| 1 | /*===------- llvm/Config/abi-breaking.h - llvm configuration -------*- C -*-===*/ |
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| 2 | /* */ |
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| 3 | /* Part of the LLVM Project, under the Apache License v2.0 with LLVM */ |
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| 4 | /* Exceptions. */ |
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| 5 | /* See https://llvm.org/LICENSE.txt for license information. */ |
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| 6 | /* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception */ |
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| 7 | /* */ |
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| 8 | /*===----------------------------------------------------------------------===*/ |
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| 9 | |
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| 10 | /* This file controls the C++ ABI break introduced in LLVM public header. */ |
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| 11 | |
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| 12 | #ifndef LLVM_ABI_BREAKING_CHECKS_H |
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| 13 | #define LLVM_ABI_BREAKING_CHECKS_H |
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| 14 | |
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| 15 | /* Define to enable checks that alter the LLVM C++ ABI */ |
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| 16 | #define LLVM_ENABLE_ABI_BREAKING_CHECKS 1 |
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| 17 | |
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| 18 | /* Define to enable reverse iteration of unordered llvm containers */ |
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| 19 | #define LLVM_ENABLE_REVERSE_ITERATION 0 |
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| 20 | |
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| 21 | /* Allow selectively disabling link-time mismatch checking so that header-only |
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| 22 | ADT content from LLVM can be used without linking libSupport. */ |
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| 23 | #if !defined(LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING) || !LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING |
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| 24 | |
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| 25 | // ABI_BREAKING_CHECKS protection: provides link-time failure when clients build |
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| 26 | // mismatch with LLVM |
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| 27 | #if defined(_MSC_VER) |
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| 28 | // Use pragma with MSVC |
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| 29 | #define LLVM_XSTR(s) LLVM_STR(s) |
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| 30 | #define LLVM_STR(s) #s |
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| 31 | #pragma detect_mismatch("LLVM_ENABLE_ABI_BREAKING_CHECKS", LLVM_XSTR(LLVM_ENABLE_ABI_BREAKING_CHECKS)) |
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| 32 | #undef LLVM_XSTR |
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| 33 | #undef LLVM_STR |
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| 34 | #elif defined(_WIN32) || defined(__CYGWIN__) // Win32 w/o #pragma detect_mismatch |
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| 35 | // FIXME: Implement checks without weak. |
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| 36 | #elif defined(__cplusplus) |
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| 37 | #if !(defined(_AIX) && defined(__GNUC__) && !defined(__clang__)) |
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| 38 | #define LLVM_HIDDEN_VISIBILITY __attribute__ ((visibility("hidden"))) |
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| 39 | #else |
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| 40 | // GCC on AIX does not support visibility attributes. Symbols are not |
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| 41 | // exported by default on AIX. |
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| 42 | #define LLVM_HIDDEN_VISIBILITY |
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| 43 | #endif |
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| 44 | namespace llvm { |
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| 45 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS |
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| 46 | extern int EnableABIBreakingChecks; |
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| 47 | LLVM_HIDDEN_VISIBILITY |
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| 48 | __attribute__((weak)) int *VerifyEnableABIBreakingChecks = |
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| 49 | &EnableABIBreakingChecks; |
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| 50 | #else |
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| 51 | extern int DisableABIBreakingChecks; |
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| 52 | LLVM_HIDDEN_VISIBILITY |
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| 53 | __attribute__((weak)) int *VerifyDisableABIBreakingChecks = |
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| 54 | &DisableABIBreakingChecks; |
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| 55 | #endif |
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| 56 | } |
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| 57 | #undef LLVM_HIDDEN_VISIBILITY |
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| 58 | #endif // _MSC_VER |
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| 59 | |
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| 60 | #endif // LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING |
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| 61 | |
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| 62 | #endif |
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| 63 | |
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