# Error building mediasoup-broadcaster-demo \[solved\] **URL:** \ **Category:** mediasoup-demo\ **Created:** [September 3, 2020, 4:04pm UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699 "2020-09-03T16:04:46Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![manang](https://avatars.discourse-cdn.com/v4/letter/m/49beb7/32.png) [@manang](https://mediasoup.discourse.group/u/manang)\ **Post date:** [September 3, 2020, 4:04pm UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/1 "2020-09-03T16:04:46Z")
I’m, I’m trying to build mediasoup-broadcaster-demo, I launched the following command: cmake . -Bbuild -DLIBWEBRTC\_INCLUDE\_PATH:PATH=/home/foo/src/webrtc-checkout/src -DLIBWEBRTC\_BINARY\_PATH:PATH=/home/foo/src/webrtc-checkout/src/out/m84/obj -DCMAKE\_USE\_OPENSSL=ON -DOPENSSL\_INCLUDE\_DIR:PATH=/usr/include/ and make -C build but after 1 second I obtain ```auto make: Entering directory '/home/manangel/mediasoup-broadcaster-demo/build' make[1]: Entering directory '/home/manangel/mediasoup-broadcaster-demo/build' make[2]: Entering directory '/home/manangel/mediasoup-broadcaster-demo/build' make[2]: Leaving directory '/home/manangel/mediasoup-broadcaster-demo/build' make[2]: Entering directory '/home/manangel/mediasoup-broadcaster-demo/build' [0%] Building CXX object libwebrtc/CMakeFiles/webrtc_broadcaster.dir/api/test/create_frame_generator.cc.o In file included from /home/manangel/mediasoup-broadcaster-demo/deps/libwebrtc/api/test/create_frame_generator.cc:11: /home/manangel/mediasoup-broadcaster-demo/deps/libwebrtc/api/test/create_frame_generator.h:18:10: fatal error: absl/types/optional.h: No such file or directory 18 | #include "absl/types/optional.h" | ^ ~~~~~~~~~~~~~~~~~~~~~~ compilation terminated. make[2]: *** [libwebrtc/CMakeFiles/webrtc_broadcaster.dir/build.make:63: libwebrtc/CMakeFiles/webrtc_broadcaster.dir/api/test/create_frame_generator.cc.o] Error 1 make[2]: Leaving directory '/home/manangel/mediasoup-broadcaster-demo/build' make[1]: *** [CMakeFiles/Makefile2:1379: libwebrtc/CMakeFiles/webrtc_broadcaster.dir/all] Error 2 make[1]: Leaving directory '/home/manangel/mediasoup-broadcaster-demo/build' make: *** [Makefile:130: all] Error 2 make: Leaving directory '/home/manangel/mediasoup-broadcaster-demo/build' manangel@chromium:~/mediasoup-broadcaster-demo$ ``` what am I doing wrong? Thanks Angelo ---
**Author:** ![jmillan](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/jmillan/32/9_2.png) [@jmillan](https://mediasoup.discourse.group/u/jmillan)\ **Post date:** [September 3, 2020, 5:20pm UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/2 "2020-09-03T17:20:52Z")
Make sure you’re using the correct libwebrtc version. ---
**Author:** ![manang](https://avatars.discourse-cdn.com/v4/letter/m/49beb7/32.png) [@manang](https://mediasoup.discourse.group/u/manang)\ **Post date:** [September 3, 2020, 6:38pm UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/3 "2020-09-03T18:38:45Z")
I’m following this guide about libwebrtc > **[mediasoup :: Installation](https://mediasoup.org/documentation/v3/libmediasoupclient/installation/)** > > Cutting Edge WebRTC Video Conferencing is it correct? ---
**Author:** ![jmillan](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/jmillan/32/9_2.png) [@jmillan](https://mediasoup.discourse.group/u/jmillan)\ **Post date:** [September 4, 2020, 8:42am UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/4 "2020-09-04T08:42:41Z")
That’s the installation guide. You need to use branch-heads/4147 ---
**Author:** ![manang](https://avatars.discourse-cdn.com/v4/letter/m/49beb7/32.png) [@manang](https://mediasoup.discourse.group/u/manang)\ **Post date:** [September 4, 2020, 8:53am UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/5 "2020-09-04T08:53:10Z")
I’ve used branch-heads/4147 I copied the installation of libwebrtc to be sure that I’m using the right version. Other ideas? thanks ---
**Author:** ![manang](https://avatars.discourse-cdn.com/v4/letter/m/49beb7/32.png) [@manang](https://mediasoup.discourse.group/u/manang)\ **Post date:** [September 4, 2020, 9:15am UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/6 "2020-09-04T09:15:21Z")
> [@manang](#): > > mediasoup-broadcaster-demo I found the error, I linked the wrong webrtc folder. Angelo ---
**Author:** ![manang](https://avatars.discourse-cdn.com/v4/letter/m/49beb7/32.png) [@manang](https://mediasoup.discourse.group/u/manang)\ **Post date:** [September 4, 2020, 9:17am UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/7 "2020-09-04T09:17:02Z")
I have, now this error: ```auto [81%] Building CXX object libmediasoupclient/CMakeFiles/mediasoupclient.dir/src/Logger.cpp.o In file included from /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/src/Logger.cpp:3: /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/include/Logger.hpp:55:8: warning: elaborated-type-specifier for a scoped enum must not use the ‘class’ keyword 55 | enum class LogLevel : uint8_t | ~~~~^~~~~ | ----- /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/include/Logger.hpp:55:14: error: use of enum ‘LogLevel’ without previous declaration 55 | enum class LogLevel : uint8_t | ^ ~~~~~~~ /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/include/Logger.hpp:55:25: error: ‘uint8_t’ was not declared in this scope; did you mean ‘u_int8_t’? 55 | enum class LogLevel : uint8_t | ^ ~~~~~~ | u_int8_t /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/include/Logger.hpp:56:3: error: default member initializer for unnamed bit-field 56 | { | ^ /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/include/Logger.hpp:67:23: error: ‘LogLevel’ has not been declared 67 | virtual void OnLog(LogLevel level, char* payload, size_t len) = 0; | ^ ~~~~~~~ /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/include/Logger.hpp:72:15: error: ‘LogLevel’ has not been declared 72 | void OnLog(LogLevel level, char* payload, size_t len) override; | ^ ~~~~~~~ /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/include/Logger.hpp:75:27: error: ‘LogLevel’ has not been declared 75 | static void SetLogLevel(LogLevel level); | ^ ~~~~~~~ /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/include/Logger.hpp:80:10: error: ‘LogLevel’ does not name a type 80 | static LogLevel logLevel; | ^ ~~~~~~~ /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/src/Logger.cpp:12:10: error: ‘LogLevel’ in ‘class mediasoupclient::Logger’ does not name a type 12 | Logger::LogLevel Logger::logLevel = Logger::LogLevel::LOG_NONE; | ^ ~~~~~~~ /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/src/Logger.cpp:16:35: error: variable or field ‘SetLogLevel’ declared void 16 | void Logger::SetLogLevel(Logger::LogLevel level) | ^ ~~~~~~~ /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/src/Logger.cpp:16:35: error: ‘LogLevel’ is not a member of ‘mediasoupclient::Logger’ /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/src/Logger.cpp:33:40: error: variable or field ‘OnLog’ declared void 33 | void Logger::DefaultLogHandler::OnLog(LogLevel /*level*/, char* payload, size_t /*len*/) | ^ ~~~~~~~ /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/src/Logger.cpp:33:40: error: ‘LogLevel’ was not declared in this scope /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/src/Logger.cpp:33:60: error: expected primary-expression before ‘char’ 33 | void Logger::DefaultLogHandler::OnLog(LogLevel /*level*/, char* payload, size_t /*len*/) | ^~~~ /home/manangel/mediasoup-broadcaster-demo/deps/libmediasoupclient/src/Logger.cpp:33:89: error: expected primary-expression before ‘)’ token 33 | dler::OnLog(LogLevel /*level*/, char* payload, size_t /*len*/) | ^ make[2]: *** [libmediasoupclient/CMakeFiles/mediasoupclient.dir/build.make:128: libmediasoupclient/CMakeFiles/mediasoupclient.dir/src/Logger.cpp.o] Error 1 make[2]: Leaving directory '/home/manangel/mediasoup-broadcaster-demo/build' make[1]: *** [CMakeFiles/Makefile2:1271: libmediasoupclient/CMakeFiles/mediasoupclient.dir/all] Error 2 make[1]: Leaving directory '/home/manangel/mediasoup-broadcaster-demo/build' make: *** [Makefile:130: all] Error 2 make: Leaving directory '/home/manangel/mediasoup-broadcaster-demo/build' ``` do you know why? Thanks ---
**Author:** ![jmillan](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/jmillan/32/9_2.png) [@jmillan](https://mediasoup.discourse.group/u/jmillan)\ **Post date:** [September 4, 2020, 9:27am UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/8 "2020-09-04T09:27:19Z")
Are you using the last mediasoup-broadcaster-demo version? That problem was fixed some time ago. ---
**Author:** ![manang](https://avatars.discourse-cdn.com/v4/letter/m/49beb7/32.png) [@manang](https://mediasoup.discourse.group/u/manang)\ **Post date:** [September 4, 2020, 9:32am UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/9 "2020-09-04T09:32:14Z")
the V3 branch, is it ok? ---
**Author:** ![jmillan](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/jmillan/32/9_2.png) [@jmillan](https://mediasoup.discourse.group/u/jmillan)\ **Post date:** [September 4, 2020, 9:57am UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/10 "2020-09-04T09:57:44Z")
This exact commit fixes that issue: [https://github.com/versatica/mediasoup-broadcaster-demo/commit/17e026e11defbc8db3c901c85ef0457fe3ad2863](https://github.com/versatica/mediasoup-broadcaster-demo/commit/17e026e11defbc8db3c901c85ef0457fe3ad2863) I can’t say why it may be failing four you. ---
**Author:** ![manang](https://avatars.discourse-cdn.com/v4/letter/m/49beb7/32.png) [@manang](https://mediasoup.discourse.group/u/manang)\ **Post date:** [September 4, 2020, 10:04am UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/11 "2020-09-04T10:04:18Z")
with this commit i have this error: ```auto [81%] Linking CXX executable broadcaster /usr/bin/ld: /home/manangel/webrtc-checkout/src/out/m84/obj/libwebrtc.a(latebindingsymboltable_linux.o): undefined reference to symbol 'dlclose@@GLIBC_2.2.5' /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/libdl.so: error adding symbols: DSO missing from command line collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/broadcaster.dir/build.make:123: broadcaster] Error 1 make[2]: Leaving directory '/home/manangel/mediasoup-broadcaster-demo/build/build' make[1]: *** [CMakeFiles/Makefile2:455: CMakeFiles/broadcaster.dir/all] Error 2 make[1]: Leaving directory '/home/manangel/mediasoup-broadcaster-demo/build/build' make: *** [Makefile:130: all] Error 2 make: Leaving directory '/home/manangel/mediasoup-broadcaster-demo/build/build' ``` thanks for your help! ---
**Author:** ![manang](https://avatars.discourse-cdn.com/v4/letter/m/49beb7/32.png) [@manang](https://mediasoup.discourse.group/u/manang)\ **Post date:** [September 4, 2020, 10:55am UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/13 "2020-09-04T10:55:23Z")
Changing uint8\_t to u\_int8\_t I obtain the error about ```auto undefined reference to symbol 'dlclose@@GLIBC_2.2.5' ``` Do I need to use a cmake flag? Thanks ---
**Author:** ![jmillan](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/jmillan/32/9_2.png) [@jmillan](https://mediasoup.discourse.group/u/jmillan)\ **Post date:** [September 4, 2020, 11:57am UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/14 "2020-09-04T11:57:45Z")
Please look at the forum for that very exact error ---
**Author:** ![manang](https://avatars.discourse-cdn.com/v4/letter/m/49beb7/32.png) [@manang](https://mediasoup.discourse.group/u/manang)\ **Post date:** [September 4, 2020, 12:30pm UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/15 "2020-09-04T12:30:15Z")
I compiled the demo, Now I’m trying to execute it: SERVER\_URL=https://localhost:3000 ROOM\_ID=broadcaster VERIFY\_SSL=false build/broadcaster [DEBUG] mediasoupclient::Initialize() | mediasoupclient v3.0.8 [INFO] welcome to mediasoup broadcaster app! [INFO] verifying that room ‘broadcaster’ exists… [ERROR] unable to retrieve room info [status code:404, body:" Error ``` Cannot GET /rooms/broadcaster ``` "] Where do I commit the error? thanks ---
**Author:** ![ibc](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/ibc/32/1540_2.png) [@ibc](https://mediasoup.discourse.group/u/ibc)\ **Post date:** [September 4, 2020, 12:57pm UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/16 "2020-09-04T12:57:29Z")
At some time you should start reading the code of the demo server to understand how it works instead of asking immediately. ---
**Author:** ![manang](https://avatars.discourse-cdn.com/v4/letter/m/49beb7/32.png) [@manang](https://mediasoup.discourse.group/u/manang)\ **Post date:** [September 4, 2020, 1:11pm UTC](https://mediasoup.discourse.group/t/error-building-mediasoup-broadcaster-demo-solved/1699/17 "2020-09-04T13:11:09Z")
ok, i found the error, that is the port. Thank you for your help Angelo