llvm-6502/lib/Support/SystemUtils.cpp
Daniel Dunbar a00e85c9b1 Improve sys::Path::makeAbsolute on Win32.
- Patch by Viktor Kutuzov!

 - Minor tweak by me to add llvm_unreachable calls on FIXMEd error paths.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75424 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-12 20:23:56 +00:00

65 lines
2.4 KiB
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//===- SystemUtils.cpp - Utilities for low-level system tasks -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains functions used to do a variety of low-level, often
// system-specific, tasks.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/Streams.h"
#include "llvm/Support/SystemUtils.h"
#include "llvm/System/Process.h"
#include "llvm/System/Program.h"
#include <ostream>
using namespace llvm;
bool llvm::CheckBitcodeOutputToConsole(std::ostream* stream_to_check,
bool print_warning) {
if (stream_to_check == cout.stream() &&
sys::Process::StandardOutIsDisplayed()) {
if (print_warning) {
cerr << "WARNING: You're attempting to print out a bitcode file.\n"
<< "This is inadvisable as it may cause display problems. If\n"
<< "you REALLY want to taste LLVM bitcode first-hand, you\n"
<< "can force output with the `-f' option.\n\n";
}
return true;
}
return false;
}
/// FindExecutable - Find a named executable, giving the argv[0] of program
/// being executed. This allows us to find another LLVM tool if it is built
/// into the same directory, but that directory is neither the current
/// directory, nor in the PATH. If the executable cannot be found, return an
/// empty string. Return the input string if given a full path to an executable.
///
#undef FindExecutable // needed on windows :(
sys::Path llvm::FindExecutable(const std::string &ExeName,
const std::string &ProgramPath) {
// First check if the given name is already a valid path to an executable.
sys::Path Result(ExeName);
Result.makeAbsolute();
if (Result.canExecute())
return Result;
// Otherwise check the directory that the calling program is in. We can do
// this if ProgramPath contains at least one / character, indicating that it
// is a relative path to the executable itself.
Result = ProgramPath;
Result.eraseComponent();
if (!Result.isEmpty()) {
Result.appendComponent(ExeName);
if (Result.canExecute())
return Result;
}
return sys::Program::FindProgramByName(ExeName);
}