third_party/llvm-7.0/configs/darwin/include/llvm/Config/abi-breaking.h

   1 /*===------- llvm/Config/abi-breaking.h - llvm configuration -------*- C -*-===*/
   2 /*                                                                            */
   3 /*                     The LLVM Compiler Infrastructure                       */
   4 /*                                                                            */
   5 /* This file is distributed under the University of Illinois Open Source      */
   6 /* License. See LICENSE.TXT for details.                                      */
   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 0
  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 !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 namespace llvm {
  38 #if LLVM_ENABLE_ABI_BREAKING_CHECKS
  39 extern int EnableABIBreakingChecks;
  40 __attribute__((weak, visibility ("hidden"))) int *VerifyEnableABIBreakingChecks = &EnableABIBreakingChecks;
  41 #else
  42 extern int DisableABIBreakingChecks;
  43 __attribute__((weak, visibility ("hidden"))) int *VerifyDisableABIBreakingChecks = &DisableABIBreakingChecks;
  44 #endif
  45 }
  46 #endif // _MSC_VER
  47
  48 #endif // LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING
  49
  50 #endif