lib/clang/include/llvm/Config/abi-breaking.h

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