From eac0b3a1d1b8d1db8fa95c50e118de5b9471e5af Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mateusz=20Miku=C5=82a?= <mati865@gmail.com>
Date: Sun, 21 Apr 2024 20:15:43 +0200
Subject: [PATCH] Add `-lmingwex` second time in `mingw_libs`

Upcoming mingw-w64 releases will contain small math functions refactor which moved implementation around.
As a result functions like `lgamma`
now depend on libraries in this order:
`libmingwex.a` -> `libmsvcrt.a` -> `libmingwex.a`.

Fixes #124221
---
 compiler/rustc_target/src/spec/base/windows_gnu.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/compiler/rustc_target/src/spec/base/windows_gnu.rs b/compiler/rustc_target/src/spec/base/windows_gnu.rs
index 25f02dc145193..1357de2dad126 100644
--- a/compiler/rustc_target/src/spec/base/windows_gnu.rs
+++ b/compiler/rustc_target/src/spec/base/windows_gnu.rs
@@ -40,6 +40,9 @@ pub fn opts() -> TargetOptions {
         //
         // See https://github.com/rust-lang/rust/pull/47483 for some more details.
         "-lmsvcrt",
+        // Math functions missing in MSVCRT (they are present in UCRT) require
+        // this dependency cycle: `libmingwex.a` -> `libmsvcrt.a` -> `libmingwex.a`.
+        "-lmingwex",
         "-luser32",
         "-lkernel32",
     ];