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