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//===- MinGW/Driver.cpp ---------------------------------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// GNU ld style linker driver for COFF currently supporting mingw-w64.
///
//===----------------------------------------------------------------------===//
#include "lld/Common/Driver.h"
#include "lld/Common/ErrorHandler.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#if !defined(_MSC_VER) && !defined(__MINGW32__)
#include <unistd.h>
#endif
using namespace lld;
using namespace llvm;
// Create OptTable
enum {
OPT_INVALID = 0,
#define OPTION(_1, _2, ID, _4, _5, _6, _7, _8, _9, _10, _11, _12) OPT_##ID,
#include "Options.inc"
#undef OPTION
};
// Create prefix string literals used in Options.td
#define PREFIX(NAME, VALUE) static 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, X7, X8, X9, X10, X11, X12) \
{X1, X2, X10, X11, OPT_##ID, opt::Option::KIND##Class, \
X9, X8, OPT_##GROUP, OPT_##ALIAS, X7, X12},
#include "Options.inc"
#undef OPTION
};
namespace {
class MinGWOptTable : public opt::OptTable {
public:
MinGWOptTable() : OptTable(InfoTable, false) {}
opt::InputArgList parse(ArrayRef<const char *> Argv);
};
} // namespace
opt::InputArgList MinGWOptTable::parse(ArrayRef<const char *> Argv) {
unsigned MissingIndex;
unsigned MissingCount;
SmallVector<const char *, 256> Vec(Argv.data(), Argv.data() + Argv.size());
opt::InputArgList Args = this->ParseArgs(Vec, MissingIndex, MissingCount);
if (MissingCount)
fatal(StringRef(Args.getArgString(MissingIndex)) + ": missing argument");
for (auto *Arg : Args.filtered(OPT_UNKNOWN))
fatal("unknown argument: " + Arg->getSpelling());
if (!Args.hasArg(OPT_INPUT) && !Args.hasArg(OPT_l))
fatal("no input files");
return Args;
}
// Find a file by concatenating given paths.
static Optional<std::string> findFile(StringRef Path1, const Twine &Path2) {
SmallString<128> S;
sys::path::append(S, Path1, Path2);
if (sys::fs::exists(S))
return S.str().str();
return None;
}
// This is for -lfoo. We'll look for libfoo.dll.a or libfoo.a from search paths.
static std::string
searchLibrary(StringRef Name, ArrayRef<StringRef> SearchPaths, bool BStatic) {
if (Name.startswith(":")) {
for (StringRef Dir : SearchPaths)
if (Optional<std::string> S = findFile(Dir, Name.substr(1)))
return *S;
fatal("unable to find library -l" + Name);
}
for (StringRef Dir : SearchPaths) {
if (!BStatic)
if (Optional<std::string> S = findFile(Dir, "lib" + Name + ".dll.a"))
return *S;
if (Optional<std::string> S = findFile(Dir, "lib" + Name + ".a"))
return *S;
}
fatal("unable to find library -l" + Name);
}
// Convert Unix-ish command line arguments to Windows-ish ones and
// then call coff::link.
bool mingw::link(ArrayRef<const char *> ArgsArr, raw_ostream &Diag) {
MinGWOptTable Parser;
opt::InputArgList Args = Parser.parse(ArgsArr.slice(1));
std::vector<std::string> LinkArgs;
auto Add = [&](const Twine &S) { LinkArgs.push_back(S.str()); };
Add("lld-link");
Add("-lldmingw");
if (auto *A = Args.getLastArg(OPT_entry)) {
StringRef S = A->getValue();
if (Args.getLastArgValue(OPT_m) == "i386pe" && S.startswith("_"))
Add("-entry:" + S.substr(1));
else
Add("-entry:" + S);
}
if (auto *A = Args.getLastArg(OPT_subs))
Add("-subsystem:" + StringRef(A->getValue()));
if (auto *A = Args.getLastArg(OPT_out_implib))
Add("-implib:" + StringRef(A->getValue()));
if (auto *A = Args.getLastArg(OPT_stack))
Add("-stack:" + StringRef(A->getValue()));
if (auto *A = Args.getLastArg(OPT_output_def))
Add("-output-def:" + StringRef(A->getValue()));
if (auto *A = Args.getLastArg(OPT_image_base))
Add("-base:" + StringRef(A->getValue()));
if (auto *A = Args.getLastArg(OPT_o))
Add("-out:" + StringRef(A->getValue()));
else if (Args.hasArg(OPT_shared))
Add("-out:a.dll");
else
Add("-out:a.exe");
if (Args.hasArg(OPT_shared))
Add("-dll");
if (Args.hasArg(OPT_verbose))
Add("-verbose");
if (Args.hasArg(OPT_export_all_symbols))
Add("-export-all-symbols");
if (!Args.hasArg(OPT_strip_all))
Add("-debug:dwarf");
if (Args.hasArg(OPT_large_address_aware))
Add("-largeaddressaware");
if (Args.getLastArgValue(OPT_m) != "thumb2pe" &&
Args.getLastArgValue(OPT_m) != "arm64pe" && !Args.hasArg(OPT_dynamicbase))
Add("-dynamicbase:no");
if (Args.hasFlag(OPT_gc_sections, OPT_no_gc_sections, false))
Add("-opt:ref");
else
Add("-opt:noref");
if (auto *A = Args.getLastArg(OPT_icf)) {
StringRef S = A->getValue();
if (S == "all")
Add("-opt:icf");
else if (S == "safe" || S == "none")
Add("-opt:noicf");
else
fatal("unknown parameter: --icf=" + S);
} else {
Add("-opt:noicf");
}
if (auto *A = Args.getLastArg(OPT_m)) {
StringRef S = A->getValue();
if (S == "i386pe")
Add("-machine:x86");
else if (S == "i386pep")
Add("-machine:x64");
else if (S == "thumb2pe")
Add("-machine:arm");
else if (S == "arm64pe")
Add("-machine:arm64");
else
fatal("unknown parameter: -m" + S);
}
for (auto *A : Args.filtered(OPT_mllvm))
Add("-mllvm:" + StringRef(A->getValue()));
for (auto *A : Args.filtered(OPT_Xlink))
Add(A->getValue());
if (Args.getLastArgValue(OPT_m) == "i386pe")
Add("-alternatename:__image_base__=___ImageBase");
else
Add("-alternatename:__image_base__=__ImageBase");
std::vector<StringRef> SearchPaths;
for (auto *A : Args.filtered(OPT_L))
SearchPaths.push_back(A->getValue());
StringRef Prefix = "";
bool Static = false;
for (auto *A : Args) {
switch (A->getOption().getUnaliasedOption().getID()) {
case OPT_INPUT:
if (StringRef(A->getValue()).endswith_lower(".def"))
Add("-def:" + StringRef(A->getValue()));
else
Add(Prefix + StringRef(A->getValue()));
break;
case OPT_l:
Add(Prefix + searchLibrary(A->getValue(), SearchPaths, Static));
break;
case OPT_whole_archive:
Prefix = "-wholearchive:";
break;
case OPT_no_whole_archive:
Prefix = "";
break;
case OPT_Bstatic:
Static = true;
break;
case OPT_Bdynamic:
Static = false;
break;
}
}
if (Args.hasArg(OPT_verbose) || Args.hasArg(OPT__HASH_HASH_HASH))
outs() << llvm::join(LinkArgs, " ") << "\n";
if (Args.hasArg(OPT__HASH_HASH_HASH))
return true;
// Repack vector of strings to vector of const char pointers for coff::link.
std::vector<const char *> Vec;
for (const std::string &S : LinkArgs)
Vec.push_back(S.c_str());
return coff::link(Vec, true);
}
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