From c3115285164b7c3762be12c2925d7ec76106e6f6 Mon Sep 17 00:00:00 2001 From: Mehdi Amini Date: Fri, 18 Nov 2016 17:28:10 +0000 Subject: Add link-time detection of LLVM_ABI_BREAKING_CHECKS mismatch Summary: LLVM will define a symbol, either EnableABIBreakingChecks or DisableABIBreakingChecks depending on the configuration setting for LLVM_ABI_BREAKING_CHECKS. The llvm-config.h header will add weak references to these symbols in every clients that includes this header. This should ensure that a mismatch triggers a link failure (or a load time failure for DSO). On MSVC, the pragma "detect_mismatch" is used instead. Reviewers: rnk, jroelofs Subscribers: llvm-commits, mgorny Differential Revision: https://reviews.llvm.org/D26841 llvm-svn: 287352 --- llvm/lib/Support/Error.cpp | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'llvm/lib/Support/Error.cpp') diff --git a/llvm/lib/Support/Error.cpp b/llvm/lib/Support/Error.cpp index 7436a1fd38e..f818868b641 100644 --- a/llvm/lib/Support/Error.cpp +++ b/llvm/lib/Support/Error.cpp @@ -112,3 +112,19 @@ void report_fatal_error(Error Err, bool GenCrashDiag) { } } + + +#ifndef _MSC_VER +namespace llvm { + +// One of these two variables will be referenced by a symbol defined in +// llvm-config.h. We provide a link-time (or load time for DSO) failure when +// there is a mismatch in the build configuration of the API client and LLVM. +#if LLVM_ENABLE_ABI_BREAKING_CHECKS +int EnableABIBreakingChecks; +#else +int DisableABIBreakingChecks; +#endif + +} // end namespace llvm +#endif \ No newline at end of file -- cgit v1.2.3