static int linkObjToBinaryGcc(bool sharedLib)
{
Logger::println("*** Linking executable ***");
// find gcc for linking
std::string gcc(getGcc());
// build arguments
std::vector<std::string> args;
// object files
for (unsigned i = 0; i < global.params.objfiles->dim; i++)
{
const char *p = static_cast<const char *>(global.params.objfiles->data[i]);
args.push_back(p);
}
// user libs
for (unsigned i = 0; i < global.params.libfiles->dim; i++)
{
const char *p = static_cast<const char *>(global.params.libfiles->data[i]);
args.push_back(p);
}
// output filename
std::string output = getOutputName(sharedLib);
if (sharedLib)
args.push_back("-shared");
args.push_back("-o");
args.push_back(output);
// set the global gExePath
gExePath = output;
//assert(gExePath.isValid());
// create path to exe
CreateDirectoryOnDisk(gExePath);
#if LDC_LLVM_VER >= 303
// Pass sanitizer arguments to linker. Requires clang.
if (opts::sanitize == opts::AddressSanitizer) {
args.push_back("-fsanitize=address");
}
if (opts::sanitize == opts::MemorySanitizer) {
args.push_back("-fsanitize=memory");
}
if (opts::sanitize == opts::ThreadSanitizer) {
args.push_back("-fsanitize=thread");
}
#endif
// additional linker switches
for (unsigned i = 0; i < global.params.linkswitches->dim; i++)
{
const char *p = static_cast<const char *>(global.params.linkswitches->data[i]);
// Don't push -l and -L switches using -Xlinker, but pass them indirectly
// via GCC. This makes sure user-defined paths take precedence over
// GCC's builtin LIBRARY_PATHs.
if (!p[0] || !(p[0] == '-' && (p[1] == 'l' || p[1] == 'L')))
args.push_back("-Xlinker");
args.push_back(p);
}
// default libs
bool addSoname = false;
switch (global.params.targetTriple.getOS()) {
case llvm::Triple::Linux:
addSoname = true;
args.push_back("-lrt");
if (!opts::disableLinkerStripDead) {
args.push_back("-Wl,--gc-sections");
}
// fallthrough
case llvm::Triple::Darwin:
case llvm::Triple::MacOSX:
args.push_back("-ldl");
// fallthrough
case llvm::Triple::FreeBSD:
addSoname = true;
args.push_back("-lpthread");
args.push_back("-lm");
break;
case llvm::Triple::Solaris:
args.push_back("-lm");
args.push_back("-lumem");
// solaris TODO
break;
#if LDC_LLVM_VER < 305
case llvm::Triple::MinGW32:
// This is really more of a kludge, as linking in the Winsock functions
// should be handled by the pragma(lib, ...) in std.socket, but it
// makes LDC behave as expected for now.
args.push_back("-lws2_32");
break;
#endif
default:
// OS not yet handled, will probably lead to linker errors.
// FIXME: Win32.
break;
}
#if LDC_LLVM_VER >= 305
if (global.params.targetTriple.isWindowsGNUEnvironment())
{
// This is really more of a kludge, as linking in the Winsock functions
// should be handled by the pragma(lib, ...) in std.socket, but it
// makes LDC behave as expected for now.
args.push_back("-lws2_32");
}
#endif
// Only specify -m32/-m64 for architectures where the two variants actually
// exist (as e.g. the GCC ARM toolchain doesn't recognize the switches).
// MIPS does not have -m32/-m64 but requires -mabi=.
if (global.params.targetTriple.get64BitArchVariant().getArch() !=
llvm::Triple::UnknownArch &&
global.params.targetTriple.get32BitArchVariant().getArch() !=
llvm::Triple::UnknownArch) {
if (global.params.targetTriple.get64BitArchVariant().getArch() ==
llvm::Triple::mips64 ||
global.params.targetTriple.get64BitArchVariant().getArch() ==
llvm::Triple::mips64el) {
switch (getMipsABI())
{
case MipsABI::EABI:
args.push_back("-mabi=eabi");
break;
case MipsABI::O32:
args.push_back("-mabi=32");
break;
case MipsABI::N32:
args.push_back("-mabi=n32");
break;
case MipsABI::N64:
args.push_back("-mabi=64");
break;
case MipsABI::Unknown:
break;
}
}
else {
if (global.params.is64bit)
args.push_back("-m64");
else
args.push_back("-m32");
}
}
if (opts::createSharedLib && addSoname) {
std::string soname = opts::soname;
if (!soname.empty()) {
args.push_back("-Wl,-soname," + soname);
}
}
Logger::println("Linking with: ");
std::vector<std::string>::const_iterator I = args.begin(), E = args.end();
Stream logstr = Logger::cout();
for (; I != E; ++I)
if (!(*I).empty())
logstr << "'" << *I << "'" << " ";
logstr << "\n"; // FIXME where's flush ?
// try to call linker
return executeToolAndWait(gcc, args, global.params.verbose);
}
static int linkObjToBinaryGcc(bool sharedLib) {
Logger::println("*** Linking executable ***");
// find gcc for linking
const std::string tool = getGcc();
// build arguments
std::vector<std::string> args;
appendObjectFiles(args);
// Link with profile-rt library when generating an instrumented binary.
// profile-rt uses Phobos (MD5 hashing) and therefore must be passed on the
// commandline before Phobos.
if (global.params.genInstrProf) {
#if LDC_LLVM_VER >= 308
if (global.params.targetTriple->isOSLinux()) {
// For Linux, explicitly define __llvm_profile_runtime as undefined
// symbol, so that the initialization part of profile-rt is linked in.
args.push_back(
("-Wl,-u," + llvm::getInstrProfRuntimeHookVarName()).str());
}
#endif
args.push_back("-lldc-profile-rt");
}
// user libs
for (unsigned i = 0; i < global.params.libfiles->dim; i++)
args.push_back((*global.params.libfiles)[i]);
// output filename
std::string output = getOutputName(sharedLib);
if (sharedLib) {
args.push_back("-shared");
}
if (staticFlag) {
args.push_back("-static");
}
args.push_back("-o");
args.push_back(output);
// set the global gExePath
gExePath = output;
// assert(gExePath.isValid());
// create path to exe
CreateDirectoryOnDisk(gExePath);
// Pass sanitizer arguments to linker. Requires clang.
if (opts::sanitize == opts::AddressSanitizer) {
args.push_back("-fsanitize=address");
}
if (opts::sanitize == opts::MemorySanitizer) {
args.push_back("-fsanitize=memory");
}
if (opts::sanitize == opts::ThreadSanitizer) {
args.push_back("-fsanitize=thread");
}
// Add LTO link flags before adding the user link switches, such that the user
// can pass additional options to the LTO plugin.
if (opts::isUsingLTO())
addLTOLinkFlags(args);
// additional linker and cc switches (preserve order across both lists)
for (unsigned ilink = 0, icc = 0;;) {
unsigned linkpos = ilink < opts::linkerSwitches.size()
? opts::linkerSwitches.getPosition(ilink)
: std::numeric_limits<unsigned>::max();
unsigned ccpos = icc < opts::ccSwitches.size()
? opts::ccSwitches.getPosition(icc)
: std::numeric_limits<unsigned>::max();
if (linkpos < ccpos) {
const std::string& p = opts::linkerSwitches[ilink++];
// Don't push -l and -L switches using -Xlinker, but pass them indirectly
// via GCC. This makes sure user-defined paths take precedence over
// GCC's builtin LIBRARY_PATHs.
// Options starting with `-Wl,`, -shared or -static are not handled by
// the linker and must be passed to the driver.
auto str = llvm::StringRef(p);
if (!(str.startswith("-l") || str.startswith("-L") ||
str.startswith("-Wl,") ||
str.startswith("-shared") || str.startswith("-static"))) {
args.push_back("-Xlinker");
}
args.push_back(p);
} else if (ccpos < linkpos) {
args.push_back(opts::ccSwitches[icc++]);
} else {
break;
}
}
// libs added via pragma(lib, libname)
for (unsigned i = 0; i < global.params.linkswitches->dim; i++) {
args.push_back((*global.params.linkswitches)[i]);
}
// default libs
bool addSoname = false;
switch (global.params.targetTriple->getOS()) {
case llvm::Triple::Linux:
addSoname = true;
// Make sure we don't do --gc-sections when generating a profile-
// instrumented binary. The runtime relies on magic sections, which
// would be stripped by gc-section on older version of ld, see bug:
// https://sourceware.org/bugzilla/show_bug.cgi?id=19161
if (!opts::disableLinkerStripDead && !global.params.genInstrProf) {
args.push_back("-Wl,--gc-sections");
}
if (global.params.targetTriple->getEnvironment() == llvm::Triple::Android) {
args.push_back("-ldl");
args.push_back("-lm");
break;
}
args.push_back("-lrt");
// fallthrough
case llvm::Triple::Darwin:
case llvm::Triple::MacOSX:
args.push_back("-ldl");
// fallthrough
case llvm::Triple::FreeBSD:
case llvm::Triple::NetBSD:
case llvm::Triple::OpenBSD:
case llvm::Triple::DragonFly:
addSoname = true;
args.push_back("-lpthread");
args.push_back("-lm");
break;
case llvm::Triple::Solaris:
args.push_back("-lm");
args.push_back("-lumem");
args.push_back("-lsocket");
args.push_back("-lnsl");
break;
default:
// OS not yet handled, will probably lead to linker errors.
// FIXME: Win32.
break;
}
if (global.params.targetTriple->isWindowsGNUEnvironment()) {
// This is really more of a kludge, as linking in the Winsock functions
// should be handled by the pragma(lib, ...) in std.socket, but it
// makes LDC behave as expected for now.
args.push_back("-lws2_32");
}
// Only specify -m32/-m64 for architectures where the two variants actually
// exist (as e.g. the GCC ARM toolchain doesn't recognize the switches).
// MIPS does not have -m32/-m64 but requires -mabi=.
if (global.params.targetTriple->get64BitArchVariant().getArch() !=
llvm::Triple::UnknownArch &&
global.params.targetTriple->get32BitArchVariant().getArch() !=
llvm::Triple::UnknownArch) {
if (global.params.targetTriple->get64BitArchVariant().getArch() ==
llvm::Triple::mips64 ||
global.params.targetTriple->get64BitArchVariant().getArch() ==
llvm::Triple::mips64el) {
switch (getMipsABI()) {
case MipsABI::EABI:
args.push_back("-mabi=eabi");
break;
case MipsABI::O32:
args.push_back("-mabi=32");
break;
case MipsABI::N32:
args.push_back("-mabi=n32");
break;
case MipsABI::N64:
args.push_back("-mabi=64");
break;
case MipsABI::Unknown:
break;
}
} else {
switch (global.params.targetTriple->getArch()) {
case llvm::Triple::arm:
case llvm::Triple::armeb:
case llvm::Triple::aarch64:
case llvm::Triple::aarch64_be:
#if LDC_LLVM_VER == 305
case llvm::Triple::arm64:
case llvm::Triple::arm64_be:
#endif
break;
default:
if (global.params.is64bit) {
args.push_back("-m64");
} else {
args.push_back("-m32");
}
}
}
}
if (global.params.dll && addSoname) {
std::string soname = opts::soname;
if (!soname.empty()) {
args.push_back("-Wl,-soname," + soname);
}
}
Logger::println("Linking with: ");
Stream logstr = Logger::cout();
for (const auto &arg : args) {
if (!arg.empty()) {
logstr << "'" << arg << "'"
<< " ";
}
}
logstr << "\n"; // FIXME where's flush ?
// try to call linker
return executeToolAndWait(tool, args, global.params.verbose);
}
