libjimtcl fail while seeking for termios.h

[ioamero]

make[2]: Entering directory '/opt/dreamcast-sdk/kos-ports/libjimtcl/build/libjimtcl-1.0.0'
MKLDEXT _load-static-exts.c
CC _load-static-exts.o
CC jim-subcmd.o
CC jim-interactive.o
CC jim-format.o
CC jim.o
UNIDATA _unicode_mapping.c
CC utf8.o
CC jimregexp.o
CC jimiocompat.o
jimiocompat.c: In function ‘Jim_MakeTempFile’:
jimiocompat.c:197:12: warning: unused variable ‘mask’ [-Wunused-variable]
197 | mode_t mask;
| ^~~~
CC linenoise.o
In file included from linenoise.c:120:
/opt/dreamcast-sdk/sh-elf/sh-elf/include/termios.h:4:10: fatal error: sys/termios.h: No such file or directory
4 | #include <sys/termios.h>
| ^~~~~~~~~~~~~~~
compilation terminated.