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 44 namespace llvm { 45 #if LLVM_ENABLE_ABI_BREAKING_CHECKS 46 extern int EnableABIBreakingChecks; 47 LLVM_HIDDEN_VISIBILITY 48 __attribute__((weak)) int *VerifyEnableABIBreakingChecks = 49 &EnableABIBreakingChecks; 50 #else 51 extern int DisableABIBreakingChecks; 52 LLVM_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