In configure, it's imperative that you pair an AC_CHECKING with an AC_RESULT, before you do any other output. This patch fixes two places where this was not done. Bug: https://bugs.openjdk.java.net/browse/JDK-8245041 WebRev: http://cr.openjdk.java.net/~ihse/JDK-8245041-fix-AC_RESULT-wrong/webrev.01 /Magnus