1 //===- SystemUtils.cpp - Utilities for low-level system tasks -------------===// 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 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 #include <ostream> 20 using namespace llvm; 21 22 bool llvm::CheckBitcodeOutputToConsole(std::ostream* stream_to_check, 23 bool print_warning) { 24 if (stream_to_check == cout.stream() && 25 sys::Process::StandardOutIsDisplayed()) { 26 if (print_warning) { 27 cerr << "WARNING: You're attempting to print out a bitcode file.\n" 28 << "This is inadvisable as it may cause display problems. If\n" 29 << "you REALLY want to taste LLVM bitcode first-hand, you\n" 30 << "can force output with the `-f' option.\n\n"; 31 } 32 return true; 33 } 34 return false; 35 } 36 37 /// FindExecutable - Find a named executable, giving the argv[0] of program 38 /// being executed. This allows us to find another LLVM tool if it is built 39 /// into the same directory, but that directory is neither the current 40 /// directory, nor in the PATH. If the executable cannot be found, return an 41 /// empty string. 42 /// 43 #undef FindExecutable // needed on windows :( 44 sys::Path llvm::FindExecutable(const std::string &ExeName, 45 const std::string &ProgramPath) { 46 // First check the directory that the calling program is in. We can do this 47 // if ProgramPath contains at least one / character, indicating that it is a 48 // relative path to bugpoint itself. 49 sys::Path Result ( ProgramPath ); 50 Result.eraseComponent(); 51 if (!Result.isEmpty()) { 52 Result.appendComponent(ExeName); 53 if (Result.canExecute()) 54 return Result; 55 } 56 57 return sys::Program::FindProgramByName(ExeName); 58 } 59