================ @@ -0,0 +1,67 @@ +//===-- clang/Support/Compiler.h - Compiler abstraction support -*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// This file defines explicit visibility macros used to export symbols from +// clang-cpp +// +//===----------------------------------------------------------------------===// + +#ifndef CLANG_SUPPORT_COMPILER_H +#define CLANG_SUPPORT_COMPILER_H + +#include "llvm/Support/Compiler.h" + +/// CLANG_ABI is the main export/visibility macro to mark something as +/// explicitly exported when clang is built as a shared library with everything +/// else that is unannotated will have internal visibility. +/// +/// CLANG_EXPORT_TEMPLATE is used on explicit template instantiations in source +/// files that were declared extern in a header. This macro is only set as a +/// compiler export attribute on windows, on other platforms it does nothing. +/// +/// CLANG_TEMPLATE_ABI is for annotating extern template declarations in headers +/// for both functions and classes. On windows its turned in to dllimport for +/// library consumers, for other platforms its a default visibility attribute. +#ifndef CLANG_ABI_GENERATING_ANNOTATIONS +// Marker to add to classes or functions in public headers that should not have +// export macros added to them by the clang tool ---------------- AaronBallman wrote:
The downside to this is that it's very difficult to know whether or not an API should or shouldn't be exported by the tool. For example, in `Sema`, would we want to export the `ActOn*` and `Build*` APIs? Probably! But what about the `Check*` APIs? Maybe for most of them. But things like `FillInlineAsmIdentifierInfo`? Probably not. I seem to recall there being a functional limit to how many interfaces can be exposed in a DLL (I could be remembering wrong though, it's been a while!), so is there harm to over-exposing APIs? https://github.com/llvm/llvm-project/pull/108276 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
