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/Support/PathV1.h" 17 #include "llvm/Support/Process.h" 18 #include "llvm/Support/Program.h" 19 #include "llvm/Support/raw_ostream.h" 20 using namespace llvm; 21 22 bool llvm::CheckBitcodeOutputToConsole(raw_ostream &stream_to_check, 23 bool print_warning) { 24 if (stream_to_check.is_displayed()) { 25 if (print_warning) { 26 errs() << "WARNING: You're attempting to print out a bitcode file.\n" 27 "This is inadvisable as it may cause display problems. If\n" 28 "you REALLY want to taste LLVM bitcode 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 /// PrependMainExecutablePath - Prepend the path to the program being executed 37 /// to \p ExeName, given the value of argv[0] and the address of main() 38 /// itself. This allows us to find another LLVM tool if it is built in the same 39 /// directory. An empty string is returned on error; note that this function 40 /// just mainpulates the path and doesn't check for executability. 41 /// @brief Find a named executable. 42 sys::Path llvm::PrependMainExecutablePath(const std::string &ExeName, 43 const char *Argv0, void *MainAddr) { 44 // Check the directory that the calling program is in. We can do 45 // this if ProgramPath contains at least one / character, indicating that it 46 // is a relative path to the executable itself. 47 sys::Path Result = sys::Path::GetMainExecutable(Argv0, MainAddr); 48 Result.eraseComponent(); 49 50 if (!Result.isEmpty()) { 51 Result.appendComponent(ExeName); 52 Result.appendSuffix(sys::Path::GetEXESuffix()); 53 } 54 55 return Result; 56 } 57