THRIFT-450. Don't use Ivy if log4j is already available

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@774132 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/configure.ac b/configure.ac
index b4c50b4..07fa2e3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -70,6 +70,12 @@
 if test "$with_java" = "yes";  then
   AX_JAVAC_AND_JAVA
   AC_PATH_PROG([ANT], [ant])
+  AX_CHECK_JAVA_CLASS(org.apache.log4j.Logger)
+  have_log4j="$success"
+  if test "x$have_log4j" = "xyes" ; then
+    ANT_FLAGS="$ANT_FLAGS -Dnoivy="
+  fi
+  AC_SUBST(ANT_FLAGS)
 fi
 AM_CONDITIONAL([WITH_JAVA],
                [test -n "$ANT" -a -n "$JAVA" -a -n "$JAVAC"])