configure: use `foo` instead of $(foo)

Seems to work everywhere, whereas $(foo) does not work on
some variants of FreeBSD.

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

diff --git a/configure b/configure
index caaf30e05608adfe1e48a2b872ed816ac36a175c..8125fc3ccfb685ae0f8149b191a079121adfbc81 100755 (executable)
--- a/configure
+++ b/configure
@@ -349,7 +349,7 @@ int main(void)
 }
 EOF
 if compile_prog "" "" "wordsize"; then
-  wordsize=$($TMPE)
+  wordsize=`$TMPE`
 fi
 echo "Wordsize                      $wordsize"