Android compilation system and android Compilation

Android compilation system and android Compilation
TARGET: PREFEQUISTES COMMANDS

main.c #include <stdio.h>#include <utility.h>int main(int argc,char *argv[]){    printf("%d",getNumber());    return 0;}utility.hint getNumber();utility.cint getNumber(){    return 2;}

Example

SimpleMakefile: main. o utility. o gcc-o SimpleMakefile main. o utility. omain. o: main. c gcc-c main. cutility. o: utility. c gcc-c utility. cMakefile (another method) OBEJCT = main. o utility. oSimpleMakefile: $ (OBEJCT) gcc-o SimpleMakefile $ (OBEJCT)

Android system Compilation:

# The main files and the last installed-files.txt generated during the droidcore generation process record the pre-installation program module # generate all executable packages of the system, such as system. img boot. img recovery. img and so on. PHONY: droidcoredroidcore: files \ systemimage \ $ (bytes) \ $ (INSTALLED_RECOVERYIMAGE_TARGET) \ $ (INSTALLED_USERDATAIMAGE_TARGET) \ $ (bytes) \ $ (INSTALLED_FILES_FILE) ------------------------------ files ------------------------------------------- # focus on the file generation process # prebuilt this mechanism is used in earlier versions. PHONY: filesfiles: prebuilt \ $ (modules_to_install) \ $ (INSTALLED_ANDROID_INFO_TXT_TARGET) # describe the modules to be installed in the system # list of the installation files for each product_FILES Module # tags_to_install indicates the module for selective compilation # get-tagged-modules to determine whether the target has a "reject" tag, if any, modules_to_install :=$ (sort \ $ (ALL_DEFAULT_INSTALLED_MODULES) \ $ (product_FILES) \ $ (foreach tag, $ (tags_to_install), $ (tag) _ MODULES) \ $ (call get-tagged-modules, shell _ $ (TARGET_SHELL) \ $ (CUSTOM_MODULES )\) define systemimage --------------------------------- # This definition is in build/core/Makefile # BUILT_SYSTEMIMAGE: = $ (systemimage_intermediates)/system. img finally generates system. imgfile # $ @ indicates the target set $ (INSTALLED_SYSTEMIMAGE): $ (BUILT_SYSTEMIMAGE) $ (RECOVERY_FROM_BOOT_PATCH) | $ (ACP) @ echo "Install system fs image: $ @ "$ (copy-file-to-target) $ (hide) $ (call assert-max-image-size, $ @ $ (RECOVERY_FROM_BOOT_PATCH), $ (BOARD_SYSTEMIMAGE_PARTITION_SIZE ), yaffs) systemimage: $ (INSTALLED_SYSTEMIMAGE )----------------------------------------------------------------------------

# Generate the dist folder in the out directory to store multiple distribution packages # dist_files only for putting your library into the dist directory with a full build .. PHONY: dist_files

Android. mk system example

• Take android. mk of the $ (source code) \ system \ core \ adb project as an example.

# Copyright 2005 The Android Open Source Project # Android. mk for adb # LOCAL_PATH: = $ (call my-dir) # adb host tool #============================================= ==================================#clear_vars clears the variable include $ (CLEAR_VARS) other than the hundreds of LOCAL_PATH Variables) # Default to a virtual (sockets) usb interface # define usb drive USB_SRCS: = EXTRA_SRCS: = ifeq ($ (HOST_ OS), linux) USB_SRCS: = usb_linux.c EXTRA_SRCS: = get_my_path_linux.c LOCAL_LDLIBS + =-lrt-ldl-lpthread LOCAL_CFLAGS + =-Runtime ($ (HOST_ OS), darwin) USB_SRCS: = usb_osx.c EXTRA_SRCS: = get_my_path_darwin.c LOCAL_LDLIBS + =-lpthread-framework CoreFoundation-framework IOKit-framework carbonendi1_eq ($ (HOST_ OS), freebsd) USB_SRCS: = usb_libusb.c EXTRA_SRCS: = get_my_path_freebsd.c LOCAL_LDLIBS + =-lpthread-lusbendistmeq ($ (HOST_ OS), windows) USB_SRCS: = usb_windows.c EXTRA_SRCS: = get_my_path_windows.c .. /libcutils/list. c EXTRA_STATIC_LIBS: = AdbWinApi ifneq ($ (strip $ (USE_CYGWIN )),) # Pure cygwin case LOCAL_LDLIBS + =-lpthread-lgdi32 LOCAL_C_INCLUDES + =/usr/include/w32api/ddk endif ifneq ($ (strip $ (USE_MINGW )),) # MinGW under Linux case LOCAL_LDLIBS + =-lws2_32-lgdi32 USE_SYSDEPS_WIN32: = 1 LOCAL_C_INCLUDES + =/usr/i586-mingw32msvc/include/ddk endif LOCAL_C_INCLUDES + = development/host/windows/usb/api/endif # define all the source files used in this module including LOCAL_SRC_FILES: = \ adb. c \ console. c \ transport. c \ transport_local.c \ transport_usb.c \ commandline. c \ adb_client.c \ adb_auth_host.c \ sockets. c \ services. c \ Users \ $ (EXTRA_SRCS) \ $ (USB_SRCS) \ Users + = external/openssl/includeifneq ($ (USE_SYSDEPS_WIN32),) LOCAL_SRC_FILES + = export LOCAL_SRC_FILES + = fdevent. cendifLOCAL_CFLAGS + =-O2-g-DADB_HOST = 1-Wall-Wno-unused-parameterLOCAL_CFLAGS + =-D_XOPEN_SOURCE-D_GNU_SOURCE # Name of the module to be generated LOCAL_MODULE: = adbLOCAL_MODULE_TAGS: = debug # compile the library LOCAL_STATIC_LIBRARIES: = libzipfile libunz libcrypto_static $ (EXTRA_STATIC_LIBS) ifeq ($ (USE_SYSDEPS_WIN32 ),) LOCAL_STATIC_LIBRARIES + = libcutilsendif # generate a Host executable file include $ (BUILD_HOST_EXECUTABLE) $ (call dist-for-goals, dist_files sdk, $ (LOCAL_BUILT_MODULE )) ifeq ($ (HOST_ OS), windows) $ (LOCAL_INSTALLED_MODULE): \ $ (HOST_OUT_EXECUTABLES)/AdbWinApi. dll \ $ (HOST_OUT_EXECUTABLES)/AdbWinUsbApi. dllendif # adbd device daemon #================================== ==================================## the second module compilation start flag include $ (CLEAR_VARS) LOCAL_SRC_FILES: = \ adb. c \ backup_service.c \ fdevent. c \ transport. c \ transport_local.c \ transport_usb.c \ adb_auth_client.c \ sockets. c \ services. c \ file_sync_service.c \ jdwp_service.c \ framebuffer_service.c \ remount_service.c \ Users: =-O2-g-DADB_HOST = 0-Wall-Wno-unused-parameterLOCAL_CFLAGS + =-D_XOPEN_SOURCE-sources (, $ (filter userdebug eng, $ (TARGET_BUILD_VARIANT) LOCAL_CFLAGS + =-DALLOW_ADBD_ROOT = 1 endif # Name of the module to be generated LOCAL_MODULE: = modules: = trueLOCAL_MODULE_PATH: = $ (modules) LOCAL_UNSTRIPPED_PATH: = $ (TARGET_ROOT_OUT_SBIN_UNSTRIPPED) LOCAL_STATIC_LIBRARIES: = liblog libcutils libc libmincrypt # generate adbd executable file include $ (BUILD_EXECUTABLE)

Android. mk variable Parsing

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