command.c: In function 'inp_text':
command.c:2560: warning: pointer targets in passing argument 1 of 'tt_write' differ in signedness
command.c: In function 'init_command':
command.c:3005: error: invalid lvalue in assignment
command.c:3007: error: invalid lvalue in assignment
command.c: In function 'main_loop':
command.c:3472: warning: pointer targets in passing argument 1 of 'safe_print_string' differ in signedness
make[2]: *** [command.lo] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all-recursive-am] Error 2

You can solve this by running a command before make:

 sed -i 's/AT_LEAST((int) num_fds,/AT_LEAST( num_fds,/' src/command.c