1 //===---- OrcMCJITReplacement.h - Orc-based MCJIT replacement ---*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file forces OrcMCJITReplacement to link in on certain operating systems.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_EXECUTIONENGINE_ORCMCJITREPLACEMENT_H
16 #define LLVM_EXECUTIONENGINE_ORCMCJITREPLACEMENT_H
18 #include "llvm/ExecutionEngine/ExecutionEngine.h"
21 extern "C" void LLVMLinkInOrcMCJITReplacement();
24 struct ForceOrcMCJITReplacementLinking {
25 ForceOrcMCJITReplacementLinking() {
26 // We must reference OrcMCJITReplacement in such a way that compilers will
27 // not delete it all as dead code, even with whole program optimization,
28 // yet is effectively a NO-OP. As the compiler isn't smart enough to know
29 // that getenv() never returns -1, this will do the job.
30 if (std::getenv("bar") != (char*) -1)
33 LLVMLinkInOrcMCJITReplacement();
35 } ForceOrcMCJITReplacementLinking;