feature/android 1bf8fd61c5c: Update Android port

[Po Lu]

branch: feature/android
commit 1bf8fd61c5c4781a4f00ea4a4465915c04dcb659
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Update Android port
    
    * src/fileio.c (Fcopy_file): On Android, ignore ENOSYS and
    ENOTSUP when restoring file times, as the system call used is
    supported by many kernels.
---
 src/fileio.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/fileio.c b/src/fileio.c
index 88582704d7e..99f710ccbf0 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -2495,7 +2495,17 @@ permissions.  */)
       struct timespec ts[2];
       ts[0] = get_stat_atime (&st);
       ts[1] = get_stat_mtime (&st);
-      if (futimens (ofd, ts) != 0)
+      if (futimens (ofd, ts) != 0
+         /* Various versions of the Android C library are missing
+            futimens, which leads a gnulib fallback to be installed
+            that uses fdutimens instead.  However, fdutimens is not
+            supported on many Android kernels, so just silently fail
+            if errno is ENOTSUP or ENOSYS.  */
+#if defined HAVE_ANDROID && !defined ANDROID_STUBIFY
+         && errno != ENOTSUP
+         && errno != ENOSYS
+#endif
+         )
        xsignal2 (Qfile_date_error,
                  build_string ("Cannot set file date"), newname);
     }