SystemUtils.cpp revision 345b344e64ae3e0b595e660a7e0c1833ead42e18 
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"
18#include "llvm/Support/raw_ostream.h"
19using namespace llvm;
20
21bool 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/// FindExecutable - Find a named executable, given the value of argv[0] of the
36/// program being executed and the address of main itself. This allows us to
37/// find another LLVM tool if it is built in the same directory. An empty string
38/// is returned on error.
39#undef FindExecutable   // needed on windows :(
40sys::Path llvm::FindExecutable(const std::string &ExeName,
41                               const char *Argv0, void *MainAddr) {
42  // Check the directory that the calling program is in.  We can do
43  // this if ProgramPath contains at least one / character, indicating that it
44  // is a relative path to the executable itself.
45  sys::Path Result = sys::Path::GetMainExecutable(Argv0, MainAddr);
46  Result.eraseComponent();
47
48  if (!Result.isEmpty()) {
49    Result.appendComponent(ExeName);
50    Result.appendSuffix(sys::Path::GetEXESuffix());
51  }
52
53  return Result;
54}
55