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