forked from OSchip/llvm-project
107 lines
3.5 KiB
C++
107 lines
3.5 KiB
C++
//===- lib/Linker/LinkItems.cpp - Link LLVM objects and libraries ---------===//
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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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// and to handle annoying things like static libraries.
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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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// LinkItems - preserve link order for an arbitrary set of linkage items.
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bool
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Linker::LinkInItems(const ItemList& Items) {
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// For each linkage item ...
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for (ItemList::const_iterator I = Items.begin(), E = Items.end();
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I != E; ++I) {
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if (I->second) {
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// Link in the library suggested.
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if (LinkInLibrary(I->first))
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return true;
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} else {
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if (LinkInFile(sys::Path(I->first)))
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return true;
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}
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}
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// At this point we have processed all the link items provided to us. Since
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// we have an aggregated module at this point, the dependent libraries in
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// that module should also be aggregated with duplicates eliminated. This is
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// now the time to process the dependent libraries to resolve any remaining
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// symbols.
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const Module::LibraryListType& DepLibs = Composite->getLibraries();
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for (Module::LibraryListType::const_iterator I = DepLibs.begin(),
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E = DepLibs.end(); I != E; ++I) {
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if(LinkInLibrary(*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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/// LinkInLibrary - links one library into the HeadModule.
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///
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bool Linker::LinkInLibrary(const std::string& Lib) {
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// Determine where this library lives.
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sys::Path Pathname = FindLib(Lib);
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if (Pathname.isEmpty())
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return warning("Cannot find library '" + Lib + "'");
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// If its an archive, try to link it in
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if (Pathname.isArchive()) {
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if (LinkInArchive(Pathname))
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return error("Cannot link archive '" + Pathname.toString() + "'");
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} else if (Pathname.isBytecodeFile()) {
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// LLVM ".so" file.
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if (LinkInFile(Pathname))
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return error("Cannot link file '" + Pathname.toString() + "'");
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} else if (Pathname.isDynamicLibrary()) {
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return warning("Library '" + Lib + "' is a native dynamic library.");
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} else {
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return warning("Supposed library '" + Lib + "' isn't a library.");
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}
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return false;
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}
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/// LinkLibraries - takes the specified library files and links them into the
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/// main bytecode object file.
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///
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/// Inputs:
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/// Libraries - The list of libraries to link into the module.
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///
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/// Return value:
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/// FALSE - No error.
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/// TRUE - Error.
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///
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bool Linker::LinkInLibraries(const std::vector<std::string> &Libraries) {
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// Process the set of libraries we've been provided.
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for (unsigned i = 0; i < Libraries.size(); ++i)
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if (LinkInLibrary(Libraries[i]))
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return true;
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// At this point we have processed all the libraries provided to us. Since
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// we have an aggregated module at this point, the dependent libraries in
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// that module should also be aggregated with duplicates eliminated. This is
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// now the time to process the dependent libraries to resolve any remaining
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// symbols.
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const Module::LibraryListType& DepLibs = Composite->getLibraries();
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for (Module::LibraryListType::const_iterator I = DepLibs.begin(),
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E = DepLibs.end(); I != E; ++I)
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if (LinkInLibrary(*I))
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return true;
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return false;
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}
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