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llvm-mirror/lib/Linker/Linker.cpp
Reid Spencer 2b33292a67 Adjust the constructor to the Linker class to take an argument that names
the module being constructed. This is used to correctly name the module.
Previously the name of the linker tool was used which produces confusing
output when the module identifier is used in an error message.

llvm-svn: 24699
2005-12-13 20:00:37 +00:00

178 lines
4.7 KiB
C++

//===- lib/Linker/Linker.cpp - Basic Linker functionality ----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Reid Spencer and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains basic Linker functionality that all usages will need.
//
//===----------------------------------------------------------------------===//
#include "llvm/Linker.h"
#include "llvm/Module.h"
#include "llvm/Bytecode/Reader.h"
#include "llvm/Config/config.h"
#include <iostream>
using namespace llvm;
Linker::Linker(const std::string& progname, const std::string& modname, unsigned flags)
: Composite(0)
, LibPaths()
, Flags(flags)
, Error()
, ProgramName(progname)
{
Composite = new Module(modname);
}
Linker::Linker(const std::string& progname, Module* aModule, unsigned flags)
: Composite(aModule)
, LibPaths()
, Flags(flags)
, Error()
, ProgramName(progname)
{
}
Linker::~Linker() {
delete Composite;
}
bool
Linker::error(const std::string& message) {
Error = message;
if (!(Flags&QuietErrors)) {
std::cerr << ProgramName << ": error: " << message << "\n";
}
return true;
}
bool
Linker::warning(const std::string& message) {
Error = message;
if (!(Flags&QuietErrors)) {
std::cerr << ProgramName << ": warning: " << message << "\n";
}
return false;
}
void
Linker::verbose(const std::string& message) {
if (Flags&Verbose) {
std::cerr << " " << message << "\n";
}
}
void
Linker::addPath(const sys::Path& path) {
LibPaths.push_back(path);
}
void
Linker::addPaths(const std::vector<std::string>& paths) {
for (unsigned i = 0; i != paths.size(); ++i) {
sys::Path aPath;
aPath.set(paths[i]);
LibPaths.push_back(aPath);
}
}
void
Linker::addSystemPaths() {
sys::Path::GetBytecodeLibraryPaths(LibPaths);
LibPaths.insert(LibPaths.begin(),sys::Path("./"));
}
Module*
Linker::releaseModule() {
Module* result = Composite;
LibPaths.clear();
Error.clear();
Composite = 0;
Flags = 0;
return result;
}
// LoadObject - Read in and parse the bytecode file named by FN and return the
// module it contains (wrapped in an auto_ptr), or auto_ptr<Module>() and set
// Error if an error occurs.
std::auto_ptr<Module>
Linker::LoadObject(const sys::Path &FN) {
std::string ParseErrorMessage;
Module *Result = ParseBytecodeFile(FN.toString(), &ParseErrorMessage);
if (Result)
return std::auto_ptr<Module>(Result);
Error = "Bytecode file '" + FN.toString() + "' could not be loaded";
if (ParseErrorMessage.size())
Error += ": " + ParseErrorMessage;
return std::auto_ptr<Module>();
}
// IsLibrary - Determine if "Name" is a library in "Directory". Return
// a non-empty sys::Path if its found, an empty one otherwise.
static inline sys::Path IsLibrary(const std::string& Name,
const sys::Path& Directory) {
sys::Path FullPath(Directory);
// Make sure the directory actually is a directory in the file system.
if (FullPath.isDirectory())
{
// Try the libX.a form
FullPath.appendComponent("lib" + Name);
FullPath.appendSuffix("a");
if (FullPath.isArchive())
return FullPath;
// Try the libX.bca form
FullPath.eraseSuffix();
FullPath.appendSuffix("bca");
if (FullPath.isArchive())
return FullPath;
// Try the libX.so form
FullPath.eraseSuffix();
FullPath.appendSuffix(&(LTDL_SHLIB_EXT[1]));
if (FullPath.isDynamicLibrary()) // Native shared library?
return FullPath;
if (FullPath.isBytecodeFile()) // .so file containing bytecode?
return FullPath;
// Not found .. fall through
}
// Indicate that the library was not found in the directory.
FullPath.clear();
return FullPath;
}
/// FindLib - Try to convert Filename into the name of a file that we can open,
/// if it does not already name a file we can open, by first trying to open
/// Filename, then libFilename.[suffix] for each of a set of several common
/// library suffixes, in each of the directories in LibPaths. Returns an empty
/// Path if no matching file can be found.
///
sys::Path
Linker::FindLib(const std::string &Filename)
{
// Determine if the pathname can be found as it stands.
sys::Path FilePath(Filename);
if (FilePath.canRead() &&
(FilePath.isArchive() || FilePath.isDynamicLibrary()))
return FilePath;
// Iterate over the directories in Paths to see if we can find the library
// there.
for (unsigned Index = 0; Index != LibPaths.size(); ++Index) {
sys::Path Directory(LibPaths[Index]);
sys::Path FullPath = IsLibrary(Filename,Directory);
if (!FullPath.isEmpty())
return FullPath;
}
return sys::Path();
}