Rollup merge of rust-lang#158020 - mati865:mingw-baseline, r=marcoieni

Update mingw-w64 C toolchain

Author: JonathanBrouwer

src/ci/scripts/install-mingw.sh

@@ -6,8 +6,8 @@ IFS=$'\n\t'
 
 source "$(cd "$(dirname "$0")" && pwd)/../shared.sh"
 
-MINGW_ARCHIVE_32="i686-14.1.0-release-posix-dwarf-msvcrt-rt_v12-rev0.7z"
-MINGW_ARCHIVE_64="x86_64-14.1.0-release-posix-seh-msvcrt-rt_v12-rev0.7z"
+MINGW_ARCHIVE_32="i686-14.2.0-release-posix-dwarf-msvcrt-rt_v12-rev2.7z"
+MINGW_ARCHIVE_64="x86_64-14.2.0-release-posix-seh-msvcrt-rt_v12-rev2.7z"
 LLVM_MINGW_ARCHIVE_AARCH64="llvm-mingw-20251104-ucrt-aarch64.zip"
 LLVM_MINGW_ARCHIVE_X86_64="llvm-mingw-20251104-ucrt-x86_64.zip"
 

src/doc/rustc/src/platform-support/windows-gnu.md

@@ -26,6 +26,18 @@ They follow Windows calling convention for `extern "C"`.
 
 Like with any other Windows target, created binaries are in PE format.
 
+### C toolchain
+
+The targets are built and tested using a reasonably modern C toolchain, and it should be considered as the oldest supported version:
+
+* GNU Binutils 2.44
+* GCC 14.2
+* mingw-w64 12.0.0
+* MSVCRT library as the default
+
+Using older tools (especially Binutils) may not work properly, due to the number of issues plaguing older versions of Binutils.
+The supported toolchain versions are subject to change.
+
 ## Building Rust programs
 
 Rust does ship a pre-compiled std library for those targets.