configure: enable e4defrag engine regardless of MOVE_EXTENT compile test

It may exist in the running kernel, even if the defines
and structures haven't bubbled back into userspace yet.
The engine carries it's own check and structure define
for that case.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/configure b/configure
index 9cdfc4984e33cb768b4b477d94253b0be52e70a3..3558bf48e9a52752c74fd7ce8a6a20a26fd9c829 100755 (executable)
--- a/configure
+++ b/configure
@@ -585,7 +585,12 @@ int main(int argc, char **argv)
   return ioctl(0, EXT4_IOC_MOVE_EXT, &me);
 }
 EOF
-if compile_prog "" "" "ext4 move extent"; then
+if compile_prog "" "" "ext4 move extent" ; then
+  ext4_me="yes"
+elif test $targetos = "Linux" ; then
+  # On Linux, just default to it on and let it error at runtime if we really
+  # don't have it. None of my updated systems have it defined, but it does
+  # work. Takes a while to bubble back.
   ext4_me="yes"
 fi
 echo "EXT4 move extent              $ext4_me"