
index 3e1987597..1da9dead8 100644
--- a/src/muxer.c
+++ b/src/muxer.c
@@ -29,11 +29,14 @@
 #include "muxer/muxer_libav.h"
 #endif
 
+/* Newer platforms such as FreeBSD 11.1 support fdatasync so only alias on older systems */
+#ifndef CONFIG_FDATASYNC
 #if defined(PLATFORM_DARWIN)
 #define fdatasync(fd)       fcntl(fd, F_FULLFSYNC)
 #elif defined(PLATFORM_FREEBSD)
 #define fdatasync(fd)       fsync(fd)
 #endif
+#endif
 
 /**
  * Mime type for containers containing only audio
-- 
2.47.2