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//===-- llvm-libtool-darwin.cpp - a tool for creating libraries -----------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// A utility for creating static and dynamic libraries for Darwin.
//
//===----------------------------------------------------------------------===//
#include "llvm/BinaryFormat/Magic.h"
#include "llvm/Object/ArchiveWriter.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/LineIterator.h"
#include "llvm/Support/WithColor.h"
using namespace llvm;
using namespace llvm::object;
cl::OptionCategory LibtoolCategory("llvm-libtool-darwin Options");
static cl::opt<std::string> OutputFile("o", cl::desc("Specify output filename"),
cl::value_desc("filename"), cl::Required,
cl::cat(LibtoolCategory));
static cl::list<std::string> InputFiles(cl::Positional,
cl::desc("<input files>"),
cl::ZeroOrMore,
cl::cat(LibtoolCategory));
enum class Operation { Static };
static cl::opt<Operation> LibraryOperation(
cl::desc("Library Type: "),
cl::values(
clEnumValN(Operation::Static, "static",
"Produce a statically linked library from the input files")),
cl::Required, cl::cat(LibtoolCategory));
static cl::opt<std::string>
FileList("filelist",
cl::desc("Pass in file containing a list of filenames"),
cl::value_desc("listfile[,dirname]"), cl::cat(LibtoolCategory));
static Error processFileList() {
StringRef FileName, DirName;
std::tie(FileName, DirName) = StringRef(FileList).rsplit(",");
ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
MemoryBuffer::getFileOrSTDIN(FileName, /*FileSize=*/-1,
/*RequiresNullTerminator=*/false);
if (std::error_code EC = FileOrErr.getError())
return createFileError(FileName, errorCodeToError(EC));
const MemoryBuffer &Ref = *FileOrErr.get();
line_iterator I(Ref, /*SkipBlanks=*/false);
if (I.is_at_eof())
return createStringError(std::errc::invalid_argument,
"file list file: '%s' is empty",
FileName.str().c_str());
for (; !I.is_at_eof(); ++I) {
StringRef Line = *I;
if (Line.empty())
return createStringError(std::errc::invalid_argument,
"file list file: '%s': filename cannot be empty",
FileName.str().c_str());
SmallString<128> Path;
if (!DirName.empty())
sys::path::append(Path, DirName, Line);
else
sys::path::append(Path, Line);
InputFiles.push_back(static_cast<std::string>(Path));
}
return Error::success();
}
static Error verifyMachOObject(const NewArchiveMember &Member) {
auto MBRef = Member.Buf->getMemBufferRef();
Expected<std::unique_ptr<object::ObjectFile>> ObjOrErr =
object::ObjectFile::createObjectFile(MBRef);
// Throw error if not a valid object file.
if (!ObjOrErr)
return createFileError(Member.MemberName, ObjOrErr.takeError());
// Throw error if not in Mach-O format.
if (!isa<object::MachOObjectFile>(**ObjOrErr))
return createStringError(std::errc::invalid_argument,
"'%s': format not supported",
Member.MemberName.data());
return Error::success();
}
static Error addChildMember(std::vector<NewArchiveMember> &Members,
const object::Archive::Child &M) {
Expected<NewArchiveMember> NMOrErr =
NewArchiveMember::getOldMember(M, /*Deterministic=*/true);
if (!NMOrErr)
return NMOrErr.takeError();
// Verify that Member is a Mach-O object file.
if (Error E = verifyMachOObject(*NMOrErr))
return E;
Members.push_back(std::move(*NMOrErr));
return Error::success();
}
static Error
addMember(std::vector<NewArchiveMember> &Members, StringRef FileName,
std::vector<std::unique_ptr<MemoryBuffer>> &ArchiveBuffers) {
Expected<NewArchiveMember> NMOrErr =
NewArchiveMember::getFile(FileName, /*Deterministic=*/true);
if (!NMOrErr)
return createFileError(FileName, NMOrErr.takeError());
// For regular archives, use the basename of the object path for the member
// name.
NMOrErr->MemberName = sys::path::filename(NMOrErr->MemberName);
// Flatten archives.
if (identify_magic(NMOrErr->Buf->getBuffer()) == file_magic::archive) {
Expected<std::unique_ptr<Archive>> LibOrErr =
object::Archive::create(NMOrErr->Buf->getMemBufferRef());
if (!LibOrErr)
return createFileError(FileName, LibOrErr.takeError());
object::Archive &Lib = **LibOrErr;
Error Err = Error::success();
for (const object::Archive::Child &Child : Lib.children(Err))
if (Error E = addChildMember(Members, Child))
return createFileError(FileName, std::move(E));
if (Err)
return createFileError(FileName, std::move(Err));
// Update vector ArchiveBuffers with the MemoryBuffers to transfer
// ownership.
ArchiveBuffers.push_back(std::move(NMOrErr->Buf));
return Error::success();
}
// Verify that Member is a Mach-O object file.
if (Error E = verifyMachOObject(*NMOrErr))
return E;
Members.push_back(std::move(*NMOrErr));
return Error::success();
}
static Error createStaticLibrary() {
std::vector<NewArchiveMember> NewMembers;
std::vector<std::unique_ptr<MemoryBuffer>> ArchiveBuffers;
for (StringRef Member : InputFiles)
if (Error E = addMember(NewMembers, Member, ArchiveBuffers))
return E;
if (Error E = writeArchive(OutputFile, NewMembers,
/*WriteSymtab=*/true,
/*Kind=*/object::Archive::K_DARWIN,
/*Deterministic=*/true,
/*Thin=*/false))
return E;
return Error::success();
}
int main(int Argc, char **Argv) {
InitLLVM X(Argc, Argv);
cl::HideUnrelatedOptions({&LibtoolCategory, &ColorCategory});
cl::ParseCommandLineOptions(Argc, Argv, "llvm-libtool-darwin\n");
if (!FileList.empty()) {
if (Error E = processFileList()) {
WithColor::defaultErrorHandler(std::move(E));
return EXIT_FAILURE;
}
}
if (InputFiles.empty()) {
Error E = createStringError(std::errc::invalid_argument,
"no input files specified");
WithColor::defaultErrorHandler(std::move(E));
return EXIT_FAILURE;
}
switch (LibraryOperation) {
case Operation::Static:
if (Error E = createStaticLibrary()) {
WithColor::defaultErrorHandler(std::move(E));
return EXIT_FAILURE;
}
break;
}
}
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