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 21 namespace { 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 33 } 34 } ForceAsmWriterLinking; // Force link by creating a global definition. 35 } 36 37 #endif // LLVM_CODEGEN_LINKALLASMWRITERCOMPONENTS_H 38
