1 //===- lib/Linker/Linker.cpp - Basic Linker functionality ----------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Reid Spencer and is distributed under the
6 // University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains basic Linker functionality that all usages will need.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Linker.h"
15 #include "llvm/Module.h"
16 #include "llvm/Bytecode/Reader.h"
21 Linker::Linker(const std::string& progname, unsigned flags)
26 , ProgramName(progname)
28 Composite = new Module(progname);
31 Linker::Linker(const std::string& progname, Module* aModule, unsigned flags)
36 , ProgramName(progname)
45 Linker::error(const std::string& message) {
47 if (!(Flags&QuietErrors)) {
48 std::cerr << ProgramName << ": error: " << message << "\n";
54 Linker::warning(const std::string& message) {
56 if (!(Flags&QuietErrors)) {
57 std::cerr << ProgramName << ": warning: " << message << "\n";
63 Linker::verbose(const std::string& message) {
65 std::cerr << " " << message << "\n";
70 Linker::addPath(const sys::Path& path) {
71 assert(path.isDirectory() && "Can only insert directories into the path");
72 LibPaths.push_back(path);
76 Linker::addPaths(const std::vector<std::string>& paths) {
77 for (unsigned i = 0; i != paths.size(); ++i) {
79 aPath.setDirectory(paths[i]);
80 LibPaths.push_back(aPath);
85 Linker::addSystemPaths() {
86 sys::Path::GetBytecodeLibraryPaths(LibPaths);
87 LibPaths.insert(LibPaths.begin(),sys::Path("./"));
91 Linker::releaseModule() {
92 Module* result = Composite;
100 // LoadObject - Read in and parse the bytecode file named by FN and return the
101 // module it contains (wrapped in an auto_ptr), or auto_ptr<Module>() and set
102 // Error if an error occurs.
103 std::auto_ptr<Module>
104 Linker::LoadObject(const sys::Path &FN) {
105 std::string ParseErrorMessage;
106 Module *Result = ParseBytecodeFile(FN.toString(), &ParseErrorMessage);
108 return std::auto_ptr<Module>(Result);
109 Error = "Bytecode file '" + FN.toString() + "' could not be loaded";
110 if (ParseErrorMessage.size())
111 Error += ": " + ParseErrorMessage;
112 return std::auto_ptr<Module>();
115 // IsLibrary - Determine if "Name" is a library in "Directory". Return
116 // a non-empty sys::Path if its found, an empty one otherwise.
117 static inline sys::Path IsLibrary(const std::string& Name,
118 const sys::Path& Directory) {
120 assert(Directory.isDirectory() && "Need to specify a directory");
121 sys::Path FullPath(Directory);
122 FullPath.appendFile("lib" + Name);
124 FullPath.appendSuffix("a");
125 if (FullPath.isArchive())
128 FullPath.elideSuffix();
129 FullPath.appendSuffix("bca");
130 if (FullPath.isArchive())
133 FullPath.elideSuffix();
134 FullPath.appendSuffix(&(LTDL_SHLIB_EXT[1]));
135 if (FullPath.isDynamicLibrary())
142 /// FindLib - Try to convert Filename into the name of a file that we can open,
143 /// if it does not already name a file we can open, by first trying to open
144 /// Filename, then libFilename.[suffix] for each of a set of several common
145 /// library suffixes, in each of the directories in LibPaths. Returns an empty
146 /// Path if no matching file can be found.
149 Linker::FindLib(const std::string &Filename)
151 // Determine if the pathname can be found as it stands.
152 sys::Path FilePath(Filename);
153 if (FilePath.readable() &&
154 (FilePath.isArchive() || FilePath.isDynamicLibrary()))
157 // Iterate over the directories in Paths to see if we can find the library
159 for (unsigned Index = 0; Index != LibPaths.size(); ++Index) {
160 sys::Path Directory(LibPaths[Index]);
161 sys::Path FullPath = IsLibrary(Filename,Directory);
162 if (!FullPath.isEmpty())