libmediasoup 编译

cmake . -Bbuild -DLIBWEBRTC_INCLUDE_PATH:PATH=/home/yq/share/src/mediasoup/client/libwebrtc/src  -DLIBWEBRTC_BINARY_PATH:PATH=/home/yq/share/src/mediasoup/client/libwebrtc/src/out/mybuild-m79/obj -DMEDIASOUPCLIENT_BUILD_TESTS=no -DMEDIASOUPCLIENT_LOG_DEV=true -DMEDIASOUPCLIENT_LOG_TRACE=true

编译成功后的结果:

find . -name "*.a"

./build/libsdptransform/libsdptransform.a

./build/libmediasoupclient.a

问题:

/home/yq/share/src/mediasoup/client/libmediasoupclient/src/ortc.cpp:891:69: error: use of deleted function ‘bool std::regex_match(const std::__cxx11::basic_string<_Ch_type, _Ch_traits, _Ch_alloc>&&, std::__cxx11::match_results::const_iterator, _Alloc>&, const std::__cxx11::basic_regex<_Ch_type, _Rx_traits>&, std::regex_constants::match_flag_type) [with _Ch_traits = std::char_traits; _Ch_alloc = std::allocator; _Alloc = std::allocator > > >; _Ch_type = char; _Rx_traits = std::__cxx11::regex_traits; typename std::__cxx11::basic_string<_Ch_type, _Ch_traits, _Ch_alloc>::const_iterator = __gnu_cxx::__normal_iterator >]’

    std::regex_match(roleIt->get(), roleMatch, RoleRegex);

                                                                    ^

解决:

https://mlog.club/article/184431

cmake . -Bbuild  -DLIBWEBRTC_INCLUDE_PATH:PATH="/home/yq/share/src/mediasoup/client/libwebrtc/src"  -DLIBWEBRTC_BINARY_PATH:PATH="/home/yq/share/src/mediasoup/client/libwebrtc/src/out/mybuild-m79/obj"  -DOPENSSL_INCLUDE_DIR:PATH="/usr/local/include"  -DCMAKE_USE_OPENSSL=ON

编译注意事项:

      cpr 里边有个libcurl.so 需要依赖openssl 相关的库,  libwebrtc.a 也有同样的依赖,  所以在编译libcurl.so 时依赖的openssl 相关的库和头文件必须是 libwebrtc.a 所依赖的头文件和库;

依赖的库有 libssl.a libcrypto.a;

路径为: 

openssl 头文件路径为:

src/build/linux/debian_sid_amd64-sysroot/usr/include/openssl

另外需要注意的是x86_64平台的相关配置需要copy到openssl头文件里边: 

cp src/build/linux/debian_sid_amd64-sysroot/usr/include/x86_64-linux-gnu/openssl/*   

src/build/linux/debian_sid_amd64-sysroot/usr/include/openssl

以上的cmake 选项只指定了头文件路径, 没有指定库的路径,  所以需要把webrtc中的相关库复制到系统路径:

cd webrtc:

sudo cp ./src/build/linux/debian_sid_amd64-sysroot/usr/lib/x86_64-linux-gnu/libssl.a /usr/local/lib/

sudo cp ./src/build/linux/debian_sid_amd64-sysroot/usr/lib/x86_64-linux-gnu/libcrypto.a /usr/local/lib/

sudo rm /usr/local/include/openssl -r

sudo cp ./src/build/linux/debian_sid_amd64-sysroot/usr/include/openssl /usr/local/include/openssl -r

把x86_64 openssl 的配置头文件copy过去:

sudo  cp ./src/build/linux/debian_sid_amd64-sysroot/usr/include/x86_64-linux-gnu/openssl/* /usr/local/include/openssl/

make -C build

问题:

[  0%] Linking C shared library ../../../../lib/libcurl.so

/usr/bin/ld: /usr/local/lib/libssl.a(s3_clnt.o): relocation R_X86_64_PC32 against symbol `ssl3_get_server_hello' can not be used when making a shared object; recompile with -fPIC

/usr/bin/ld: 最后的链结失败: 错误的值

解决:

      需要把/usr/local/lib/libssl.a 替换为webrtc 目录下的libssl.a

      所在目录:  src/build/linux/debian_sid_amd64-sysroot/usr/lib/x86_64-linux-gnu/libssl.a

问题:

/home/yq/share/src/mediasoup/demo/mediasoup-broadcaster-demo/deps/libmediasoupclient/include/Logger.hpp:55:25: error: ‘uint8_t’ was not declared in this scope

解决:

https://stackoverflow.com/questions/1971062/error-uint8-t-has-not-been-declared

问题:

/home/yq/share/src/mediasoup/demo/mediasoup-broadcaster-demo/deps/libmediasoupclient/src/ortc.cpp: In function ‘void mediasoupclient::ortc::validateRtpCodecCapability(json&)’:

/home/yq/share/src/mediasoup/demo/mediasoup-broadcaster-demo/deps/libmediasoupclient/src/ortc.cpp:106:81: error: use of deleted function ‘bool std::regex_match(const std::__cxx11::basic_string<_Ch_type, _Ch_traits, _Ch_alloc>&&, std::__cxx11::match_results::const_iterator, _Alloc>&, const std::__cxx11::basic_regex<_Ch_type, _Rx_traits>&, std::regex_constants::match_flag_type) [with _Ch_traits = std::char_traits; _Ch_alloc = std::allocator; _Alloc = std::allocator > > >; _Ch_type = char; _Rx_traits = std::__cxx11::regex_traits; typename std::__cxx11::basic_string<_Ch_type, _Ch_traits, _Ch_alloc>::const_iterator = __gnu_cxx::__normal_iterator >]’

    std::regex_match(mimeTypeIt->get(), mimeTypeMatch, MimeTypeRegex);

                                                                                ^

In file included from /usr/include/c++/7/regex:62:0,

                from /home/yq/share/src/mediasoup/demo/mediasoup-broadcaster-demo/deps/libmediasoupclient/src/ortc.cpp:8:

/usr/include/c++/7/bits/regex.h:2121:5: note: declared here

    regex_match(const basic_string<_Ch_type, _Ch_traits, _Ch_alloc>&&,

解决:

https://stackoverflow.com/questions/32164501/error-use-of-deleted-function-bool-regex-match-with-gcc-5-2-0

问题:

[ 77%] Linking CXX executable broadcaster

/usr/bin/ld: broadcaster: hidden symbol `SSLeay' in /home/yq/share/src/mediasoup/client/libwebrtc/src/out/mybuild-m79/obj/libwebrtc.a(crypto.o) is referenced by DSO

/usr/bin/ld: final link failed: Bad value

原因:

      SSLeay  在特定的ssl 版本中才有的函数,  经过对比发现,  openssl 头文件和库的版本不一致;

解决:

      该工程所依赖的openssl 的头文件和库文件都需要依赖 webrtc 项目中的 openssl项目;  具体依赖的库为 libcrypto.a  libssl.a;    头文件也在webrtc 里边有相关路径;    里边有32位版本和64位版本,  需要用到与编译系统一样的版本即可!