android -- 编译不同库及编译脚本之区别

我们经常会编译不同库在不同的场合下，而也经常与第三方有合作，对方提供静态库，动态库及配置文件，也有可能需要提供库给对方等等，借此机会将所使用的一些情况作个总结。下面写的android.mk都是一些模板，可能模块可能不需要但加上也无所谓，必要时直接加即可。

1、编译生成动态库

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)


# [optional, user, eng] 
# eng = required
# optinal = no install on target
LOCAL_MODULE_TAGS := eng


# This is the target being built.
LOCAL_MODULE:= libxxx


# Target install path.
LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)


# All of the source files that we will compile.
LOCAL_SRC_FILES:= \
xxx.c 
yyy.cpp


# All of the shared libraries we link against.
LOCAL_SHARED_LIBRARIES := \
libcutils \
libutils \
liblog \


# No static libraries.
LOCAL_STATIC_LIBRARIES := \


# Also need other headers.
LOCAL_C_INCLUDES += \
    frameworks/base/include/ \


# No specia compiler flags.
LOCAL_CFLAGS += -D_cplusplus


# Don't prelink this library.  For more efficient code, you may want
# to add this library to the prelink map and set this to true.
LOCAL_PRELINK_MODULE := false


include $(BUILD_SHARED_LIBRARY)

2、编译静态库

对上在最后一名：include $(BUILD_SHARED_LIBRARY)

改成：

include $(BUILD_STATIC_LIBRARY)

3、编译生成可执行文件

最后一句修改成 

include $(BUILD_EXECUTABLE)

4、编译生成jar包：

LOCAL_PATH := $(call my-dir)


# the library
# ============================================================
include $(CLEAR_VARS)


LOCAL_MODULE:= libandroidtest
LOCAL_MODULE_TAGS := eng 


LOCAL_SRC_FILES := \
            $(call all-subdir-java-files)


LOCAL_SRC_FILES += \
     $(call all-java-files-under, ../gen)

#LOCAL_SRC_FILES += \
android/net/telecast/INetworkServiceManager.aidl \
### 对于aidl文件不加入到framework/base下的android.mk在线无法编译，可以提前生成aidl的java文件放在gen目录下进行编译

include $(BUILD_JAVA_LIBRARY)

5、只需要拷贝某个文件到目录下而不需要使用其中间编译结果

include $(CLEAR_VARS)


LOCAL_MODULE := libandroidtest.xml
LOCAL_MODULE_TAGS := eng 


LOCAL_MODULE_CLASS := ETC


# This will install the file in /system/etc/permissions
#
LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)/permissions


LOCAL_SRC_FILES := $(LOCAL_MODULE)


include $(BUILD_PREBUILT)

6、与5条相似，但其它库需要这个中间编译obj，这个对静态库非常重要

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
$(call add-prebuilt-files, STATIC_LIBRARIES, libchfp.a)

或者写成：

LOCAL_PATH:= $(call my-dir)


#include $(CLEAR_VARS)
#LOCAL_MODULE_TAGS := eng
#$(call add-prebuilt-files, STATIC_LIBRARIES, libchfp.a)


include $(CLEAR_VARS)
LOCAL_SRC_FILES := libchfp.a
LOCAL_BUILT_MODULE_STEM := libchfp.a
LOCAL_MODULE_SUFFIX := lib
LOCAL_MODULE := libchfp
LOCAL_MODULE_CLASS := STATIC_LIBRARIES
LOCAL_MODULE_TAGS := optional
include $(BUILD_PREBUILT)