1//===- llvm/Codegen/LinkAllAsmWriterComponents.h ----------------*- 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 header file pulls in all assembler writer related passes for tools like
11// llc that need this functionality.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_CODEGEN_LINKALLASMWRITERCOMPONENTS_H
16#define LLVM_CODEGEN_LINKALLASMWRITERCOMPONENTS_H
17
18#include "llvm/CodeGen/GCs.h"
19#include <cstdlib>
20
21namespace {
22  struct ForceAsmWriterLinking {
23    ForceAsmWriterLinking() {
24      // We must reference the plug-ins in such a way that compilers will not
25      // delete it all as dead code, even with whole program optimization,
26      // yet is effectively a NO-OP. As the compiler isn't smart enough
27      // to know that getenv() never returns -1, this will do the job.
28      if (std::getenv("bar") != (char*) -1)
29        return;
30
31      llvm::linkOcamlGCPrinter();
32      llvm::linkErlangGCPrinter();
33
34    }
35  } ForceAsmWriterLinking; // Force link by creating a global definition.
36}
37
38#endif // LLVM_CODEGEN_LINKALLASMWRITERCOMPONENTS_H
39