convenient change of ML system architecture via system option ML_preference_64, which is grepped off-line from stored preferences during bootstrap;
#main components for everyday use, without big impact on overall build time
csdp-6.x
cvc4-1.5pre-2
e-1.8
exec_process-1.0.3
Haskabelle-2015
jdk-8u60
jedit_build-20150228
jfreechart-1.0.14-1
jortho-1.0-2
kodkodi-1.5.2
polyml-5.5.3-20150911
scala-2.11.7
spass-3.8ds
xz-java-1.2-1
z3-4.4.0pre