common/autoconf/configure.ac

*** 86,95 ****
--- 86,98 ----
  # These are needed to be able to create a configuration name (and thus the output directory)
  JDKOPT_SETUP_JDK_VARIANT
  JDKOPT_SETUP_JVM_VARIANTS
  JDKOPT_SETUP_DEBUG_LEVEL
  
+ # Check if it's a pure open build or if custom sources are to be used.
+ JDKOPT_SETUP_OPEN_OR_CUSTOM
+ 
  # With basic setup done, call the custom early hook.
  CUSTOM_EARLY_HOOK
  
  # To properly create a configuration name, we need to have the OpenJDK target
  # and options (variants and debug level) parsed.