abi-breaking.h revision 324023 
1/* $FreeBSD: stable/11/lib/clang/include/llvm/Config/abi-breaking.h 324023 2017-09-26 19:56:36Z dim $ */
2/*===------- llvm/Config/abi-breaking.h - llvm configuration -------*- C -*-===*/
3/*                                                                            */
4/*                     The LLVM Compiler Infrastructure                       */
5/*                                                                            */
6/* This file is distributed under the University of Illinois Open Source      */
7/* License. See LICENSE.TXT for details.                                      */
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)
38namespace llvm {
39#if LLVM_ENABLE_ABI_BREAKING_CHECKS
40extern int EnableABIBreakingChecks;
41__attribute__((weak, visibility ("hidden"))) int *VerifyEnableABIBreakingChecks = &EnableABIBreakingChecks;
42#else
43extern int DisableABIBreakingChecks;
44__attribute__((weak, visibility ("hidden"))) int *VerifyDisableABIBreakingChecks = &DisableABIBreakingChecks;
45#endif
46}
47#endif // _MSC_VER
48
49#endif // LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING
50
51#endif
52