Date: 2025-10-06 02:10:00 +0000
Author: Stephane Fontaine <esselfe16@gmail.com>

Get rid of the 'struct termio' code as glibc is doing.

See https://lists.gnu.org/archive/html/info-gnu/2025-07/msg00011.html for glibc 2.42.

diff -ur a/config/tcl.m4 b/config/tcl.m4
--- a/config/tcl.m4	2024-08-01 04:17:13.000000000 -0400
+++ b/config/tcl.m4	2025-10-05 22:06:17.084652840 -0400
@@ -2210,14 +2210,13 @@
 #	Defines only one of the following vars:
 #		HAVE_SYS_MODEM_H
 #		USE_TERMIOS
-#		USE_TERMIO
 #		USE_SGTTY
 #
 #--------------------------------------------------------------------
 
 AC_DEFUN([SC_SERIAL_PORT], [
     AC_CHECK_HEADERS(sys/modem.h)
-    AC_CACHE_CHECK([termios vs. termio vs. sgtty], tcl_cv_api_serial, [
+    AC_CACHE_CHECK([termios vs. sgtty], tcl_cv_api_serial, [
     AC_TRY_RUN([
 #include <termios.h>
 
@@ -2232,19 +2231,6 @@
 }], tcl_cv_api_serial=termios, tcl_cv_api_serial=no, tcl_cv_api_serial=no)
     if test $tcl_cv_api_serial = no ; then
 	AC_TRY_RUN([
-#include <termio.h>
-
-int main() {
-    struct termio t;
-    if (ioctl(0, TCGETA, &t) == 0) {
-	t.c_cflag |= CBAUD | PARENB | PARODD | CSIZE | CSTOPB;
-	return 0;
-    }
-    return 1;
-}], tcl_cv_api_serial=termio, tcl_cv_api_serial=no, tcl_cv_api_serial=no)
-    fi
-    if test $tcl_cv_api_serial = no ; then
-	AC_TRY_RUN([
 #include <sgtty.h>
 
 int main() {
@@ -2275,21 +2261,6 @@
     fi
     if test $tcl_cv_api_serial = no; then
 	AC_TRY_RUN([
-#include <termio.h>
-#include <errno.h>
-
-int main() {
-    struct termio t;
-    if (ioctl(0, TCGETA, &t) == 0
-	|| errno == ENOTTY || errno == ENXIO || errno == EINVAL) {
-	t.c_cflag |= CBAUD | PARENB | PARODD | CSIZE | CSTOPB;
-	return 0;
-    }
-    return 1;
-    }], tcl_cv_api_serial=termio, tcl_cv_api_serial=no, tcl_cv_api_serial=no)
-    fi
-    if test $tcl_cv_api_serial = no; then
-	AC_TRY_RUN([
 #include <sgtty.h>
 #include <errno.h>
 
@@ -2306,7 +2277,6 @@
     fi])
     case $tcl_cv_api_serial in
 	termios) AC_DEFINE(USE_TERMIOS);;
-	termio)  AC_DEFINE(USE_TERMIO);;
 	sgtty)   AC_DEFINE(USE_SGTTY);;
     esac
 ])
diff -ur a/libphobos/libdruntime/core/sys/posix/sys/ioctl.d b/libphobos/libdruntime/core/sys/posix/sys/ioctl.d
--- a/libphobos/libdruntime/core/sys/posix/sys/ioctl.d	2024-08-01 04:17:18.000000000 -0400
+++ b/libphobos/libdruntime/core/sys/posix/sys/ioctl.d	2025-10-05 22:01:10.401034396 -0400
@@ -131,7 +131,7 @@
 
     enum NCC = 8;
 
-    struct termio
+    /* struct termio
     {
         ushort c_iflag;
         ushort c_oflag;
@@ -139,7 +139,7 @@
         ushort c_lflag;
         ubyte c_line;
         ubyte[NCC] c_cc;
-    }
+    } */
 
     enum TIOCM_LE = 0x001;
     enum TIOCM_DTR = 0x002;
diff -ur a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cpp b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cpp
--- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cpp	2024-08-01 04:17:18.000000000 -0400
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cpp	2025-10-05 22:02:08.211038707 -0400
@@ -479,9 +479,6 @@
   unsigned struct_input_id_sz = sizeof(struct input_id);
   unsigned struct_mtpos_sz = sizeof(struct mtpos);
   unsigned struct_rtentry_sz = sizeof(struct rtentry);
-#if SANITIZER_GLIBC || SANITIZER_ANDROID
-  unsigned struct_termio_sz = sizeof(struct termio);
-#endif
   unsigned struct_vt_consize_sz = sizeof(struct vt_consize);
   unsigned struct_vt_sizes_sz = sizeof(struct vt_sizes);
   unsigned struct_vt_stat_sz = sizeof(struct vt_stat);