eo: we can rely on LD_PRELOAD for those hook, so removing them.
eo2: make text message more consitent with the test.
eo: memset will be faster, still why not using NULL instead of -1 ?
remove 'const' where is should not be
add static build of eo2-bench
add total time in [ms] in eo2-bench report
add EO2ONLY env var to eo2-bench
Refactored to put the preprocessing code in Eo_preprocessor.h