mac os x 将C文件编译成.so库
应用背景
将C语言写好的代码提供给unity调用，项目要在Android手机上运行，所以要将C代码编译成.so库。因为要用到opencv对图像操作，这里把opencvsdk也放进去了。
步骤：
1、下载安装Android studio（其实也可以不下载，楼主为了省事，直接安装Android studio，目的还是为了安装ndk,sdk）;
2、配置文件
2.1 jni文件及路径(jni文件下载路径：http://download.csdn.net/detail/boy313918205/9724639)
jni路径：/Users/xlsj/Desktop/dalaofei/MarkerLessARAndroid/jni
2.2 NDK路径：/Users/xlsj/Desktop/dalaofei/NingBoSubway/android-ndk-r10b
这里使用NDK是：android-ndk64-r10b-darwin-x86_64.tar
2.3 opencv sdk路径：/Users/xlsj/Desktop/dalaofei/OpenCV-2.4.9-android-sdk
这里下载使用的opencv是OpenCV-2.4.9-android-sdk。
一下是jni文件中的文件及代码，在步骤2中下载的jni文件中已经包含。
3、Android.mk文件中代码：
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
MAIN_DIR:=$(LOCAL_PATH)
OPENCV_LIB_TYPE:=STATIC
ifeq ("$(wildcard $(OPENCV_MK_PATH))","")
#try to load OpenCV.mk from default install location
include /Users/xlsj/Desktop/dalaofei/OpenCV-2.4.9-android-sdk/sdk/native/jni/OpenCV.mk
else
include $(OPENCV_MK_PATH)
endif
LOCAL_PATH:=$(MAIN_DIR)
LOCAL_MODULE:=OpenCV
include $(BUILD_SHARED_LIBRARY)
include $(CLEAR_VARS)
OpenCV_CAMERA_MODULES:=on
OpenCV_INSTALL_MODULES:=off
OpenCV_LIB_TYPE:=STATIC
include /Users/xlsj/Desktop/dalaofei/OpenCV-2.4.9-android-sdk/sdk/native/jni/OpenCV.mk
LOCAL_MODULE := MarkerLessARAndroid
LOCAL_C_INCLUDES += $(LOCAL_PATH)
LOCAL_SRC_FILES := $(LOCAL_PATH)/ARMarkerLessAndroid.cpp
LOCAL_SHARED_LIBRARIES+=OpenCV
LOCAL_LDLIBS += -llog -ldl -DNDEBUG
LOCAL_LDFLAGS += -pthread -fopenmp
LOCAL_CFLAGS += -DNDEBUG -O1 -O2 -O3 -Os -Ofast -ffunction-sections -fdata-sections -mfloat-abi=softfp -mfpu=neon
LOCAL_CPPFLAGS := -std=c++11 -pthread -frtti -fexceptions -DNDEBUG -O1 -O2 -O3 -Os -Ofast -ffunction-sections -fdata-sections -mfloat-abi=softfp -mfpu=neon -fopenmp
LOCAL_ARM_NEON := true
LOCAL_ARM_MODE := arm
include $(BUILD_SHARED_LIBRARY)
4、
Application.mk文件中代码：
APP_CPPFLAGS := -frtti -fexceptions -mfloat-abi=softfp -mfpu=neon -std=gnu++0x -Wno-deprecated \
-ftree-vectorize -ffast-math -fsingle-precision-constant --std=c++11
NDK_TOOLCHAIN_VERSION := 4.9
APP_CFLAGS := --std=c++11
APP_ABI :=armeabi-v7a
APP_OPTIM := release
APP_SHORT_COMMANDS := true
APP_PLATFORM := android-19
5、
build.sh中代码：
#!/bin/bash
# To build a new jni .so
# and copy the file to where it should stay
FILENAME="libMarkerARAndroid.so"
PROJECT_PATH=$(dirname $(cd $(dirname ${BASH_SOURCE[0]} ); pwd ) )
DEST_PATH="/Users/xlsj/Desktop/dalaofei/MarkerLessARAndroid/jni"
NDK_PATH="/Users/xlsj/Desktop/dalaofei/NingBoSubway/android-ndk-r10b"
if [ $(basename $(pwd) ) !="jni" ];then
export NDK_PROJECT_PATH=$PROJECT_PATH
fi
${NDK_PATH}/ndk-build
if [ ! -e ${PROJECT_PATH}/libs/armeabi-v7a/${FILENAME} ];then
echo" Compile process failed, no .so file. "
echo"--------------------------------------"
else
echo" Has compiled. "
echo"---------------"
if [ -e ${DEST_PATH}/armeabi-v7a/${FILENAME} ];then
rm --preserve ${DEST_PATH}/armeabi-v7a/${FILENAME}
echo" The old jni .so has been deleted. "
echo"-------------------------------"
fi
cp ${PROJECT_PATH}/libs/armeabi-v7a/${FILENAME} ${DEST_PATH}/armeabi-v7a/${FILENAME}
fi
#${NDK_PATH}/ndk-build clean
echo" Has done and cleaned."
:<
!EOF!
以上代码中有opencv，ndk等路径需要修改
6 在终端中运行build.sh
在苹果主界面菜单按顺序：前往——>实用工具——>终端；
在终端中输入build.sh路劲并运行。
如图：
运行结果，jni同级目录中生产“libs”和“obj”文件。
将运行文件
中的.so文件拷贝中unity中便可以实用。