Missing architecture x86_64 for MediaLibsDemo <p>I am using the following library for connecting to the Red5 server. <a href="https://github.com/slavavdovichenko/MediaLibDemos" rel="nofollow">https://github.com/slavavdovichenko/MediaLibDemos</a>. It gives me the following error. How can I add the missing architecture to the following file? or some other solution?</p> <pre><code>on implementing it, I am getting the following error. ld: warning: ignoring file /private/var/root/Documents/RTMP/RTMP/lib/libav- v9.1965/lib/libavutil.a, missing required architecture x86_64 in file /private/var/root/Documents/RTMP/RTMP/lib/libav-v9.1965/lib/libavutil.a (2 slices) ld: warning: ignoring file /private/var/root/Documents/RTMP/RTMP/lib/libav- v9.1965/lib/libavdevice.a, missing required architecture x86_64 in file /private/var/root/Documents/RTMP/RTMP/lib/libav-v9.1965/lib/libavdevice.a (2 slices) ld: warning: ignoring file /private/var/root/Documents/RTMP/RTMP/lib/libav- v9.1965/lib/libswscale.a, missing required architecture x86_64 in file /private/var/root/Documents/RTMP/RTMP/lib/libav-v9.1965/lib/libswscale.a (2 slices) ld: warning: ignoring file /private/var/root/Documents/RTMP/RTMP/lib/libav- v9.1965/lib/libavformat.a, missing required architecture x86_64 in file /private/var/root/Documents/RTMP/RTMP/lib/libav-v9.1965/lib/libavformat.a (2 slices) ld: warning: ignoring file /private/var/root/Documents/RTMP/RTMP/lib/libav- v9.1965/lib/libavcodec.a, missing required architecture x86_64 in file /private/var/root/Documents/RTMP/RTMP/lib/libav-v9.1965/lib/libavcodec.a (2 slices) ld: warning: ignoring file /private/var/root/Documents/RTMP/RTMP/lib/libav- v9.1965/lib/libavfilter.a, missing required architecture x86_64 in file /private/var/root/Documents/RTMP/RTMP/lib/libav-v9.1965/lib/libavfilter.a (2 slices) ld: warning: ignoring file /var/root/Documents/RTMP/RTMP/lib/MediaLibiOS/MediaLibiOS.a, missing required architecture x86_64 in file /var/root/Documents/RTMP/RTMP/lib/MediaLibiOS/MediaLibiOS.a (3 slices) ld: warning: ignoring file /private/var/root/Documents/RTMP/RTMP/lib/libav- v9.1965/lib/libavresample.a, missing required architecture x86_64 in file /private/var/root/Documents/RTMP/RTMP/lib/libav-v9.1965/lib/libavresample.a (2 slices) ld: warning: ignoring file /var/root/Documents/RTMP/RTMP/lib/CommLibiOS/CommLibiOS.a, missing required architecture x86_64 in file/var/root/Documents/RTMP/RTMP/lib/CommLibiOS/CommLibiOS.a (4 slices) Undefined symbols for architecture x86_64: "_OBJC_CLASS_$_BroadcastStreamClient", referenced from: objc-class-ref in ViewController.o "_OBJC_CLASS_$_RTMPClient", referenced from: objc-class-ref in ViewController.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) </code></pre>