SystemUtils.cpp revision b683ea4712836e22b98d24bf8e40e599224d024e
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/SystemUtils.h" 16#include "llvm/System/Process.h" 17#include "llvm/System/Program.h" 18using namespace llvm; 19 20bool llvm::CheckBitcodeOutputToConsole(raw_ostream &stream_to_check, 21 bool print_warning) { 22 if (&stream_to_check == &outs() && 23 sys::Process::StandardOutIsDisplayed()) { 24 if (print_warning) { 25 errs() << "WARNING: You're attempting to print out a bitcode file.\n" 26 << "This is inadvisable as it may cause display problems. If\n" 27 << "you REALLY want to taste LLVM bitcode first-hand, you\n" 28 << "can force output with the `-f' option.\n\n"; 29 } 30 return true; 31 } 32 return false; 33} 34 35/// FindExecutable - Find a named executable, giving the argv[0] of program 36/// being executed. This allows us to find another LLVM tool if it is built in 37/// the same directory. If the executable cannot be found, return an 38/// empty string. 39/// @brief Find a named executable. 40#undef FindExecutable // needed on windows :( 41sys::Path llvm::FindExecutable(const std::string &ExeName, 42 const char *Argv0, void *MainAddr) { 43 // Check the directory that the calling program is in. We can do 44 // this if ProgramPath contains at least one / character, indicating that it 45 // is a relative path to the executable itself. 46 sys::Path Result = sys::Path::GetMainExecutable(Argv0, MainAddr); 47 Result.eraseComponent(); 48 if (!Result.isEmpty()) { 49 Result.appendComponent(ExeName); 50 if (Result.canExecute()) 51 return Result; 52 } 53 54 return sys::Path(); 55} 56