From 078c29fb66ea89b61cc83b1f8c4a10a5f9ae204d Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Tue, 3 Mar 2026 05:47:42 -0800
Subject: [PATCH] `<complex>`: Include full `<intrin.h>` for Clang 22
 compatibility

---
 stl/inc/complex | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/stl/inc/complex b/stl/inc/complex
index 50ca9ae0aa9..f7960e5fe0c 100644
--- a/stl/inc/complex
+++ b/stl/inc/complex
@@ -24,8 +24,7 @@
 #elif defined(_M_IX86) || defined(_M_X64)
 #define _FMP_USING_X86_X64_INTRINSICS
 #include <__msvc_bit_utils.hpp>
-#include <emmintrin.h>
-extern "C" __m128d __cdecl _mm_fmsub_sd(__m128d, __m128d, __m128d);
+#include <intrin.h>
 #endif // ^^^ defined(_M_IX86) || defined(_M_X64) ^^^
 
 #pragma pack(push, _CRT_PACKING)