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//===- lib/Driver/WinLinkDriver.cpp ---------------------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
///
/// Concrete instance of the Driver for Windows link.exe.
///
//===----------------------------------------------------------------------===//
#include "llvm/Option/Arg.h"
#include "llvm/Option/Option.h"
#include "lld/Driver/Driver.h"
#include "lld/ReaderWriter/PECOFFTargetInfo.h"
namespace lld {
namespace {
// Create enum with OPT_xxx values for each option in WinLinkOptions.td
enum WinLinkOpt {
OPT_INVALID = 0,
#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, FLAGS, PARAM, HELP, META) \
OPT_##ID,
#include "WinLinkOptions.inc"
LastOption
#undef OPTION
};
// Create prefix string literals used in WinLinkOptions.td
#define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
#include "WinLinkOptions.inc"
#undef PREFIX
// Create table mapping all options defined in WinLinkOptions.td
static const llvm::opt::OptTable::Info infoTable[] = {
#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, FLAGS, PARAM, \
HELPTEXT, METAVAR) \
{ PREFIX, NAME, HELPTEXT, METAVAR, OPT_##ID, llvm::opt::Option::KIND##Class, \
PARAM, FLAGS, OPT_##GROUP, OPT_##ALIAS },
#include "WinLinkOptions.inc"
#undef OPTION
};
// Create OptTable class for parsing actual command line arguments
class WinLinkOptTable : public llvm::opt::OptTable {
public:
WinLinkOptTable() : OptTable(infoTable, llvm::array_lengthof(infoTable)){}
};
// Returns the index of "--" or -1 if not found.
int findDoubleDash(int argc, const char *argv[]) {
for (int i = 0; i < argc; ++i)
if (std::strcmp(argv[i], "--") == 0)
return i;
return -1;
}
} // namespace
bool WinLinkDriver::linkPECOFF(int argc, const char *argv[],
raw_ostream &diagnostics) {
PECOFFTargetInfo info;
if (parse(argc, argv, info, diagnostics))
return true;
return link(info, diagnostics);
}
bool WinLinkDriver::parse(int argc, const char *argv[],
PECOFFTargetInfo &info, raw_ostream &diagnostics) {
// Arguments after "--" are interpreted as filenames even if they start with
// a hyphen or a slash. This is not compatible with link.exe but useful for
// us to test lld on Unix.
int doubleDashPosition = findDoubleDash(argc, argv);
int argEnd = (doubleDashPosition > 0) ? doubleDashPosition : argc;
// Parse command line options using WinLinkOptions.td
std::unique_ptr<llvm::opt::InputArgList> parsedArgs;
WinLinkOptTable table;
unsigned missingIndex;
unsigned missingCount;
parsedArgs.reset(
table.ParseArgs(&argv[1], &argv[argEnd], missingIndex, missingCount));
if (missingCount) {
diagnostics << "error: missing arg value for '"
<< parsedArgs->getArgString(missingIndex) << "' expected "
<< missingCount << " argument(s).\n";
return true;
}
// Handle -help
if (parsedArgs->getLastArg(OPT_help)) {
table.PrintHelp(llvm::outs(), argv[0], "LLVM Linker", false);
return true;
}
// Copy -mllvm
for (llvm::opt::arg_iterator it = parsedArgs->filtered_begin(OPT_mllvm),
ie = parsedArgs->filtered_end();
it != ie; ++it) {
info.appendLLVMOption((*it)->getValue());
}
// Add input files
for (llvm::opt::arg_iterator it = parsedArgs->filtered_begin(OPT_INPUT),
ie = parsedArgs->filtered_end();
it != ie; ++it) {
info.appendInputFile((*it)->getValue());
}
// Arguments after "--" are also input files
if (doubleDashPosition > 0)
for (int i = doubleDashPosition + 1; i < argc; ++i)
info.appendInputFile(argv[i]);
// Validate the combination of options used.
return info.validate(diagnostics);
}
} // namespace lld