Comment 48 for bug 1817395

Sorry, I got some more build errors.

g++ -o lin64_build/mixxx -Wl,-rpath,/usr/lib/x86_64-linux-gnu -L/usr/lib/x86_64-linux-gnu -pthread -Wl,-rpath=/usr/lib/x86_64-linux-gnu lin64_build/res/qrc_mixxx.o lin64_build/src/main.o -Llin64_build/lib/soundtouch -Llib/soundtouch -Llin64_build/lib/libshout lin64_build/libmixxx.a -lX11 -lportaudio -lasound -lm -lporttime -lportmidi -lQt5X11Extras -lQt5Concurrent -lQt5Network -lQt5OpenGL -lQt5Script -lQt5ScriptTools -lQt5Sql -lQt5Svg -lQt5Test -lQt5Widgets -lQt5Gui -lQt5Xml -lQt5DBus -lQt5Core -lsndfile -lFLAC -lvorbisfile -lvorbis -logg -lvorbisenc -lGL -lGLU -ltag -lprotobuf-lite -lchromaprint -lrubberband -lmp3lame -lmad -lid3tag -lpthread -lrt -lusb-1.0 -lusb-1.0 -lopusfile -lopus -lsqlite3 -llilv-0 -lupower-glib -lgobject-2.0 -lglib-2.0 -lsoundtouch -lshout_mixxx -logg -lvorbis -ltheora -lspeex -l:libssl.so.1.0.0 -l:libcrypto.so.1.0.0
lin64_build/lib/libshout/libshout_mixxx.a(tls.o): In function `tls_setup_process':
/home/tez/mixxx/lib/libshout/src/tls.c:200: undefined reference to `SSL_is_init_finished'
/home/tez/mixxx/lib/libshout/src/tls.c:203: undefined reference to `SSL_is_init_finished'
lin64_build/lib/libshout/libshout_mixxx.a(tls.o): In function `tls_setup':
/home/tez/mixxx/lib/libshout/src/tls.c:66: undefined reference to `OPENSSL_init_ssl'
/home/tez/mixxx/lib/libshout/src/tls.c:67: undefined reference to `OPENSSL_init_ssl'
/home/tez/mixxx/lib/libshout/src/tls.c:68: undefined reference to `SSLeay_add_all_algorithms'
/home/tez/mixxx/lib/libshout/src/tls.c:69: undefined reference to `OPENSSL_init_ssl'
collect2: error: ld returned 1 exit status
scons: *** [lin64_build/mixxx] Error 1
scons: building terminated because of errors.

While it was building I did some web searches for:
undefined reference to SSLeay_add_all_algorithms

I found these pages:

https://github.com/openwrt/packages/blob/master/libs/libshout/patches/150-openssl-1.1.patch

The API has changed between 1.0.0 and 1.1.0 of libssl

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=228942

https://<email address hidden>/msg1094286.html

"s_server.c:291:2: warning: implicit declaration of function
'SSLeay_add_all_algorithms' is invalid in C99 [-Wimplicit-function-declaration]
        apps_startup();
        ^
./apps.h:124:43: note: expanded from macro 'apps_startup'
# define apps_startup() do_pipe_sig(); SSLeay_add_all_algorithms();
                                               ^
s_server.c:407:11: warning: implicit declaration of function
'SSLv2_server_method' is invalid in C99 [-Wimplicit-function-declaration]"

Was change of compiler or build options after Ubuntu 16.04?