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/Process.h" 17 #include "llvm/Support/Program.h" 18 #include "llvm/Support/raw_ostream.h" 19 using namespace llvm; 20 21 bool llvm::CheckBitcodeOutputToConsole(raw_ostream &stream_to_check, 22 bool print_warning) { 23 if (stream_to_check.is_displayed()) { 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 /// PrependMainExecutablePath - Prepend the path to the program being executed 36 /// to \p ExeName, given the value of argv[0] and the address of main() 37 /// itself. This allows us to find another LLVM tool if it is built in the same 38 /// directory. An empty string is returned on error; note that this function 39 /// just mainpulates the path and doesn't check for executability. 40 /// @brief Find a named executable. 41 sys::Path llvm::PrependMainExecutablePath(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 49 if (!Result.isEmpty()) { 50 Result.appendComponent(ExeName); 51 Result.appendSuffix(sys::Path::GetEXESuffix()); 52 } 53 54 return Result; 55 } 56
