bug#27946: 26.0.50; Commit 1f9f514e7c2ba41b0954d0141f99652f6a53a107 breaks the build on Ubuntu 14.04

[Tino Calancha <tino.calancha@gmail.com>]

Philipp Stephani <p.stephani2@gmail.com> writes:

> It appears that commit 1f9f514e7c2ba41b0954d0141f99652f6a53a107 breaks
> the build on Ubuntu 14.04:
>
> sysdep.c: In function ‘renameat_noreplace’:
> sysdep.c:2695:58: error: ‘RENAME_NOREPLACE’ undeclared (first use in this function)
>    return syscall (SYS_renameat2, srcfd, src, dstfd, dst, RENAME_NOREPLACE);
>
> Probably the #ifdef there should also include RENAME_NOREPLACE.
I confirm i can build in Ubuntu-14.04 with this patch:

diff --git a/src/sysdep.c b/src/sysdep.c
index 22446b25d1..9eb733221e 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -2691,7 +2691,7 @@ set_file_times (int fd, const char *filename,
 int
 renameat_noreplace (int srcfd, char const *src, int dstfd, char const *dst)
 {
-#ifdef SYS_renameat2
+#if defined SYS_renameat2 && defined RENAME_NOREPLACE
   return syscall (SYS_renameat2, srcfd, src, dstfd, dst, RENAME_NOREPLACE);
 #else
   errno = ENOSYS;