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//===- LibDriver.cpp - lib.exe-compatible driver --------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Defines an interface to a lib.exe-compatible driver that also understands
// bitcode files. Used by llvm-lib and lld-link2 /lib.
//
//===----------------------------------------------------------------------===//
#include "llvm/LibDriver/LibDriver.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Object/ArchiveWriter.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/StringSaver.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
namespace {
enum {
OPT_INVALID = 0,
#define OPTION(_1, _2, ID, _4, _5, _6, _7, _8, _9, _10, _11) OPT_##ID,
#include "Options.inc"
#undef OPTION
};
#define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
#include "Options.inc"
#undef PREFIX
static const llvm::opt::OptTable::Info infoTable[] = {
#define OPTION(X1, X2, ID, KIND, GROUP, ALIAS, X6, X7, X8, X9, X10) \
{ \
X1, X2, X9, X10, OPT_##ID, llvm::opt::Option::KIND##Class, X8, X7, \
OPT_##GROUP, OPT_##ALIAS, X6 \
},
#include "Options.inc"
#undef OPTION
};
class LibOptTable : public llvm::opt::OptTable {
public:
LibOptTable() : OptTable(infoTable, llvm::array_lengthof(infoTable), true) {}
};
}
static std::string getOutputPath(llvm::opt::InputArgList *Args,
const llvm::NewArchiveIterator &FirstMember) {
if (auto *Arg = Args->getLastArg(OPT_out))
return Arg->getValue();
SmallString<128> Val = FirstMember.getNew();
llvm::sys::path::replace_extension(Val, ".lib");
return Val.str();
}
static std::vector<StringRef> getSearchPaths(llvm::opt::InputArgList *Args,
StringSaver &Saver) {
std::vector<StringRef> Ret;
// Add current directory as first item of the search path.
Ret.push_back("");
// Add /libpath flags.
for (auto *Arg : Args->filtered(OPT_libpath))
Ret.push_back(Arg->getValue());
// Add $LIB.
Optional<std::string> EnvOpt = sys::Process::GetEnv("LIB");
if (!EnvOpt.hasValue())
return Ret;
StringRef Env = Saver.save(*EnvOpt);
while (!Env.empty()) {
StringRef Path;
std::tie(Path, Env) = Env.split(';');
Ret.push_back(Path);
}
return Ret;
}
static Optional<std::string> findInputFile(StringRef File,
ArrayRef<StringRef> Paths) {
for (auto Dir : Paths) {
SmallString<128> Path = Dir;
sys::path::append(Path, File);
if (sys::fs::exists(Path))
return Path.str().str();
}
return Optional<std::string>();
}
int llvm::libDriverMain(llvm::ArrayRef<const char*> ArgsArr) {
SmallVector<const char *, 20> NewArgs(ArgsArr.begin(), ArgsArr.end());
BumpPtrAllocator Alloc;
BumpPtrStringSaver Saver(Alloc);
cl::ExpandResponseFiles(Saver, cl::TokenizeWindowsCommandLine, NewArgs);
ArgsArr = NewArgs;
LibOptTable Table;
unsigned MissingIndex;
unsigned MissingCount;
llvm::opt::InputArgList Args =
Table.ParseArgs(ArgsArr.slice(1), MissingIndex, MissingCount);
if (MissingCount) {
llvm::errs() << "missing arg value for \""
<< Args.getArgString(MissingIndex) << "\", expected "
<< MissingCount
<< (MissingCount == 1 ? " argument.\n" : " arguments.\n");
return 1;
}
for (auto *Arg : Args.filtered(OPT_UNKNOWN))
llvm::errs() << "ignoring unknown argument: " << Arg->getSpelling() << "\n";
if (Args.filtered_begin(OPT_INPUT) == Args.filtered_end()) {
llvm::errs() << "no input files.\n";
return 1;
}
std::vector<StringRef> SearchPaths = getSearchPaths(&Args, Saver);
std::vector<llvm::NewArchiveIterator> Members;
for (auto *Arg : Args.filtered(OPT_INPUT)) {
Optional<std::string> Path = findInputFile(Arg->getValue(), SearchPaths);
if (!Path.hasValue()) {
llvm::errs() << Arg->getValue() << ": no such file or directory\n";
return 1;
}
Members.emplace_back(Saver.save(*Path),
llvm::sys::path::filename(Arg->getValue()));
}
std::pair<StringRef, std::error_code> Result =
llvm::writeArchive(getOutputPath(&Args, Members[0]), Members,
/*WriteSymtab=*/true, object::Archive::K_GNU,
/*Deterministic*/ true);
if (Result.second) {
if (Result.first.empty())
Result.first = ArgsArr[0];
llvm::errs() << Result.first << ": " << Result.second.message() << "\n";
return 1;
}
return 0;
}
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