ABS (Android Build System) generates source code files during compilation

ABS (Android Build System) generates source code files during compilation

Some. c or. H files need to be generated by an interface definition file during compilation. You may also have the following requirements:
* The same interface definition file is used to generate multiple source files.
* The generated source file may be used by other projects.

For example, you need to generate the source file xxx_A.h, xxx_ B .h, and xxx_C.c from the interface definition file xxx. xml through the executable file generator. Command:
Generator A <xxx. xml> xxx_A.h
Generator B <xxx. xml> xxx_ B .h
Generator C <xxx. xml> xxx_C.c

One method is to use the transform-generated-source function defined in ABS:

GENERATOR := $(HOST_OUT_EXECUTABLES)/generator$(HOST_EXECUTABLE_SUFFIX)                                      IDL_DIR := ./                                                                                                 IDL_SRC := $(IDL_DIR)/xxx.xml                                                                                    IDL_TGT_CODE := $(IDL_DIR)/xxx_C.c                                                                        IDL_TGT_A := $(IDL_DIR)/xxx_A.h                                                        IDL_TGT_B := $(IDL_DIR)/xxx_B.h                                                                                                                                                                                 GEN := $(LOCAL_PATH)/$(IDL_TGT_A)                                                                          $(GEN): PRIVATE_PATH := $(LOCAL_PATH)                                                                                    $(GEN): PRIVATE_CUSTOM_TOOL = $(GENERATOR) A < $< > $@                                                 $(GEN): $(LOCAL_PATH)/$(IDL_SRC)                                                                                           $(transform-generated-source)                                                                                                                                                                                                                 LOCAL_GENERATED_SOURCES += $(GEN)                                                                                                                                                                                                                 GEN := $(LOCAL_PATH)/$(IDL_TGT_B)                                                                          $(GEN): PRIVATE_PATH := $(LOCAL_PATH)                                                                                    $(GEN): PRIVATE_CUSTOM_TOOL = $(GENERATOR) B < $< > $@                                                 $(GEN): $(LOCAL_PATH)/$(IDL_SRC)                                                                                           $(transform-generated-source)                                                                                                                                                                                                                 LOCAL_GENERATED_SOURCES += $(GEN)                                                                                                                                                                                                                 GEN := $(LOCAL_PATH)/$(IDL_TGT_CODE)                                                                                   $(GEN): PRIVATE_PATH := $(LOCAL_PATH)                                                                                    $(GEN): PRIVATE_CUSTOM_TOOL = $(GENERATOR) C < $< > $@                                                          $(GEN): $(LOCAL_PATH)/$(IDL_SRC) $(LOCAL_PATH)/$(IDL_TGT_A) $(LOCAL_PATH)/$(IDL_TGT_B)         $(transform-generated-source)                                                                                                                                                                                                                 LOCAL_GENERATED_SOURCES += $(GEN)      ...LOCAL_SRC_FILES := \                    $(IDL_TGT_CODE) \                 ...

 

If there are multiple interface definition files, such as a. xml and B. xml, the following method may be more convenient.
 

GENERATOR := $(HOST_OUT_EXECUTABLES)/generator$(HOST_EXECUTABLE_SUFFIX) IDL_DIR := ./     IDL_TGT_CODE := $(IDL_DIR)/xxx_C.c                                                                                                                                                          define transform-generated-A                                        @echo "target Generated $@ <= $<"                                                         $(GENERATOR) A < $< > $@                                                endef                                                                                                                                                                               define transform-generated-B                                        @echo "target Generated $@ <= $<"                                                         $(GENERATOR) B < $< > $@                                                endef                                                                                                                                                                               define transform-generated-C                                               @echo "target Generated $@ <= $<"                                                         $(GENERATOR) C < $< > $@                                                         endef                                                                                                                                                                               $(LOCAL_PATH)/$(IDL_DIR)/%_A.h : $(LOCAL_PATH)/$(IDL_DIR)/%.xml             $(transform-generated-A)                                                                                                                                  $(LOCAL_PATH)/$(IDL_DIR)/%_B.h : $(LOCAL_PATH)/$(IDL_DIR)/%.xml             $(transform-generated-B)                                                                                                                                  $(LOCAL_PATH)/$(IDL_DIR)/%-C.c : $(LOCAL_PATH)/$(IDL_DIR)/%.xml                    $(transform-generated-C)                                               ...LOCAL_SRC_FILES := \                    $(IDL_TGT_CODE) \                 ...LOCAL_ADDITIONAL_DEPENDENCIES += $(LOCAL_PATH)/xxx_A.h  $(LOCAL_PATH)/xxx_B.h   

 

In addition, if you want to compile several specific binary files in the image with symbol, you can add the following in Android. mk:

LOCAL_STRIP_MODULE: = false