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39 lines
1.2 KiB
C++
39 lines
1.2 KiB
C++
//===-- MCJIT.h - MC-Based Just-In-Time Execution Engine --------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file forces the MCJIT to link in on certain operating systems.
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// (Windows).
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_EXECUTION_ENGINE_MCJIT_H
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#define LLVM_EXECUTION_ENGINE_MCJIT_H
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#include "llvm/ExecutionEngine/ExecutionEngine.h"
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#include <cstdlib>
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extern "C" void LLVMLinkInMCJIT();
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namespace {
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struct ForceMCJITLinking {
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ForceMCJITLinking() {
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// We must reference MCJIT in such a way that compilers will not
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// delete it all as dead code, even with whole program optimization,
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// yet is effectively a NO-OP. As the compiler isn't smart enough
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// to know that getenv() never returns -1, this will do the job.
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if (std::getenv("bar") != (char*) -1)
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return;
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LLVMLinkInMCJIT();
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}
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} ForceMCJITLinking;
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}
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#endif
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