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