From: Pavel Sobolev <contact@paveloom.dev>
Subject: [PATCH] Fix issues caused by build system updates.

This includes fixes for issues caused by the following updates:

- GCC 15 (specifically, changes in libstdc++)
- GNU libc C library 2.42

Specifically, the following is changed:

- Added missing includes of the `<cstdint>` header [1]
- Removed deprecated `struct termio` [2]
- Removed a redundant include of the `<math.h>` header [3]

[1] See https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=3a817a4a5a6d94da9127af3be9f84a74e3076ee2
[2] See https://github.com/swiftlang/llvm-project/commit/59978b21ad9c65276ee8e14f26759691b8a65763
[3] See https://github.com/swiftlang/swift/issues/81774

Bug: https://bugs.gentoo.org/945025

Signed-off-by: Pavel Sobolev <contact@paveloom.dev>

--- a/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_ioctl.inc
+++ b/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_ioctl.inc
@@ -338,17 +338,9 @@ static void ioctl_table_fill() {
   _(SOUND_PCM_WRITE_CHANNELS, WRITE, sizeof(int));
   _(SOUND_PCM_WRITE_FILTER, WRITE, sizeof(int));
   _(TCFLSH, NONE, 0);
-#if SANITIZER_GLIBC
-  _(TCGETA, WRITE, struct_termio_sz);
-#endif
   _(TCGETS, WRITE, struct_termios_sz);
   _(TCSBRK, NONE, 0);
   _(TCSBRKP, NONE, 0);
-#if SANITIZER_GLIBC
-  _(TCSETA, READ, struct_termio_sz);
-  _(TCSETAF, READ, struct_termio_sz);
-  _(TCSETAW, READ, struct_termio_sz);
-#endif
   _(TCSETS, READ, struct_termios_sz);
   _(TCSETSF, READ, struct_termios_sz);
   _(TCSETSW, READ, struct_termios_sz);
--- a/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp
+++ b/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp
@@ -479,9 +479,6 @@ 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);
--- a/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h
+++ b/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h
@@ -1013,7 +1013,6 @@ extern unsigned struct_hd_geometry_sz;
 extern unsigned struct_input_absinfo_sz;
 extern unsigned struct_input_id_sz;
 extern unsigned struct_mtpos_sz;
-extern unsigned struct_termio_sz;
 extern unsigned struct_vt_consize_sz;
 extern unsigned struct_vt_sizes_sz;
 extern unsigned struct_vt_stat_sz;
--- a/swift/stdlib/include/llvm/ADT/SmallVector.h
+++ b/swift/stdlib/include/llvm/ADT/SmallVector.h
@@ -22,6 +22,7 @@
 #include <cassert>
 #include <cstddef>
 #include <cstdlib>
+#include <cstdint>
 #include <cstring>
 #include <functional>
 #include <initializer_list>
--- a/swift-foundation/Sources/_FoundationCShims/include/_CStdlib.h
+++ b/swift-foundation/Sources/_FoundationCShims/include/_CStdlib.h
@@ -51,10 +51,6 @@
 #include <locale.h>
 #endif
 
-#if __has_include(<math.h>)
-#include <math.h>
-#endif
-
 #if __has_include(<signal.h>)
 /// Guard against including `signal.h` on WASI. The `signal.h` header file
 /// itself is available in wasi-libc, but it's just a stub that doesn't actually