Add AT_RECURSIVE from Linux 5.2 to fcntl.h.

This patch adds the AT_RECURSIVE constant from Linux 5.2 to glibc's
fcntl.h.  (Existing practice in glibc is that the AT_* constants go
directly in io/fcntl.h rather than somewhere OS-specific.)

Tested for x86_64.

	* io/fcntl.h [__USE_GNU] (AT_RECURSIVE): New macro.

1 files changed, 1 insertions, 0 deletions

diff --git a/io/fcntl.h b/io/fcntl.h
index 7af8dfb..1043d27 100644
--- a/io/fcntl.h
+++ b/io/fcntl.h
@@ -161,6 +161,7 @@ typedef __pid_t pid_t;
 #  define AT_STATX_SYNC_AS_STAT	0x0000
 #  define AT_STATX_FORCE_SYNC	0x2000
 #  define AT_STATX_DONT_SYNC	0x4000
+#  define AT_RECURSIVE		0x8000	/* Apply to the entire subtree.  */
 # endif
 # define AT_EACCESS		0x200	/* Test access permitted for
 					   effective IDs, not real IDs.  */