abi-breaking.h revision 360658
1/* $FreeBSD: stable/11/lib/clang/include/llvm/Config/abi-breaking.h 360658 2020-05-05 12:59:04Z dim $ */ 2/*===------- llvm/Config/abi-breaking.h - llvm configuration -------*- C -*-===*/ 3/* */ 4/* Part of the LLVM Project, under the Apache License v2.0 with LLVM */ 5/* Exceptions. */ 6/* See https://llvm.org/LICENSE.txt for license information. */ 7/* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception */ 8/* */ 9/*===----------------------------------------------------------------------===*/ 10 11/* This file controls the C++ ABI break introduced in LLVM public header. */ 12 13#ifndef LLVM_ABI_BREAKING_CHECKS_H 14#define LLVM_ABI_BREAKING_CHECKS_H 15 16/* Define to enable checks that alter the LLVM C++ ABI */ 17#define LLVM_ENABLE_ABI_BREAKING_CHECKS 1 18 19/* Define to enable reverse iteration of unordered llvm containers */ 20#define LLVM_ENABLE_REVERSE_ITERATION 0 21 22/* Allow selectively disabling link-time mismatch checking so that header-only 23 ADT content from LLVM can be used without linking libSupport. */ 24#if !LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING 25 26// ABI_BREAKING_CHECKS protection: provides link-time failure when clients build 27// mismatch with LLVM 28#if defined(_MSC_VER) 29// Use pragma with MSVC 30#define LLVM_XSTR(s) LLVM_STR(s) 31#define LLVM_STR(s) #s 32#pragma detect_mismatch("LLVM_ENABLE_ABI_BREAKING_CHECKS", LLVM_XSTR(LLVM_ENABLE_ABI_BREAKING_CHECKS)) 33#undef LLVM_XSTR 34#undef LLVM_STR 35#elif defined(_WIN32) || defined(__CYGWIN__) // Win32 w/o #pragma detect_mismatch 36// FIXME: Implement checks without weak. 37#elif defined(__cplusplus) 38#if !(defined(_AIX) && defined(__GNUC__) && !defined(__clang__)) 39#define LLVM_HIDDEN_VISIBILITY __attribute__ ((visibility("hidden"))) 40#else 41// GCC on AIX does not support visibility attributes. Symbols are not 42// exported by default on AIX. 43#define LLVM_HIDDEN_VISIBILITY 44#endif 45namespace llvm { 46#if LLVM_ENABLE_ABI_BREAKING_CHECKS 47extern int EnableABIBreakingChecks; 48LLVM_HIDDEN_VISIBILITY 49__attribute__((weak)) int *VerifyEnableABIBreakingChecks = 50 &EnableABIBreakingChecks; 51#else 52extern int DisableABIBreakingChecks; 53LLVM_HIDDEN_VISIBILITY 54__attribute__((weak)) int *VerifyDisableABIBreakingChecks = 55 &DisableABIBreakingChecks; 56#endif 57} 58#undef LLVM_HIDDEN_VISIBILITY 59#endif // _MSC_VER 60 61#endif // LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING 62 63#endif 64