//
// 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 is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/Linker.h"
#include "llvm/Module.h"
-
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/system_error.h"
using namespace llvm;
// LinkItems - This function is the main entry point into linking. It takes a
/// LinkInLibrary - links one library into the HeadModule.
///
-bool Linker::LinkInLibrary(const std::string& Lib, bool& is_native) {
+bool Linker::LinkInLibrary(StringRef Lib, bool& is_native) {
is_native = false;
// Determine where this library lives.
sys::Path Pathname = FindLib(Lib);
if (Pathname.isEmpty())
- return warning("Cannot find library '" + Lib + "'");
+ return error("Cannot find library '" + Lib.str() + "'");
// If its an archive, try to link it in
std::string Magic;
Pathname.getMagicNumber(Magic, 64);
switch (sys::IdentifyFileType(Magic.c_str(), 64)) {
- default: assert(0 && "Bad file type identification");
+ default: llvm_unreachable("Bad file type identification");
case sys::Unknown_FileType:
- return warning("Supposed library '" + Lib + "' isn't a library.");
+ return warning("Supposed library '" + Lib.str() + "' isn't a library.");
- case sys::Bytecode_FileType:
case sys::Bitcode_FileType:
- case sys::CompressedBytecode_FileType:
// LLVM ".so" file.
if (LinkInFile(Pathname, is_native))
- return error("Cannot link file '" + Pathname.toString() + "'");
+ return true;
break;
case sys::Archive_FileType:
if (LinkInArchive(Pathname, is_native))
- return error("Cannot link archive '" + Pathname.toString() + "'");
+ return error("Cannot link archive '" + Pathname.str() + "'");
break;
case sys::ELF_Relocatable_FileType:
///
bool Linker::LinkInFile(const sys::Path &File, bool &is_native) {
is_native = false;
- // Make sure we can at least read the file
- if (!File.canRead())
- return error("Cannot find linker input '" + File.toString() + "'");
+
+ // Check for a file of name "-", which means "read standard input"
+ if (File.str() == "-") {
+ std::auto_ptr<Module> M;
+ OwningPtr<MemoryBuffer> Buffer;
+ error_code ec;
+ if (!(ec = MemoryBuffer::getSTDIN(Buffer))) {
+ if (!Buffer->getBufferSize()) {
+ Error = "standard input is empty";
+ } else {
+ M.reset(ParseBitcodeFile(Buffer.get(), Context, &Error));
+ if (M.get())
+ if (!LinkInModule(M.get(), &Error))
+ return false;
+ }
+ }
+ return error("Cannot link stdin: " + ec.message());
+ }
- // If its an archive, try to link it in
+ // Determine what variety of file it is.
std::string Magic;
- File.getMagicNumber(Magic, 64);
+ if (!File.getMagicNumber(Magic, 64))
+ return error("Cannot find linker input '" + File.str() + "'");
+
switch (sys::IdentifyFileType(Magic.c_str(), 64)) {
- default: assert(0 && "Bad file type identification");
+ default: llvm_unreachable("Bad file type identification");
case sys::Unknown_FileType:
- return warning("Supposed object file '" + File.toString() +
- "' not recognized as such");
+ return warning("Ignoring file '" + File.str() +
+ "' because does not contain bitcode.");
case sys::Archive_FileType:
// A user may specify an ar archive without -l, perhaps because it
// is not installed as a library. Detect that and link the archive.
- verbose("Linking archive file '" + File.toString() + "'");
if (LinkInArchive(File, is_native))
- return error("Cannot link archive '" + File.toString() + "'");
+ return true;
break;
- case sys::Bitcode_FileType:
- case sys::Bytecode_FileType:
- case sys::CompressedBytecode_FileType: {
- verbose("Linking bitcode file '" + File.toString() + "'");
+ case sys::Bitcode_FileType: {
+ verbose("Linking bitcode file '" + File.str() + "'");
std::auto_ptr<Module> M(LoadObject(File));
if (M.get() == 0)
- return error("Cannot load file '" + File.toString() + "'" + Error);
- if (LinkInModule(M.get()))
- return error("Cannot link file '" + File.toString() + "'" + Error);
+ return error("Cannot load file '" + File.str() + "': " + Error);
+ if (LinkInModule(M.get(), &Error))
+ return error("Cannot link file '" + File.str() + "': " + Error);
- verbose("Linked in file '" + File.toString() + "'");
+ verbose("Linked in file '" + File.str() + "'");
break;
}