1 //===- SystemUtils.cpp - Utilities for low-level system tasks -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains functions used to do a variety of low-level, often
11 // system-specific, tasks.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/Support/Streams.h"
16 #include "llvm/Support/SystemUtils.h"
17 #include "llvm/System/Process.h"
18 #include "llvm/System/Program.h"
22 bool llvm::CheckBitcodeOutputToConsole(std::ostream* stream_to_check,
24 if (stream_to_check == cout.stream() &&
25 sys::Process::StandardOutIsDisplayed()) {
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";
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. Return the input string if given a full path to an executable.
43 #undef FindExecutable // needed on windows :(
44 sys::Path llvm::FindExecutable(const std::string &ExeName,
45 const std::string &ProgramPath) {
46 // First check if the given name is already a valid path to an executable.
47 sys::Path Result(ExeName);
48 Result.makeAbsolute();
49 if (Result.canExecute())
52 // Otherwise check the directory that the calling program is in. We can do
53 // this if ProgramPath contains at least one / character, indicating that it
54 // is a relative path to bugpoint itself.
56 Result.eraseComponent();
57 if (!Result.isEmpty()) {
58 Result.appendComponent(ExeName);
59 if (Result.canExecute())
63 return sys::Program::FindProgramByName(ExeName);