Check build/core/Makefile, it should give you a start to trace source
code.

build/core/Makefile:
ifdef WITH_DEXPREOPT
  ifndef DISABLE_DEXPREOPT
    with_dexpreopt := true
  endif
endif
ifdef with_dexpreopt
  # This file will set BUILT_SYSTEMIMAGE and SYSTEMIMAGE_SOURCE_DIR
  include build/tools/dexpreopt/Config.mk
else
  BUILT_SYSTEMIMAGE := $(BUILT_SYSTEMIMAGE_UNOPT)
  SYSTEMIMAGE_SOURCE_DIR := $(TARGET_OUT)
endif

regards,
ymhuang

On Aug 31, 6:56 pm, Victor <[email protected]> wrote:
> Dear All,
>
> Who knows, what is DISABLE_DEXPREOPT parameter managing?
> What for used dexpreopt feature? What is this useful/useless for?
>
> Thanks in advance.
> Victor.
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