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//===- lib/Linker/LinkArchives.cpp - Link LLVM objects and libraries ------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains routines to handle linking together LLVM bytecode files,
// and to handle annoying things like static libraries.
//
//===----------------------------------------------------------------------===//
#include "llvm/Linker.h"
#include "llvm/Module.h"
//#include "llvm/Bytecode/Archive.h"
using namespace llvm;
/// LinkInFile - opens a bytecode file and links in all objects which
/// provide symbols that are currently undefined.
///
/// Inputs:
/// HeadModule - The module in which to link the bytecode file.
/// Filename - The pathname of the bytecode file.
/// Verbose - Flags whether verbose messages should be printed.
///
/// Outputs:
/// ErrorMessage - A C++ string detailing what error occurred, if any.
///
/// Return Value:
/// TRUE - An error occurred.
/// FALSE - No errors.
///
bool
Linker::LinkInFile(const sys::Path &File)
{
// Make sure we can at least read the file
if (!File.readable())
return error("Cannot find linker input '" + File.toString() + "'");
// A user may specify an ar archive without -l, perhaps because it
// is not installed as a library. Detect that and link the library.
if (File.isArchive()) {
if (LinkInArchive(File))
return error("Cannot link archive '" + File.toString() + "'");
} else if (File.isBytecodeFile()) {
verbose("Linking bytecode file '" + File.toString() + "'");
std::auto_ptr<Module> M(LoadObject(File));
if (M.get() == 0)
return error("Cannot load file '" + File.toString() + "'" + Error);
if (LinkInModule(M.get()))
return error("Cannot link file '" + File.toString() + "'" + Error);
verbose("Linked in file '" + File.toString() + "'");
} else {
return warning("File of unknown type '" + File.toString() + "' ignored.");
}
return false;
}
/// LinkFiles - takes a module and a list of files and links them all together.
/// It locates the file either in the current directory, as its absolute
/// or relative pathname, or as a file somewhere in LLVM_LIB_SEARCH_PATH.
///
/// Inputs:
/// Files - A vector of C++ strings indicating the LLVM bytecode filenames
/// to be linked. The names can refer to a mixture of pure LLVM
/// bytecode files and archive (ar) formatted files.
///
/// Outputs:
/// HeadModule - The module will have the specified LLVM bytecode files linked
/// in.
///
/// Return value:
/// FALSE - No errors.
/// TRUE - Some error occurred.
///
bool
Linker::LinkInFiles(const std::vector<sys::Path> &Files)
{
for (unsigned i = 0; i < Files.size(); ++i) {
if (LinkInFile(Files[i]))
return true;
}
return false;
}
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