SystemUtils.cpp revision 208954 
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, 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