Only way I could compile package was to do following modifications in synaser.pas around line 230:
{$IFNDEF BSD}
,(460800, B460800)
{$IFDEF UNIX}
,(500000, $0001005),
(576000, $0001006),
(921600, $0001007),
(1000000, $0001008),
(1152000, $0001009),
(1500000, $000100A),
(2000000, $000100B),
(2500000, $000100C),
(3000000, $000100D),
(3500000, $000100E),
(4000000, $000100F)
{$ENDIF}
{$ENDIF}
Adding constants in termios.inc in cpuarm section is a no go.