X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/9c19b270ead379003ece51fb49b83e7ea8b2d25e..da88acaeb7d76e5312c8ea799951470eaa5eca0f:/src/OS/os.h-Linux

diff --git a/src/OS/os.h-Linux b/src/OS/os.h-Linux
index 05c153e2c..cc1cef99b 100644
--- a/src/OS/os.h-Linux
+++ b/src/OS/os.h-Linux
@@ -65,5 +65,15 @@ then change the 0 to 1 in the next block. */
 # define LLONG_MAX LONG_LONG_MAX
 #endif
 
+#if _POSIX_C_SOURCE >= 200809L || _ATFILE_SOUCE
+# define EXIM_HAVE_OPENAT
+#endif
+
+#include <netinet/tcp.h>	/* for TCP_FASTOPEN */
+#include <sys/socket.h>		/* for MSG_FASTOPEN */
+#if defined(TCP_FASTOPEN) && !defined(MSG_FASTOPEN)
+# define MSG_FASTOPEN 0x20000000
+#endif
+
 
 /* End */