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 disable the link-time checking of mismatch for
  20    LLVM_ENABLE_ABI_BREAKING_CHECKS */
  21 #define LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING 0
  22 #if !LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING
  23
  24 // ABI_BREAKING_CHECKS protection: provides link-time failure when clients build
  25 // mismatch with LLVM
  26 #if defined(_MSC_VER)
  27 // Use pragma with MSVC
  28 #define LLVM_XSTR(s) LLVM_STR(s)
  29 #define LLVM_STR(s) #s
  30 #pragma detect_mismatch("LLVM_ENABLE_ABI_BREAKING_CHECKS", LLVM_XSTR(LLVM_ENABLE_ABI_BREAKING_CHECKS))
  31 #undef LLVM_XSTR
  32 #undef LLVM_STR
  33 #elif defined(_WIN32) || defined(__CYGWIN__) // Win32 w/o #pragma detect_mismatch
  34 // FIXME: Implement checks without weak.
  35 #elif defined(__cplusplus)
  36 namespace llvm {
  37 #if LLVM_ENABLE_ABI_BREAKING_CHECKS
  38 extern int EnableABIBreakingChecks;
  39 __attribute__((weak, visibility ("hidden"))) int *VerifyEnableABIBreakingChecks = &EnableABIBreakingChecks;
  40 #else
  41 extern int DisableABIBreakingChecks;
  42 __attribute__((weak, visibility ("hidden"))) int *VerifyDisableABIBreakingChecks = &DisableABIBreakingChecks;
  43 #endif
  44 }
  45 #endif // _MSC_VER
  46
  47 #endif // LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING
  48
  49 #endif