ifeq ($(BUILD_DIRS_ONLY),1)
DIRS := lib/System lib/Support utils
OPTIONAL_DIRS :=
else
DIRS := lib/System lib/Support utils lib/VMCore lib tools/llvm-config \
tools runtime docs unittests
ifeq ($(BUILD_DIRS_ONLY),1)
DIRS := lib/System lib/Support utils
OPTIONAL_DIRS :=
else
DIRS := lib/System lib/Support utils lib/VMCore lib tools/llvm-config \
tools runtime docs unittests