tcgetaddr() and friends are in termios.h
--- a/src/bt.c	2024-04-04 14:23:09.000000000 +0200
+++ b/src/bt.c	2024-05-09 18:36:02.108344059 +0200
@@ -38,11 +38,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if defined(__linux__) && !defined(NO_TCGETS2)
-#include <asm/termbits.h>
-#else
 #include <termios.h>
-#endif
 #include <time.h>
 #include <unistd.h>
 #if defined(__FreeBSD__)