$ ./configure --with-sdl --disable-network
...
[SRC] Compiling waypoint_cmd.cpp
[SRC] Compiling waypoint_gui.cpp
[SRC] Compiling widget.cpp
[SRC] Compiling widgets/dropdown.cpp
[SRC] Compiling window.cpp
/home/nik/src/OpenTTD/src/window.cpp: In function ‘void UpdateWindows()’:
/home/nik/src/OpenTTD/src/window.cpp:3106:3: error: ‘NetworkChatMessageLoop’ was not declared in this scope                                                              
   NetworkChatMessageLoop();
   ^~~~~~~~~~~~~~~~~~~~~~
/home/nik/src/OpenTTD/src/window.cpp:3106:3: note: suggested alternative: ‘NetworkDrawChatMessage’                                                                       
   NetworkChatMessageLoop();
   ^~~~~~~~~~~~~~~~~~~~~~
   NetworkDrawChatMessage
make[1]: *** [Makefile:227: window.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: Leaving directory '/home/nik/src/OpenTTD/objs/release'
make: *** [Makefile:56: all] Error 1
(nik@alfalfa) :( 2 (16:38)