[llvm-commits] CVS: llvm/lib/Linker/Linker.cpp

[Reid Spencer]

Changes in directory llvm/lib/Linker:

Linker.cpp added (r1.1)
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Log message:

This file contains basic Linker facilities needed by all tools

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Diffs of the changes:  (+166 -0)

Index: llvm/lib/Linker/Linker.cpp
diff -c /dev/null llvm/lib/Linker/Linker.cpp:1.1
*** /dev/null	Sun Dec 12 21:00:38 2004
--- llvm/lib/Linker/Linker.cpp	Sun Dec 12 21:00:28 2004
***************
*** 0 ****
--- 1,166 ----
+ //===- lib/Linker/LinkItems.cpp - Link LLVM objects and libraries ---------===//
+ // 
+ //                     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 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/Reader.h"
+ #include <iostream>
+ 
+ using namespace llvm;
+ 
+ Linker::Linker(const std::string& progname, unsigned flags)
+   : Composite(0)
+   , LibPaths()
+   , Flags(flags)
+   , Error()
+   , ProgramName(progname)
+ {
+   Composite = new Module(progname);
+ }
+ 
+ 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) {
+   assert(path.isDirectory() && "Can only insert directories into the 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.setDirectory(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;
+   Composite = new Module(ProgramName);
+   LibPaths.clear();
+   Error.clear();
+   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>();
+ }
+ 
+ static inline sys::Path IsLibrary(const std::string& Name, 
+                                   const sys::Path& Directory) {
+ 
+   assert(Directory.isDirectory() && "Need to specify a directory");
+   sys::Path FullPath(Directory);
+   FullPath.appendFile("lib" + Name);
+ 
+   FullPath.appendSuffix("a");
+   if (FullPath.isArchive())
+     return FullPath;
+ 
+   FullPath.elideSuffix();
+   FullPath.appendSuffix("bca");
+   if (FullPath.isArchive())
+     return FullPath;
+ 
+   FullPath.elideSuffix();
+   FullPath.appendSuffix(&(LTDL_SHLIB_EXT[1]));
+   if (FullPath.isDynamicLibrary())
+     return FullPath;
+ 
+   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 Paths and the directory
+ /// named by the value of the environment variable LLVM_LIB_SEARCH_PATH. Returns
+ /// an empty string 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.readable() && 
+       (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();
+ }