https://salsa.debian.org/minicom-team/minicom/-/issues/17
https://bugs.gentoo.org/969713
https://salsa.debian.org/minicom-team/minicom/-/commit/964ae563cb5a78545ae1a4a3b6784c69ec73bc48

From 964ae563cb5a78545ae1a4a3b6784c69ec73bc48 Mon Sep 17 00:00:00 2001
From: Stefan Becker <chemobejk@gmail.com>
Date: Mon, 17 Nov 2025 11:57:32 +0200
Subject: [PATCH] src/sysdep.h: remove cfset{i,o}speed macros for glibc

glibc 2.42 added support for arbitrary termios speeds on Linux, i.e.
speed_t and Bxxx defines changed from bitmasks to unsigned integers:
Therefore speed_t can no longer be used together with c_flag's internal
bitmask CBAUD.

When minicom is compiled on such a system the baudrate setting is broken
and the user experiences garbled UART output.

Remove the macros for glibc, i.e. call cfset{i,o}speed() instead.

Fixes #17
---
 src/sysdep.h | 9 ---------
 2 files changed, 1 insertion(+), 9 deletions(-)

diff --git a/src/sysdep.h b/src/sysdep.h
index b11945c..9ba8836 100644
--- a/src/sysdep.h
+++ b/src/sysdep.h
@@ -139,12 +139,3 @@
 #  define cfsetospeed(tty, spd)
 #endif
 #endif
-
-/* Redefine cfset{i,o}speed for Linux > 1.1.68 && libc < 4.5.21 */
-#if defined (__GLIBC__) && defined(CBAUDEX)
-#  undef cfsetispeed
-#  undef cfsetospeed
-#  define cfsetispeed(xtty, xspd) \
-		((xtty)->c_cflag = ((xtty)->c_cflag & ~CBAUD) | (xspd))
-#  define cfsetospeed(tty, spd)
-#endif
-- 
GitLab