• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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
51