SystemUtils.cpp revision 1a097e30d39e60303ae2b19f7a56e813f3e3c18e
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#include <ostream> 20using namespace llvm; 21 22bool llvm::CheckBytecodeOutputToConsole(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 bytecode file.\n" 28 << "This is inadvisable as it may cause display problems. If\n" 29 << "you REALLY want to taste LLVM bytecode 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 :( 44sys::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