继上一篇文章后，中途被其他事情耽误两周，现在继续。。。

编译第三方库：

一、【君正平台：编译usrsctp】

1、下载源码

git clone https://github.com/sctplab/usrsctp.git

2、编译

我们进入目录建一个Build/T31X/目录，并进入该目录，将编译链toolchain拷贝在该目录下

执行：

cmake -DCMAKE_TOOLCHAIN_FILE=./toolchain/cross-mips-linux-uclibc-gnu.cmake ../..

看到配置信息如下：

-- The C compiler identification is GNU 4.7.2
-- Check for working C compiler: /opt/ISVP/mips-gcc472-glibc216-64bit/bin/mips-linux-uclibc-gnu-gcc
-- Check for working C compiler: /opt/ISVP/mips-gcc472-glibc216-64bit/bin/mips-linux-uclibc-gnu-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- No build type selected, using DEBUG
-- Looking for include file sys/queue.h
-- Looking for include file sys/queue.h - found
-- Looking for include files sys/socket.h, linux/if_addr.h
-- Looking for include files sys/socket.h, linux/if_addr.h - found
-- Looking for include files sys/socket.h, linux/rtnetlink.h
-- Looking for include files sys/socket.h, linux/rtnetlink.h - found
-- Looking for 4 include files sys/types.h, ..., netinet/ip_icmp.h
-- Looking for 4 include files sys/types.h, ..., netinet/ip_icmp.h - found
-- Looking for include file stdatomic.h
-- Looking for include file stdatomic.h - not found
-- Looking for usrsctp.h
-- Looking for usrsctp.h - found
-- Performing Test have_sa_len
-- Performing Test have_sa_len - Failed
-- Performing Test have_sin_len
-- Performing Test have_sin_len - Failed
-- Performing Test have_sin6_len
-- Performing Test have_sin6_len - Failed
-- Performing Test have_sconn_len
-- Performing Test have_sconn_len - Failed
-- Performing Test has_wfloat_equal
-- Performing Test has_wfloat_equal - Success
-- Performing Test has_wshadow
-- Performing Test has_wshadow - Success
-- Performing Test has_wpointer_aritih
-- Performing Test has_wpointer_aritih - Success
-- Performing Test has_wunreachable_code
-- Performing Test has_wunreachable_code - Success
-- Performing Test has_winit_self
-- Performing Test has_winit_self - Success
-- Performing Test has_wno_unused_function
-- Performing Test has_wno_unused_function - Success
-- Performing Test has_wno_unused_parameter
-- Performing Test has_wno_unused_parameter - Success
-- Performing Test has_wno_unreachable_code
-- Performing Test has_wno_unreachable_code - Success
-- Performing Test has_wstrict_prototypes
-- Performing Test has_wstrict_prototypes - Success
-- Compiler flags (CMAKE_C_FLAGS): -Wall -fPIC -Wl,-Bsymbolic -lm -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS -std=c99 -pedantic -Wall -Wextra -Wfloat-equal -Wshadow -Wpointer-arith -Wunreachable-code -Winit-self -Wno-unused-function -Wno-unused-parameter -Wno-unreachable-code -Wstrict-prototypes -Werror
-- Performing Test has_wno_address_of_packed_member
-- Performing Test has_wno_address_of_packed_member - Success
-- Performing Test has_wno_deprecated_declarations
-- Performing Test has_wno_deprecated_declarations - Success
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE  
-- Configuring done
-- Generating done
-- Build files have been written to: /home/heyan/third_lib/webrtc/usrsctp/Build/T31X

之后我们执行 make

遇到如下的错误：

解决办法：

我们将usrsctp下的CMakeLists.txt中编译参数-Werror，修改为-Wno-error 

继续编译，编译成功；

之后我们可以打开 usrsctp/Build/T31X/cmake_install.cmake 查看CMAKE_INSTALL_PREFIX，可以修改该CMAKE_INSTALL_PREFIX；

注：如果对Cmake不熟悉，我么可以按照如上操作，但是可以采用如下方式，解决以上问题：

编译的指令修改为：

cmake -DCMAKE_TOOLCHAIN_FILE=./toolchain/cross-mips-linux-uclibc-gnu.cmake -DCMAKE_INSTALL_PREFIX=../../Bin/T31X -Dsctp_werror=0  ../..

3、编译生成的内容

二、【君正平台：编译libwebsockets】

1、下载源码

git clone https://github.com/warmcat/libwebsockets.git

2、进入libwebsockets

新建Build/T31X 目录

新建Library/T31X目录

将libwebsocket依赖的openssl和libevent的头文件和库都放在Library/T31X，如下：

将toolchain 放在Build/T31X 的目录中，并在该目录中执行如下脚本（ ShellScript.sh）：

#!/bin/bash
rm -rf CMakeCache.txt
rm -r CMakeFiles
rm -rf cmake_install.cmake
rm -rf Makefile
rm -rf CTestTestfile.cmake

if [[ "$@" =~ "-d" ]];then

        echo "----------------------------cmake debug----------------------------"
        cmake -DCMAKE_BUILD_TYPE=Debug \
        -DCMAKE_TOOLCHAIN_FILE=./toolchain/cross-mips-linux-uclibc-gnu.cmake \
        -DLWS_WITHOUT_SERVER=ON \
        -DLWS_WITHOUT_TESTAPPS=ON \
        -DLWS_WITH_ZLIB=OFF \
        -DLWS_WITHOUT_EXTENSIONS=ON \
        -DLWS_WITH_ZIP_FOPS=OFF \
        -DLWS_MAX_SMP=1 \
        -DLWS_WITH_LIBEVENT=ON -DLWS_LIBEVENT_INCLUDE_DIRS="../../Library/T31X/include/libevent/" -DLWS_LIBEVENT_LIBRARIES="../../Library/T31X/lib/libevent.so " \
        -DLWS_WITH_SSL=ON -DLWS_OPENSSL_INCLUDE_DIRS="../../Library/T31X/include" -DLWS_OPENSSL_LIBRARIES="../../Library/T31X/lib/libssl.so;../../Library/T31X/lib/libcrypto.so" \
        ../..   
else      
        echo "----------------------------cmake release----------------------------"
        cmake -DCMAKE_BUILD_TYPE=Release \
        -DDEBUG=ON -DCMAKE_TOOLCHAIN_FILE=./toolchain/cross-mips-linux-uclibc-gnu.cmake \
        -DLWS_WITHOUT_SERVER=ON \
        -DLWS_WITHOUT_TESTAPPS=ON \
        -DLWS_WITH_ZLIB=OFF \
        -DLWS_WITHOUT_EXTENSIONS=ON \
        -DLWS_WITH_ZIP_FOPS=OFF \
        -DLWS_MAX_SMP=1 \
        -DLWS_HAVE_HMAC_CTX_new=1 \
        -DLWS_HAVE_EVP_MD_CTX_free=1\
        -DLWS_WITH_LIBEVENT=ON -DLIBEVENT_INCLUDE_DIRS="../../Library/T31X/include/libevent/" -DLIBEVENT_LIBRARIES="../../Library/T31X/lib/libevent.so " \
        -DLWS_WITH_SSL=ON -DOPENSSL_INCLUDE_DIR="../../Library/T31X/include" -DLWS_OPENSSL_LIBRARIES="../../Library/T31X/lib/libssl.so;../../Library/ISVP/lib/libcrypto.so" -DOPENSSL_CRYPTO_LIBRARY="../../Library/T31X/lib/libcrypto.so" -DOPENSSL_SSL_LIBRARY="../../Library/T31X/lib/libssl.so" \
        ../..   
fi

make

错误如下

解决办法：同样我们将CMakeLists.txt中的-Werror修改，或者定义DISABLE_WERROR；

【补充：】因为在后面遇到一个执行错误，详见问题描述，修改一下编译脚本，增加一个定义

3、编译成功生成如下：

在这个时候就成功了一半了，离目标越来越近，加油，，，接下来我们需要编译KVS相关的库，详细内容见下页（点击）；