Makefile.identify-target

# This Makefile can be used to identify the selected TARGET used for a
# specific build. It can be included by example Makefiles that need to take
# decisions based on TARGET. It is also automatically included by the
# top-level Makefile.include. This Makefile also contains basic validation
# of some TARGET-related variables so a faulty make invocation immediately
# stops with a readable error message.

# Build will fail with strange error messages if $(TARGET)/$(BOARD)
# contains trailing whitespace.
ifneq ($(TARGET), $(strip $(TARGET)))
  $(error Target name '$(TARGET)' contains trailing whitespace)
endif

ifneq ($(BOARD), $(strip $(BOARD)))
  $(error Board name '$(BOARD)' contains trailing whitespace)
endif

ifeq ($(TARGET),)
  -include Makefile.target
  ifeq ($(TARGET),)
    ${info TARGET not defined, using target 'native'}
    TARGET=native
  else
    ${info using saved target '$(TARGET)'}
  endif
endif