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"
17 #include "llvm/Config/config.h"
22 Linker::Linker(const std::string& progname, const std::string& modname, unsigned flags)
27 , ProgramName(progname)
29 Composite = new Module(modname);
32 Linker::Linker(const std::string& progname, Module* aModule, unsigned flags)
37 , ProgramName(progname)
46 Linker::error(const std::string& message) {
48 if (!(Flags&QuietErrors)) {
49 std::cerr << ProgramName << ": error: " << message << "\n";
55 Linker::warning(const std::string& message) {
57 if (!(Flags&QuietErrors)) {
58 std::cerr << ProgramName << ": warning: " << message << "\n";
64 Linker::verbose(const std::string& message) {
66 std::cerr << " " << message << "\n";
71 Linker::addPath(const sys::Path& path) {
72 LibPaths.push_back(path);
76 Linker::addPaths(const std::vector<std::string>& paths) {
77 for (unsigned i = 0; i != paths.size(); ++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 sys::Path FullPath(Directory);
122 // Make sure the directory actually is a directory in the file system.
123 if (FullPath.isDirectory())
125 // Try the libX.a form
126 FullPath.appendComponent("lib" + Name);
127 FullPath.appendSuffix("a");
128 if (FullPath.isArchive())
131 // Try the libX.bca form
132 FullPath.eraseSuffix();
133 FullPath.appendSuffix("bca");
134 if (FullPath.isArchive())
137 // Try the libX.so form
138 FullPath.eraseSuffix();
139 FullPath.appendSuffix(&(LTDL_SHLIB_EXT[1]));
140 if (FullPath.isDynamicLibrary()) // Native shared library?
142 if (FullPath.isBytecodeFile()) // .so file containing bytecode?
145 // Not found .. fall through
148 // Indicate that the library was not found in the directory.
153 /// FindLib - Try to convert Filename into the name of a file that we can open,
154 /// if it does not already name a file we can open, by first trying to open
155 /// Filename, then libFilename.[suffix] for each of a set of several common
156 /// library suffixes, in each of the directories in LibPaths. Returns an empty
157 /// Path if no matching file can be found.
160 Linker::FindLib(const std::string &Filename)
162 // Determine if the pathname can be found as it stands.
163 sys::Path FilePath(Filename);
164 if (FilePath.canRead() &&
165 (FilePath.isArchive() || FilePath.isDynamicLibrary()))
168 // Iterate over the directories in Paths to see if we can find the library
170 for (unsigned Index = 0; Index != LibPaths.size(); ++Index) {
171 sys::Path Directory(LibPaths[Index]);
172 sys::Path FullPath = IsLibrary(Filename,Directory);
173 if (!FullPath.isEmpty())