[compiler-rt] [compiler-rt] Remove struct_termio_sz from sanitizer_platform_limits_posix.cpp (PR #137440)

[via llvm-commits]

https://github.com/trcrsired created https://github.com/llvm/llvm-project/pull/137440

Fix #137436 

The `struct termio` and its associated code have been removed from glibc as they are considered obsolete. This change removes the corresponding code in compiler-rt to maintain compatibility. 

Additionally, the check for `struct_termio_sz` specific to Android has been removed. There is no guarantee that the Linux kernel or Google will continue supporting `struct termio`, and its removal aligns with the deprecation in glibc.

Reference: glibc commit e04afb71771710cdc6025fe95908f5f17de7b72d

https://github.com/bminor/glibc/commit/e04afb71771710cdc6025fe95908f5f17de7b72d

>From 24484779287c4493d9a53dd94e0d94ed92250ba4 Mon Sep 17 00:00:00 2001
From: cqwrteur <100043421+trcrsired at users.noreply.github.com>
Date: Sat, 26 Apr 2025 11:16:49 +0800
Subject: [PATCH] [compiler-rt] Remove struct_termio_sz from
 sanitizer_platform_limits_posix.cpp

The `struct termio` and its associated code have been removed from glibc as they are considered obsolete. This change removes the corresponding code in compiler-rt to maintain compatibility.

Additionally, the check for `struct_termio_sz` specific to Android has been removed. There is no guarantee that the Linux kernel or Google will continue supporting `struct termio`, and its removal aligns with the deprecation in glibc.

Reference: glibc commit e04afb71771710cdc6025fe95908f5f17de7b72d

https://github.com/bminor/glibc/commit/e04afb71771710cdc6025fe95908f5f17de7b72d
---
 .../lib/sanitizer_common/sanitizer_platform_limits_posix.cpp   | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp
index b4d87ab6228e5..7a89bf1c74985 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp
@@ -494,9 +494,6 @@ unsigned struct_ElfW_Phdr_sz = sizeof(Elf_Phdr);
   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);