This change in the "configure" script is needed for the custom-hook.m4 to be able to include additional files from the CUSTOM_CONFIG_DIR. Bug: https://bugs.openjdk.java.net/browse/JDK-8210150 WebRev: http://cr.openjdk.java.net/~ihse/JDK-8210150-split-up-custom-hook-m4-open/webrev.01 /Magnus