阿里云oss c-sdk交叉编译

1 简介

阿里云官方地址：
https://github.com/aliyun/aliyun-oss-c-sdk/blob/master/README-CN.md

目前device平台设备为嵌入式linux环境，故选择使用C-SDK作为开发接口包实现对OSS基本操作是应用。

依赖库：

• Libcurl
• Apr
• apr-util
• minixml

2 libcurl 库

源码：https://curl.haxx.se/download.html

./configure --prefix=/home/jw.li/work/v50/osssdk/curl --host=arm-openwrt-linux CC=/home/jw.li/work/toolchain-arm_cortex-a7+vfp_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/arm-openwrt-linux-gcc CXX=/home/jw.li/work/toolchain-arm_cortex-a7+vfp_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/arm-openwrt-linux-g++
Make
Make install

- –prefix： 安装目录 即make install之后 include lib 位置所在目录。（后面相同就不说了）
- –host：该软件将要运行的平台
- CC：交叉编译gcc工具
- CXX：交叉编译g++工具

curl 很给面子 很容易就成功了

3 apr-1.5.2

跟着阿里小哥走 用的1.5.2

完整编译流程见3.3

./configure CC=/home/jw.li/work/toolchain-arm_cortex-a7+vfp_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/arm-openwrt-linux-gcc CXX=/home/jw.li/work/toolchain-arm_cortex-a7+vfp_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/arm-openwrt-linux-g++ --host=arm-openwrt-linux --prefix=/home/jw.li/work/v50/osssdk/apr  ac_cv_file__dev_zero=yes ac_cv_func_setpgrp_void=yes apr_cv_process_shared_works=yes apr_cv_mutex_robust_shared=yes apr_cv_tcp_nodelay_with_cork=yes ap_void_ptr_lt_long=no 

3.1 报错./include/apr_want.h:94:8: error: redefinition of ‘struct iovec’

解决：

vi include/apr_want.h
在编译的过程中会提示“iovec定义重复”在/apr/include目录。修改apr_want.h文件。将

  #ifndef APR_IOVEC_DEFINED
  #define APR_IOVEC_DEFINED
  struct iovec
 {
 void *iov_base;
  size_t iov_len;
  };  
  #endif /* !APR_IOVEC_DEFINED */
改为
  #if  0
 struct iovec
 {
 void *iov_base;
  size_t iov_len;
  };  
  #endif /* !APR_IOVEC_DEFINED */

3.2报错encoding/apr_escape.c:79:33: error: ‘test_char_table’ undeclared

tools/gen_test_char > include/private/apr_escape_test_char.h
/bin/bash: tools/gen_test_char: cannot execute binary file: Exec format error

原因：

因为gen_test_char 使用编译工具编译出来的，但交叉编译出的gen_test_char这个工具在宿主机上无法使用，
所以可以先./configure 再make 将工具保存起来 在执行交叉编译configure，再把工具cp回原位置并修改makefile 执行即解决

3.3 完整编译流程（解决了以上两问题）

1 ./configure
2 Make
3 cp -a tools/gen_test_char ..
4 Make clean
5 ./configure CC=/home/jw.li/work/toolchain-arm_cortex-a7+vfp_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/arm-openwrt-linux-gcc CXX=/home/jw.li/work/toolchain-arm_cortex-a7+vfp_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/arm-ma-linux-g++ --host=arm-openwrt-linux --prefix=/home/jw.li/work/v50/osssdk/apr  ac_cv_file__dev_zero=yes ac_cv_func_setpgrp_void=yes apr_cv_process_shared_works=yes apr_cv_mutex_robust_shared=yes apr_cv_tcp_nodelay_with_cork=yes ap_void_ptr_lt_long=no 
6 cp -a ../gen_test_char tools/
7 Vim Makefile 
134 行
 OBJECTS_gen_test_char = tools/gen_test_char.lo $(LOCAL_LIBS)
屏蔽
 #OBJECTS_gen_test_char = tools/gen_test_char.lo $(LOCAL_LIBS) 
目的是不生成新的gen_test_char文件
8 vi include/apr_want.h 第93行 #ifndef APR_IOVEC_DEFINED 替换成#if  0
Make
Make install

4 apr-util-1.5.4

./configure CC=/home/jw.li/work/toolchain-arm_cortex-a7+vfp_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/arm-openwrt-linux-gcc CXX=/home/jw.li/work/toolchain-arm_cortex-a7+vfp_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/arm-openwrt-linux-g++ --host=arm-openwrt-linux --prefix=/home/jw.li/work/v50/osssdk/apr-util  --with-apr=/home/jw.li/work/v50/osssdk/apr --with-expat=/home/jw.li/work/v50/osssdk/expat_code/libexpat/expat

4.1.报错

xml/apr_xml.c:35:19: fatal error: expat.h: No such file or directory
 #include <expat.h>

网上PC平台说 是说缺少了 xml 的解析器。查阅网络资料后找到了解决方案，yum 安装一个 expat-devel 包即可。
脸上笑嘻嘻， 来吧让我们开始吧：

–with-expat=DIR 即加上这个参数 所以需要我们交叉编译expat

4.1.1 libexpat的交叉编译

git clone https://github.com/libexpat/libexpat.git
cd expat/
./buildconf.sh 
./configure --prefix=/home/jw.li/work/v50/osssdk/expat --with-docbook  -host=arm-openwrt-linux CC=/home/jw.li/work/toolchain-arm_cortex-a7+vfp_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/arm-openwrt-linux-gcc CXX=/home/jw.li/work/toolchain-arm_cortex-a7+vfp_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/arm-openwrt-linux-g++
automake
make

报错：

ERROR: Configure with –with-docbook for “make dist”.
Makefile:567: recipe for target ‘xmlwf.1’ failed
make[1]: * [xmlwf.1] Error 1

不管 接着make install
发现安装目录下还是生成了想要的文件。

–with-expat=/home/jw.li/work/v50/osssdk/expat expat安装目录加入到apr-util-1.5.4 configure中。

4.2 修改（重要）

修改：

apr-util-1.5.4/xlate/xlate.c的handle_special_names函数，直接关掉本地编码相关的两个判断，直接返回return page; 即：72 75行

  //   return apr_os_default_encoding(pool);
     return page;

来源：http://blog.csdn.net/freeman1975/article/details/53482713

4.3 完整流程

./configure CC=/home/jw.li/work/toolchain-arm_cortex-a7+vfp_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/arm-openwrt-linux-gcc CXX=/home/jw.li/work/toolchain-arm_cortex-a7+vfp_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/arm-ma-linux-g++ --host=arm-openwrt-linux --prefix=/home/jw.li/work/v50/osssdk/apr-util  --with-apr=/home/jw.li/work/v50/osssdk/apr --with-expat=/home/jw.li/work/v50/osssdk/expat_code/libexpat/expat --with-expat=/home/jw.li/work/v50/osssdk/expat 
Make
Make install

5 mxmlv2.10

这个库版本很奇怪，阿里小哥推荐2.80 但是 这个库2.80，2.90之后又变成了2.10 （更新时间上看）
所以用的就是2.10

./configure --prefix=/home/jw.li/work/v50/osssdk/mxml --host=arm-openwrt-linux CC=/home/jw.li/work/toolchain-arm_cortex-a7+vfp_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/arm-openwrt-linux-gcc CXX=/home/jw.li/work/toolchain-arm_cortex-a7+vfp_gcc-4.8-linaro_uClibc-0.9.33.2_eabi/bin/arm-openwrt-linux-g++

报错：

./testmxml: 1: ./testmxml: Syntax error: word unexpected (expecting “)”)
Makefile:352: recipe for target ‘testmxml’ failed
make: * [testmxml] Error 2

报错交叉编译出来肯定不能通过测试 所以我们直接把so和h文件复制走，并建立mxml下面把 include 和lib复制进去 供oss_c_sdk使用即可。

6 oss_c_sdk

6.1下载阿里云oss_c_sdk 源码

git clone https://github.com/aliyun/aliyun-oss-c-sdk.git

6.2准备交叉编译，修改CMakeList.txt文件

CMakeList.txt开头增加

 SET(CMAKE_SYSTEM_NAME Linux)
 SET(TOOLCHAIN_DIR "/home/jw.li/work/toolchain-arm_cortex-a7+vfp_gcc-4.8-linaro_uClibc-0.9.33.2_eabi")
 set(CMAKE_SYSTEM_PROCESSOR MIPS)
 SET(CMAKE_FIND_ROOT_PATH ${TOOLCHAIN_DIR})
 SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
 SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
 SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
 SET(CMAKE_C_COMPILER ${TOOLCHAIN_DIR}/bin/arm-openwrt-linux-gcc)
 SET(CMAKE_CXX_COMPILER ${TOOLCHAIN_DIR}/bin/arm-openwrt-linux-g++)

SET(CMAKE_SYSTEM_NAME Linux) 这句话一定要放到最前面，才会去找交叉编译工具

报错：

CMake Error at CMakeLists.txt:79 (MESSAGE):
Could not find apu-config/apu-1-config

修改CMakeList.txt 将apr 和apr-util bin文件目录加到下面语句中，否则编译cmake不过。

FIND_PROGRAM(APR_CONFIG_BIN NAMES apr-config apr-1-config PATHS /home/jw.li/work/v50/osssdk/apr/bin/ /usr/bin /usr/local/bin /usr/local/apr/bin/)
FIND_PROGRAM(APU_CONFIG_BIN NAMES apu-config apu-1-config PATHS /home/jw.li/work/v50/osssdk/apr-util/bin/ /usr/bin /usr/local/bin /usr/local/apr/bin/)

6.3 cmake 并 make

 cmake . -DCMAKE_INSTALL_PREFIX=/home/jw.li/work/v50/osssdk/oss_c_sdk -DCURL_INCLUDE_DIR=/home/jw.li/work/v50/osssdk/curl/include/ -DCURL_LIBRARY=/home/jw.li/work/v50/osssdk/curl/lib/libcurl.a -DAPR_INCLUDE_DIR=/home/jw.li/work/v50/osssdk/apr/include/apr-1/ -DAPR_LIBRARY=/home/jw.li/work/v50/osssdk/apr/lib/libapr-1.a -DAPR_UTIL_INCLUDE_DIR=/home/jw.li/work/v50/osssdk/apr-util/include/apr-1 -DAPR_UTIL_LIBRARY=/home/jw.li/work/v50/osssdk/apr-util/lib/libaprutil-1.a -DMINIXML_INCLUDE_DIR=/home/jw.li/work/v50/osssdk/mxml/include/ -DMINIXML_LIBRARY=/home/jw.li/work/v50/osssdk/mxml/lib/libmxml.a 
make
make install

7 使用

7.1 依赖顺序： （出现undefined reference to问题解决）

CFLAGS += -I$(INC_DIR)/include 
CFLAGS += -I$(INC_DIR)/oss
CFLAGS += -I$(INC_DIR)/include/oss_c_sdk
CFLAGS += -I$(INC_DIR)/include/curl
CFLAGS += -I$(INC_DIR)/include/mxml
CFLAGS += -I$(INC_DIR)/include/apr-1
CFLAGS += -I$(INC_DIR)/include/apr-util/apr-1

LIBS+= -loss_c_sdk_static
LIBS+= -lcurl
LIBS+= -lapr-1
LIBS+= -lmxml
LIBS+= -laprutil-1

报错：undefined reference to `apr_os_locale_encoding’

即

/home/jw.li/work/v50/osssdk/apr-util-1.5.4/xlate/xlate.c:75: undefined reference to `apr_os_locale_encoding'
/home/jw.li/work/v50/osssdk/apr-util-1.5.4/xlate/xlate.c:75: undefined reference to `apr_os_locale_encoding'
/home/jw.li/work/v50/osssdk/apr-util-1.5.4/xlate/xlate.c:72: undefined reference to `apr_os_default_encoding'
/home/jw.li/work/v50/osssdk/apr-util-1.5.4/xlate/xlate.c:72: undefined reference to `apr_os_default_encoding'

解决方案参见4.2