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 #if defined(NDEBUG) 17 #define LLVM_ENABLE_ABI_BREAKING_CHECKS 0 18 #else 19 #define LLVM_ENABLE_ABI_BREAKING_CHECKS 1 20 #endif 21 22 /* Define to enable reverse iteration of unordered llvm containers */ 23 #define LLVM_ENABLE_REVERSE_ITERATION 0 24 25 /* Allow selectively disabling link-time mismatch checking so that header-only 26 ADT content from LLVM can be used without linking libSupport. */ 27 #if !LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING 28 29 // ABI_BREAKING_CHECKS protection: provides link-time failure when clients build 30 // mismatch with LLVM 31 #if defined(_MSC_VER) 32 // Use pragma with MSVC 33 #define LLVM_XSTR(s) LLVM_STR(s) 34 #define LLVM_STR(s) #s 35 #pragma detect_mismatch("LLVM_ENABLE_ABI_BREAKING_CHECKS", LLVM_XSTR(LLVM_ENABLE_ABI_BREAKING_CHECKS)) 36 #undef LLVM_XSTR 37 #undef LLVM_STR 38 #elif defined(_WIN32) || defined(__CYGWIN__) // Win32 w/o #pragma detect_mismatch 39 // FIXME: Implement checks without weak. 40 #elif defined(__cplusplus) 41 #if !(defined(_AIX) && defined(__GNUC__) && !defined(__clang__)) 42 #define LLVM_HIDDEN_VISIBILITY __attribute__ ((visibility("hidden"))) 43 #else 44 // GCC on AIX does not support visibility attributes. Symbols are not 45 // exported by default on AIX. 46 #define LLVM_HIDDEN_VISIBILITY 47 #endif 48 namespace llvm { 49 #if LLVM_ENABLE_ABI_BREAKING_CHECKS 50 extern int EnableABIBreakingChecks; 51 LLVM_HIDDEN_VISIBILITY 52 __attribute__((weak)) int *VerifyEnableABIBreakingChecks = 53 &EnableABIBreakingChecks; 54 #else 55 extern int DisableABIBreakingChecks; 56 LLVM_HIDDEN_VISIBILITY 57 __attribute__((weak)) int *VerifyDisableABIBreakingChecks = 58 &DisableABIBreakingChecks; 59 #endif 60 } 61 #undef LLVM_HIDDEN_VISIBILITY 62 #endif // _MSC_VER 63 64 #endif // LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING 65 66 #endif 67