1 //===- SystemUtils.cpp - Utilities for low-level system tasks -------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file was developed by the LLVM research group and is distributed under 6 // the University of Illinois Open Source License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file contains functions used to do a variety of low-level, often 11 // system-specific, tasks. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #include "llvm/Support/Streams.h" 16 #include "llvm/Support/SystemUtils.h" 17 #include "llvm/System/Process.h" 18 #include "llvm/System/Program.h" 19 using namespace llvm; 20 21 bool llvm::CheckBytecodeOutputToConsole(std::ostream* stream_to_check, 22 bool print_warning) { 23 if (stream_to_check == cout.stream() && 24 sys::Process::StandardOutIsDisplayed()) { 25 if (print_warning) { 26 cerr << "WARNING: You're attempting to print out a bytecode file.\n" 27 << "This is inadvisable as it may cause display problems. If\n" 28 << "you REALLY want to taste LLVM bytecode first-hand, you\n" 29 << "can force output with the `-f' option.\n\n"; 30 } 31 return true; 32 } 33 return false; 34 } 35 36 /// FindExecutable - Find a named executable, giving the argv[0] of program 37 /// being executed. This allows us to find another LLVM tool if it is built 38 /// into the same directory, but that directory is neither the current 39 /// directory, nor in the PATH. If the executable cannot be found, return an 40 /// empty string. 41 /// 42 #undef FindExecutable // needed on windows :( 43 sys::Path llvm::FindExecutable(const std::string &ExeName, 44 const std::string &ProgramPath) { 45 // First check the directory that the calling program is in. We can do this 46 // if ProgramPath contains at least one / character, indicating that it is a 47 // relative path to bugpoint itself. 48 sys::Path Result ( ProgramPath ); 49 Result.eraseComponent(); 50 if (!Result.isEmpty()) { 51 Result.appendComponent(ExeName); 52 if (Result.canExecute()) 53 return Result; 54 } 55 56 return sys::Program::FindProgramByName(ExeName); 57 } 58