device/qcom/msm8625/BoardConfig.mk

TARGET_CPU_ABI  := armeabi-v7a

TARGET_CPU_ABI2 := armeabi

TARGET_ARCH_VARIANT := armv7-a-neon

TARGET_BOARD_PLATFORM := msm7627a

TARGET_BOOTLOADER_BOARD_NAME := 7x27

TARGET_CPU_SMP := true

TARGET_AVOID_DRAW_TEXTURE_EXTENSION := true

TARGET_USES_16BPPSURFACE_FOR_OPAQUE := true

Board部分配置如上:

vendor/qcom/proprietary/common/config/device-vendor.mk

ifneq (, $(filter $(PRODUCT_LIST), $(TARGET_PRODUCT)))

  include device/qcom/$(TARGET_PRODUCT)/BoardConfig.mk

  ifeq ($(call is-board-platform,msm8660),true)     这里判断当前平台是否是msm8660. 

    PREBUILT_BOARD_PLATFORM_DIR := msm8660_surf

  else ifeq ($(TARGET_PRODUCT),msm8625)

    PREBUILT_BOARD_PLATFORM_DIR := msm8625

  else

   #PREBUILT_BOARD_PLATFORM_DIR := $(TARGET_BOARD_PLATFORM)

    PREBUILT_BOARD_PLATFORM_DIR := msm8625

  endif

 84 # $(call is-board-platform,bp)

 85 # returns true or empty

 86 define is-board-platform

 87 $(call match-word,$(1),$(TARGET_BOARD_PLATFORM))

 88 endef

 89 

 90 # $(call is-not-board-platform,bp)

 91 # returns true or empty

 92 define is-not-board-platform

 93 $(if $(call match-word,$(1),$(TARGET_BOARD_PLATFORM)),,true)

 94 endef

 95 

 96 # $(call is-board-platform-in-list,bpl)

 97 # returns true or empty

 98 define is-board-platform-in-list

 99 $(call match-word-in-list,$(TARGET_BOARD_PLATFORM),$(1))      

匹配当前的TARGET_BOARD_PLATFORM ,也就是msm7627a 是否在定义的列表里面. 这个就是关键用法.

100 endef

101 

102 # $(call is-vendor-board-platform,vendor)

103 # returns true or empty

104 define is-vendor-board-platform

105 $(strip \

106   $(call match-word-in-list,$(TARGET_BOARD_PLATFORM),\

107     $(call get-vendor-board-platforms,$(1)) \

108   ) \

109 )

110 endef

vim device/qcom/common/utils.mk

# vars for use by utils  2 empty :=  3 space := $(empty) $(empty)  4 colon := $(empty):$(empty)  5 underscore := $(empty)_$(empty)  6   7 # $(call match-word,w1,w2)  8 # checks if w1 == w2  9 # How it works 10 #   if (w1-w2 not empty or w2-w1 not empty) then not_match else match 11 # 12 # returns true or empty 13 #$(warning :$(1): :$(2): :$(subst $(1),,$(2)):) \ 14 #$(warning :$(2): :$(1): :$(subst $(2),,$(1)):) \ 15 # 16 define match-word 17 $(strip \ 18   $(if $(or $(subst $(1),$(empty),$(2)),$(subst $(2),$(empty),$(1))),,true) \ 19 ) 20 endef  1 # vars for use by utils  2 empty :=  3 space := $(empty) $(empty)  4 colon := $(empty):$(empty)  5 underscore := $(empty)_$(empty)  6   7 # $(call match-word,w1,w2)  8 # checks if w1 == w2  9 # How it works 10 #   if (w1-w2 not empty or w2-w1 not empty) then not_match else match 11 # 12 # returns true or empty 13 #$(warning :$(1): :$(2): :$(subst $(1),,$(2)):) \ 14 #$(warning :$(2): :$(1): :$(subst $(2),,$(1)):) \ 15 # 16 define match-word 17 $(strip \ 18   $(if $(or $(subst $(1),$(empty),$(2)),$(subst $(2),$(empty),$(1))),,true) \