/*===------- llvm/Config/abi-breaking.h - llvm configuration -------*- C -*-===*/
/*                                                                            */
/*                     The LLVM Compiler Infrastructure                       */
/*                                                                            */
/* This file is distributed under the University of Illinois Open Source      */
/* License. See LICENSE.TXT for details.                                      */
/*                                                                            */
/*===----------------------------------------------------------------------===*/

/* This file controls the C++ ABI break introduced in LLVM public header. */

#ifndef LLVM_ABI_BREAKING_CHECKS_H
#define LLVM_ABI_BREAKING_CHECKS_H

/* Define to enable checks that alter the LLVM C++ ABI */
#define LLVM_ENABLE_ABI_BREAKING_CHECKS 1

/* Allow selectively disabling link-time mismatch checking so that header-only
   ADT content from LLVM can be used without linking libSupport. */
#if !LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING

// ABI_BREAKING_CHECKS protection: provides link-time failure when clients build
// mismatch with LLVM
#if defined(_MSC_VER)
// Use pragma with MSVC
#define LLVM_XSTR(s) LLVM_STR(s)
#define LLVM_STR(s) #s
#pragma detect_mismatch("LLVM_ENABLE_ABI_BREAKING_CHECKS", LLVM_XSTR(LLVM_ENABLE_ABI_BREAKING_CHECKS))
#undef LLVM_XSTR
#undef LLVM_STR
#elif defined(_WIN32) || defined(__CYGWIN__) // Win32 w/o #pragma detect_mismatch
// FIXME: Implement checks without weak.
#elif defined(__cplusplus)
namespace llvm {
#if LLVM_ENABLE_ABI_BREAKING_CHECKS
extern int EnableABIBreakingChecks;
__attribute__((weak, visibility ("hidden"))) int *VerifyEnableABIBreakingChecks = &EnableABIBreakingChecks;
#else
extern int DisableABIBreakingChecks;
__attribute__((weak, visibility ("hidden"))) int *VerifyDisableABIBreakingChecks = &DisableABIBreakingChecks;
#endif
}
#endif // _MSC_VER

#endif // LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING

#endif
