1 /* $FreeBSD$ */ 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 !defined(LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING) || !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 45 namespace llvm { 46 #if LLVM_ENABLE_ABI_BREAKING_CHECKS 47 extern int EnableABIBreakingChecks; 48 LLVM_HIDDEN_VISIBILITY 49 __attribute__((weak)) int *VerifyEnableABIBreakingChecks = 50 &EnableABIBreakingChecks; 51 #else 52 extern int DisableABIBreakingChecks; 53 LLVM_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