一招一个文件解决ndk编译文件Android.mk配置的所有问题

我们以一个文件实例来说明，看如下配置：

此配置文件生成一个so文件，并链接了boost和openssl

# Copyright (C) 2009 The Android Open Source Project

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0
#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

#

#

LOCAL_PATH := $(call my-dir) #获取当前Android.mk文件的当前路径

include $(CLEAR_VARS) #清除所有变量

LOCAL_MODULE:= libcrypto_dynamic #外部模块名

LOCAL_SRC_FILES:= /cygdrive/D/android-ndk-r9d/sources/openssl-android/libs/armeabi/libcrypto.so
#模块要链接的外部so库文件

LOCAL_EXPORT_C_INCLUDES := /cygdrive/D/android-ndk-r9d/sources/openssl-android/include #模块导出的include路径，以后引用模块名后，则自动添加此包含目录

include $(PREBUILT_SHARED_LIBRARY) #声明一个预编译模块，并不编译为so库，上面的LOCAL_SRC_FILES必须为so文件

include $(CLEAR_VARS)

LOCAL_MODULE:= libssl_dynamic

LOCAL_SRC_FILES:= /cygdrive/D/android-ndk-r9d/sources/openssl-android/libs/armeabi/libssl.so

LOCAL_EXPORT_C_INCLUDES := /cygdrive/D/android-ndk-r9d/sources/openssl-android/include

include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)

#定义一个变量

#local_c_includes := \

# /cygdrive/D/android-ndk-r9d/sources/openssl-android \

# /cygdrive/D/android-ndk-r9d/sources/openssl-android/crypto/asn1 \

# /cygdrive/D/android-ndk-r9d/sources/openssl-android/crypto/evp \

# /cygdrive/D/android-ndk-r9d/sources/openssl-android/include \

#LOCAL_C_INCLUDES += $(local_c_includes) #添加其他include目录

LOCAL_MODULE := hello-jni #模块名

LOCAL_SRC_FILES := hello-jni.cpp #原文件名

LOCAL_WHOLE_STATIC_LIBRARIES += boost_system
#在本模块中引用外部boost_system静态库，注意：boost_system必须是LOCAL_MODULE 指定的名称

LOCAL_WHOLE_STATIC_LIBRARIES += boost_thread
#同上，并且LOCAL_WHOLE_STATIC_LIBRARIES链接静态库不会优化链接进来的静态库的代码

LOCAL_WHOLE_STATIC_LIBRARIES += boost_date_time
#LOCAL_STATIC_LIBRARIES与LOCAL_WHOLE_STATIC_LIBRARIES一样，但要优化链接进的静态库代码

LOCAL_SHARED_LIBRARIES += libcrypto_dynamic
#链接动态库so，并libcrypto_dynamic名必须是LOCAL_MODULE 指定的名称，并且会自动复制到本so库的目录

LOCAL_SHARED_LIBRARIES += libssl_dynamic

#LOCAL_LDLIBS += -lz #链接动态库，一般是链接系统的库用这个，并且不复制到本so库的目录

#LOCAL_LDLIBS += -ldl

include $(BUILD_SHARED_LIBRARY)

$(call import-module, boost_1_55_0) #导入 NDK/sources/boost_1_55_0目录的android.mk文件

所以，有了以上的解释，就可以完美的引用外部动态库so和静态库a文件了.