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--- build/rust/allocator/compiler_specific.h.orig 2025-05-20 09:16:26 UTC
+++ build/rust/allocator/compiler_specific.h
@@ -0,0 +1,38 @@
+// Copyright 2023 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This file has been copied from //base/compiler_specific.h (and then
+// significantly trimmed to just the APIs / macros needed by //build/rust/std).
+//
+// TODO(crbug.com/40279749): Avoid code duplication / reuse code.
+
+#ifndef BUILD_RUST_ALLOCATOR_COMPILER_SPECIFIC_H_
+#define BUILD_RUST_ALLOCATOR_COMPILER_SPECIFIC_H_
+
+#include "build/build_config.h"
+
+#if defined(COMPILER_MSVC) && !defined(__clang__)
+#error "Only clang-cl is supported on Windows, see https://crbug.com/988071"
+#endif
+
+#if defined(__has_attribute)
+#define HAS_ATTRIBUTE(x) __has_attribute(x)
+#else
+#define HAS_ATTRIBUTE(x) 0
+#endif
+
+// Annotate a function indicating it should not be inlined.
+// Use like:
+// NOINLINE void DoStuff() { ... }
+#if defined(__clang__) && HAS_ATTRIBUTE(noinline)
+#define NOINLINE [[clang::noinline]]
+#elif defined(COMPILER_GCC) && HAS_ATTRIBUTE(noinline)
+#define NOINLINE __attribute__((noinline))
+#elif defined(COMPILER_MSVC)
+#define NOINLINE __declspec(noinline)
+#else
+#define NOINLINE
+#endif
+
+#endif // BUILD_RUST_ALLOCATOR_COMPILER_SPECIFIC_H_
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