android NDK 使用（多个）静态库生成动态库

android NDK 使用(多个)静态库生成动态库。

1、编写Android.mk文件：如下两种方式都可以，用于NDK编译工具生成的两个.a文件来生成最终的libtwolib-second.so动态库。

LOCAL_PATH:=$(callmy-dir)

include$(CLEAR_VARS)

LOCAL_MODULE:=libtwolib-second

LOCAL_SRC_FILES:=second.c

LOCAL_LDFLAGS:=first.athird.a

LOCAL_LDLIBS:=-L$(SYSROOT)/usr/lib-llog

include$(BUILD_SHARED_LIBRARY)

方式二：

LOCAL_PATH:=$(callmy-dir)

include$(CLEAR_VARS)

LOCAL_MODULE:=libtwolib-first

LOCAL_SRC_FILES:=first.a

include$(PREBUILT_STATIC_LIBRARY)

include$(CLEAR_VARS)

LOCAL_MODULE:=libtwolib-third

LOCAL_SRC_FILES:=third.a

include$(PREBUILT_STATIC_LIBRARY)

include$(CLEAR_VARS)

LOCAL_MODULE:=libtwolib-second

LOCAL_SRC_FILES:=second.c

LOCAL_STATIC_LIBRARIES:=libtwolib-firstlibtwolib-third

LOCAL_LDLIBS:=-L$(SYSROOT)/usr/lib-llog

include$(BUILD_SHARED_LIBRARY)

2、生成动态库

# Android.mk for FFmpeg

# Lei Xiaohua à×???è

# leixiaohua1020@126.com

# https://blog.csdn.net/leixiaohua1020

#

LOCAL_PATH := $(call my-dir)

# FFmpeg library

include $(CLEAR_VARS)

LOCAL_MODULE := avcodec

LOCAL_SRC_FILES := libavcodec-57.so

include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)

LOCAL_MODULE := avdevice

LOCAL_SRC_FILES := libavdevice-57.so

include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)

LOCAL_MODULE := avfilter

LOCAL_SRC_FILES := libavfilter-6.so

include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)

LOCAL_MODULE := avformat

LOCAL_SRC_FILES := libavformat-57.so

include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)

LOCAL_MODULE := avresample

LOCAL_SRC_FILES := libavresample-3.so

include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)

LOCAL_MODULE := avutil

LOCAL_SRC_FILES := libavutil-55.so

include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)

LOCAL_MODULE := swresample

LOCAL_SRC_FILES := libswresample-2.so

include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)

LOCAL_MODULE := swscale

LOCAL_SRC_FILES := libswscale-4.so

include $(PREBUILT_SHARED_LIBRARY)

# Program

include $(CLEAR_VARS)

LOCAL_MODULE := sffstreamer

LOCAL_SRC_FILES :=simplest_ffmpeg_streamer.c

LOCAL_C_INCLUDES += $(LOCAL_PATH)/include

LOCAL_LDLIBS := -llog -lz

LOCAL_SHARED_LIBRARIES := avcodec avdevice avfilter avformat avutil avresample swresample swscale

include $(BUILD_SHARED_LIBRARY)

附：

可以直接编写Android.mk文件来生成两个.a文件，如下：

LOCAL_PATH:=$(callmy-dir)

include$(CLEAR_VARS)

LOCAL_MODULE:=libtwolib-first

LOCAL_SRC_FILES:=first.c

include$(BUILD_STATIC_LIBRARY)

include$(CLEAR_VARS)

LOCAL_MODULE:=libtwolib-third

LOCAL_SRC_FILES:=third.c

include$(BUILD_STATIC_LIBRARY)

include$(CLEAR_VARS)

LOCAL_MODULE:=libtwolib-second

LOCAL_SRC_FILES:=second.c

LOCAL_STATIC_LIBRARIES:=libtwolib-firstlibtwolib-third

LOCAL_LDLIBS:=-L$(SYSROOT)/usr/lib-llog

include$(BUILD_SHARED_LIBRARY)