LUFA/Build/lufa_build.mk

   1 #
   2 #             LUFA Library
   3 #     Copyright (C) Dean Camera, 2015.
   4 #
   5 #  dean [at] fourwalledcubicle [dot] com
   6 #           www.lufa-lib.org
   7 #
   8
   9 DMBS_BUILD_MODULES         +=
  10 DMBS_BUILD_TARGETS         +=
  11 DMBS_BUILD_MANDATORY_VARS  += LUFA_PATH ARCH F_USB
  12 DMBS_BUILD_OPTIONAL_VARS   += BOARD
  13 DMBS_BUILD_PROVIDED_VARS   +=
  14 DMBS_BUILD_PROVIDED_MACROS +=
  15
  16 # -----------------------------------------------------------------------------
  17 #               LUFA Core Build Buildsystem Makefile Module.
  18 # -----------------------------------------------------------------------------
  19 # DESCRIPTION:
  20 #   Subclass of the standard DMBS GCC build module, with LUFA specific
  21 #   extensions. This module provides the core build rules for the compilation
  22 #   of LUFA projects using GCC.
  23 # -----------------------------------------------------------------------------
  24 # TARGETS:
  25 #
  26 #    (None)
  27 #
  28 # MANDATORY PARAMETERS:
  29 #
  30 #    LUFA_PATH                 - Path to the LUFA library core
  31 #    ARCH                      - Device architecture name
  32 #    F_USB                     - Speed of the USB core clock, in Hz
  33 #
  34 # OPTIONAL PARAMETERS:
  35 #
  36 #    BOARD                     - LUFA board drivers to use
  37 #
  38 # PROVIDED VARIABLES:
  39 #
  40 #    (None)
  41 #
  42 # PROVIDED MACROS:
  43 #
  44 #    (None)
  45 #
  46 # -----------------------------------------------------------------------------
  47
  48 SHELL = /bin/sh
  49
  50 ERROR_IF_UNSET   ?= $(if $(filter undefined, $(origin $(strip $(1)))), $(error Makefile $(strip $(1)) value not set))
  51 ERROR_IF_EMPTY   ?= $(if $(strip $($(strip $(1)))), , $(error Makefile $(strip $(1)) option cannot be blank))
  52 ERROR_IF_NONBOOL ?= $(if $(filter Y N, $($(strip $(1)))), , $(error Makefile $(strip $(1)) option must be Y or N))
  53
  54 # Sanity check user supplied values
  55 $(call ERROR_IF_EMPTY, LUFA_PATH)
  56 $(call ERROR_IF_EMPTY, ARCH)
  57 $(call ERROR_IF_EMPTY, F_USB)
  58
  59 # Default values of optionally user-supplied variables
  60 BOARD ?= NONE
  61
  62 # Determine the utility prefix to use for the selected architecture
  63 ifeq ($(ARCH), XMEGA)
  64    $(warning The XMEGA device support is currently EXPERIMENTAL (incomplete and/or non-functional), and is included for preview purposes only.)
  65 else ifeq ($(ARCH), UC3)
  66    $(warning The UC3 device support is currently EXPERIMENTAL (incomplete and/or non-functional), and is included for preview purposes only.)
  67 endif
  68
  69 # LUFA specific standard build options
  70 C_FLAGS += -I. -I$(patsubst %/,%,$(LUFA_PATH))/..
  71 C_FLAGS += -DARCH=ARCH_$(ARCH) -DBOARD=BOARD_$(BOARD) -DF_USB=$(F_USB)UL
  72
  73 # This flag is required for bootloaders as GCC will emit invalid jump table
  74 # assembly code for devices with large amounts of flash; the jump table target
  75 # is extracted from FLASH without using the correct ELPM instruction, resulting
  76 # in a pseudo-random jump target.
  77 C_FLAGS += -fno-jump-tables
  78
  79 DMBS_PATH := $(LUFA_PATH)/Build/DMBS/DMBS
  80 include $(DMBS_PATH)/gcc.mk