ifeq ("$(origin O)", "command line")
OUT_DIR := $(O)
$(shell echo "Makefile_log:var O is in the command line" >&2;)
else
$(shell echo "Makefile_log:var O is in the current dir" >&2;)
endif
OUT_DIR := $(O)
$(shell echo "Makefile_log:var O is in the command line" >&2;)
else
$(shell echo "Makefile_log:var O is in the current dir" >&2;)
endif