llvm-project/lld/ELF/DriverUtils.cpp

65 lines
2.2 KiB
C++
Raw Normal View History

//===- DriverUtils.cpp ----------------------------------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains utility functions for the driver. Because there
// are so many small functions, we created this separate file to make
// Driver.cpp less cluttered.
//
//===----------------------------------------------------------------------===//
#include "Driver.h"
#include "Error.h"
#include "llvm/ADT/STLExtras.h"
using namespace llvm;
using namespace lld;
using namespace lld::elf2;
// Create OptTable
// Create prefix string literals used in Options.td
#define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
#include "Options.inc"
#undef PREFIX
// Create table mapping all options defined in Options.td
static const opt::OptTable::Info infoTable[] = {
#define OPTION(X1, X2, ID, KIND, GROUP, ALIAS, X6, X7, X8, X9, X10) \
{ \
X1, X2, X9, X10, OPT_##ID, opt::Option::KIND##Class, X8, X7, OPT_##GROUP, \
OPT_##ALIAS, X6 \
} \
,
#include "Options.inc"
#undef OPTION
};
class ELFOptTable : public opt::OptTable {
public:
ELFOptTable() : OptTable(infoTable, array_lengthof(infoTable)) {}
};
// Parses a given list of options.
opt::InputArgList ArgParser::parse(ArrayRef<const char *> Argv) {
// Make InputArgList from string vectors.
ELFOptTable Table;
unsigned MissingIndex;
unsigned MissingCount;
opt::InputArgList Args = Table.ParseArgs(Argv, MissingIndex, MissingCount);
if (MissingCount)
error(Twine("missing arg value for \"") + Args.getArgString(MissingIndex) +
"\", expected " + Twine(MissingCount) +
(MissingCount == 1 ? " argument.\n" : " arguments"));
for (auto *Arg : Args.filtered(OPT_UNKNOWN))
error(Twine("unknown argument: ") + Arg->getSpelling());
return Args;
}