1 //===--- Linux.h - Linux ToolChain Implementations --------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
12 #include "Arch/Mips.h"
14 #include "Arch/RISCV.h"
15 #include "CommonArgs.h"
16 #include "clang/Basic/VirtualFileSystem.h"
17 #include "clang/Config/config.h"
18 #include "clang/Driver/Distro.h"
19 #include "clang/Driver/Driver.h"
20 #include "clang/Driver/Options.h"
21 #include "clang/Driver/SanitizerArgs.h"
22 #include "llvm/Option/ArgList.h"
23 #include "llvm/ProfileData/InstrProf.h"
24 #include "llvm/Support/Path.h"
25 #include "llvm/Support/ScopedPrinter.h"
26 #include <system_error>
28 using namespace clang::driver;
29 using namespace clang::driver::toolchains;
30 using namespace clang;
31 using namespace llvm::opt;
33 using tools::addPathIfExists;
35 /// Get our best guess at the multiarch triple for a target.
37 /// Debian-based systems are starting to use a multiarch setup where they use
38 /// a target-triple directory in the library and header search paths.
39 /// Unfortunately, this triple does not align with the vanilla target triple,
40 /// so we provide a rough mapping here.
41 static std::string getMultiarchTriple(const Driver &D,
42 const llvm::Triple &TargetTriple,
44 llvm::Triple::EnvironmentType TargetEnvironment =
45 TargetTriple.getEnvironment();
46 bool IsAndroid = TargetTriple.isAndroid();
48 // For most architectures, just use whatever we have rather than trying to be
50 switch (TargetTriple.getArch()) {
54 // We use the existence of '/lib/<triple>' as a directory to detect some
55 // common linux triples that don't quite match the Clang triple for both
56 // 32-bit and 64-bit targets. Multiarch fixes its install triples to these
57 // regardless of what the actual target triple is.
58 case llvm::Triple::arm:
59 case llvm::Triple::thumb:
61 return "arm-linux-androideabi";
62 } else if (TargetEnvironment == llvm::Triple::GNUEABIHF) {
63 if (D.getVFS().exists(SysRoot + "/lib/arm-linux-gnueabihf"))
64 return "arm-linux-gnueabihf";
66 if (D.getVFS().exists(SysRoot + "/lib/arm-linux-gnueabi"))
67 return "arm-linux-gnueabi";
70 case llvm::Triple::armeb:
71 case llvm::Triple::thumbeb:
72 if (TargetEnvironment == llvm::Triple::GNUEABIHF) {
73 if (D.getVFS().exists(SysRoot + "/lib/armeb-linux-gnueabihf"))
74 return "armeb-linux-gnueabihf";
76 if (D.getVFS().exists(SysRoot + "/lib/armeb-linux-gnueabi"))
77 return "armeb-linux-gnueabi";
80 case llvm::Triple::x86:
82 return "i686-linux-android";
83 if (D.getVFS().exists(SysRoot + "/lib/i386-linux-gnu"))
84 return "i386-linux-gnu";
86 case llvm::Triple::x86_64:
88 return "x86_64-linux-android";
89 // We don't want this for x32, otherwise it will match x86_64 libs
90 if (TargetEnvironment != llvm::Triple::GNUX32 &&
91 D.getVFS().exists(SysRoot + "/lib/x86_64-linux-gnu"))
92 return "x86_64-linux-gnu";
94 case llvm::Triple::aarch64:
96 return "aarch64-linux-android";
97 if (D.getVFS().exists(SysRoot + "/lib/aarch64-linux-gnu"))
98 return "aarch64-linux-gnu";
100 case llvm::Triple::aarch64_be:
101 if (D.getVFS().exists(SysRoot + "/lib/aarch64_be-linux-gnu"))
102 return "aarch64_be-linux-gnu";
104 case llvm::Triple::mips:
105 if (D.getVFS().exists(SysRoot + "/lib/mips-linux-gnu"))
106 return "mips-linux-gnu";
108 case llvm::Triple::mipsel:
110 return "mipsel-linux-android";
111 if (D.getVFS().exists(SysRoot + "/lib/mipsel-linux-gnu"))
112 return "mipsel-linux-gnu";
114 case llvm::Triple::mips64:
115 if (D.getVFS().exists(SysRoot + "/lib/mips64-linux-gnu"))
116 return "mips64-linux-gnu";
117 if (D.getVFS().exists(SysRoot + "/lib/mips64-linux-gnuabi64"))
118 return "mips64-linux-gnuabi64";
120 case llvm::Triple::mips64el:
122 return "mips64el-linux-android";
123 if (D.getVFS().exists(SysRoot + "/lib/mips64el-linux-gnu"))
124 return "mips64el-linux-gnu";
125 if (D.getVFS().exists(SysRoot + "/lib/mips64el-linux-gnuabi64"))
126 return "mips64el-linux-gnuabi64";
128 case llvm::Triple::ppc:
129 if (D.getVFS().exists(SysRoot + "/lib/powerpc-linux-gnuspe"))
130 return "powerpc-linux-gnuspe";
131 if (D.getVFS().exists(SysRoot + "/lib/powerpc-linux-gnu"))
132 return "powerpc-linux-gnu";
134 case llvm::Triple::ppc64:
135 if (D.getVFS().exists(SysRoot + "/lib/powerpc64-linux-gnu"))
136 return "powerpc64-linux-gnu";
138 case llvm::Triple::ppc64le:
139 if (D.getVFS().exists(SysRoot + "/lib/powerpc64le-linux-gnu"))
140 return "powerpc64le-linux-gnu";
142 case llvm::Triple::sparc:
143 if (D.getVFS().exists(SysRoot + "/lib/sparc-linux-gnu"))
144 return "sparc-linux-gnu";
146 case llvm::Triple::sparcv9:
147 if (D.getVFS().exists(SysRoot + "/lib/sparc64-linux-gnu"))
148 return "sparc64-linux-gnu";
150 case llvm::Triple::systemz:
151 if (D.getVFS().exists(SysRoot + "/lib/s390x-linux-gnu"))
152 return "s390x-linux-gnu";
155 return TargetTriple.str();
158 static StringRef getOSLibDir(const llvm::Triple &Triple, const ArgList &Args) {
159 if (Triple.isMIPS()) {
160 if (Triple.isAndroid()) {
163 tools::mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
164 if (CPUName == "mips32r6")
166 if (CPUName == "mips32r2")
169 // lib32 directory has a special meaning on MIPS targets.
170 // It contains N32 ABI binaries. Use this folder if produce
171 // code for N32 ABI only.
172 if (tools::mips::hasMipsAbiArg(Args, "n32"))
174 return Triple.isArch32Bit() ? "lib" : "lib64";
177 // It happens that only x86 and PPC use the 'lib32' variant of oslibdir, and
178 // using that variant while targeting other architectures causes problems
179 // because the libraries are laid out in shared system roots that can't cope
180 // with a 'lib32' library search path being considered. So we only enable
181 // them when we know we may need it.
183 // FIXME: This is a bit of a hack. We should really unify this code for
184 // reasoning about oslibdir spellings with the lib dir spellings in the
185 // GCCInstallationDetector, but that is a more significant refactoring.
186 if (Triple.getArch() == llvm::Triple::x86 ||
187 Triple.getArch() == llvm::Triple::ppc)
190 if (Triple.getArch() == llvm::Triple::x86_64 &&
191 Triple.getEnvironment() == llvm::Triple::GNUX32)
194 if (Triple.getArch() == llvm::Triple::riscv32)
197 return Triple.isArch32Bit() ? "lib" : "lib64";
200 static void addMultilibsFilePaths(const Driver &D, const MultilibSet &Multilibs,
201 const Multilib &Multilib,
202 StringRef InstallPath,
203 ToolChain::path_list &Paths) {
204 if (const auto &PathsCallback = Multilibs.filePathsCallback())
205 for (const auto &Path : PathsCallback(Multilib))
206 addPathIfExists(D, InstallPath + Path, Paths);
209 Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
210 : Generic_ELF(D, Triple, Args) {
211 GCCInstallation.init(Triple, Args);
212 Multilibs = GCCInstallation.getMultilibs();
213 llvm::Triple::ArchType Arch = Triple.getArch();
214 std::string SysRoot = computeSysRoot();
216 // Cross-compiling binutils and GCC installations (vanilla and openSUSE at
217 // least) put various tools in a triple-prefixed directory off of the parent
218 // of the GCC installation. We use the GCC triple here to ensure that we end
219 // up with tools that support the same amount of cross compiling as the
220 // detected GCC installation. For example, if we find a GCC installation
221 // targeting x86_64, but it is a bi-arch GCC installation, it can also be
222 // used to target i386.
223 // FIXME: This seems unlikely to be Linux-specific.
224 ToolChain::path_list &PPaths = getProgramPaths();
225 PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" +
226 GCCInstallation.getTriple().str() + "/bin")
229 Distro Distro(D.getVFS());
231 if (Distro.IsAlpineLinux()) {
232 ExtraOpts.push_back("-z");
233 ExtraOpts.push_back("now");
236 if (Distro.IsOpenSUSE() || Distro.IsUbuntu() || Distro.IsAlpineLinux()) {
237 ExtraOpts.push_back("-z");
238 ExtraOpts.push_back("relro");
241 if (GCCInstallation.getParentLibPath().find("opt/rh/devtoolset") !=
243 // With devtoolset on RHEL, we want to add a bin directory that is relative
244 // to the detected gcc install, because if we are using devtoolset gcc then
245 // we want to use other tools from devtoolset (e.g. ld) instead of the
246 // standard system tools.
247 PPaths.push_back(Twine(GCCInstallation.getParentLibPath() +
250 if (Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb)
251 ExtraOpts.push_back("-X");
253 const bool IsAndroid = Triple.isAndroid();
254 const bool IsMips = Triple.isMIPS();
255 const bool IsHexagon = Arch == llvm::Triple::hexagon;
257 Arch == llvm::Triple::riscv32 || Arch == llvm::Triple::riscv64;
259 if (IsMips && !SysRoot.empty())
260 ExtraOpts.push_back("--sysroot=" + SysRoot);
262 // Do not use 'gnu' hash style for Mips targets because .gnu.hash
263 // and the MIPS ABI require .dynsym to be sorted in different ways.
264 // .gnu.hash needs symbols to be grouped by hash code whereas the MIPS
265 // ABI requires a mapping between the GOT and the symbol table.
266 // Android loader does not support .gnu.hash.
267 // Hexagon linker/loader does not support .gnu.hash
268 if (!IsMips && !IsAndroid && !IsHexagon) {
269 if (Distro.IsRedhat() || Distro.IsOpenSUSE() || Distro.IsAlpineLinux() ||
270 (Distro.IsUbuntu() && Distro >= Distro::UbuntuMaverick))
271 ExtraOpts.push_back("--hash-style=gnu");
273 if (Distro.IsDebian() || Distro.IsOpenSUSE() || Distro == Distro::UbuntuLucid ||
274 Distro == Distro::UbuntuJaunty || Distro == Distro::UbuntuKarmic)
275 ExtraOpts.push_back("--hash-style=both");
278 if (Distro.IsRedhat() && Distro != Distro::RHEL5 && Distro != Distro::RHEL6)
279 ExtraOpts.push_back("--no-add-needed");
281 #ifdef ENABLE_LINKER_BUILD_ID
282 ExtraOpts.push_back("--build-id");
285 if (IsAndroid || Distro.IsOpenSUSE())
286 ExtraOpts.push_back("--enable-new-dtags");
288 // The selection of paths to try here is designed to match the patterns which
289 // the GCC driver itself uses, as this is part of the GCC-compatible driver.
290 // This was determined by running GCC in a fake filesystem, creating all
291 // possible permutations of these directories, and seeing which ones it added
292 // to the link paths.
293 path_list &Paths = getFilePaths();
295 const std::string OSLibDir = getOSLibDir(Triple, Args);
296 const std::string MultiarchTriple = getMultiarchTriple(D, Triple, SysRoot);
298 // Add the multilib suffixed paths where they are available.
299 if (GCCInstallation.isValid()) {
300 const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
301 const std::string &LibPath = GCCInstallation.getParentLibPath();
302 const Multilib &Multilib = GCCInstallation.getMultilib();
303 const MultilibSet &Multilibs = GCCInstallation.getMultilibs();
305 // Add toolchain / multilib specific file paths.
306 addMultilibsFilePaths(D, Multilibs, Multilib,
307 GCCInstallation.getInstallPath(), Paths);
309 // Sourcery CodeBench MIPS toolchain holds some libraries under
310 // a biarch-like suffix of the GCC installation.
311 addPathIfExists(D, GCCInstallation.getInstallPath() + Multilib.gccSuffix(),
314 // GCC cross compiling toolchains will install target libraries which ship
315 // as part of the toolchain under <prefix>/<triple>/<libdir> rather than as
316 // any part of the GCC installation in
317 // <prefix>/<libdir>/gcc/<triple>/<version>. This decision is somewhat
318 // debatable, but is the reality today. We need to search this tree even
319 // when we have a sysroot somewhere else. It is the responsibility of
320 // whomever is doing the cross build targeting a sysroot using a GCC
321 // installation that is *not* within the system root to ensure two things:
323 // 1) Any DSOs that are linked in from this tree or from the install path
324 // above must be present on the system root and found via an
325 // appropriate rpath.
326 // 2) There must not be libraries installed into
327 // <prefix>/<triple>/<libdir> unless they should be preferred over
328 // those within the system root.
330 // Note that this matches the GCC behavior. See the below comment for where
331 // Clang diverges from GCC's behavior.
332 addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib/../" +
333 OSLibDir + Multilib.osSuffix(),
336 // If the GCC installation we found is inside of the sysroot, we want to
337 // prefer libraries installed in the parent prefix of the GCC installation.
338 // It is important to *not* use these paths when the GCC installation is
339 // outside of the system root as that can pick up unintended libraries.
340 // This usually happens when there is an external cross compiler on the
341 // host system, and a more minimal sysroot available that is the target of
342 // the cross. Note that GCC does include some of these directories in some
343 // configurations but this seems somewhere between questionable and simply
345 if (StringRef(LibPath).startswith(SysRoot)) {
346 addPathIfExists(D, LibPath + "/" + MultiarchTriple, Paths);
347 addPathIfExists(D, LibPath + "/../" + OSLibDir, Paths);
351 // Similar to the logic for GCC above, if we currently running Clang inside
352 // of the requested system root, add its parent library paths to
354 // FIXME: It's not clear whether we should use the driver's installed
355 // directory ('Dir' below) or the ResourceDir.
356 if (StringRef(D.Dir).startswith(SysRoot)) {
357 addPathIfExists(D, D.Dir + "/../lib/" + MultiarchTriple, Paths);
358 addPathIfExists(D, D.Dir + "/../" + OSLibDir, Paths);
361 addPathIfExists(D, SysRoot + "/lib/" + MultiarchTriple, Paths);
362 addPathIfExists(D, SysRoot + "/lib/../" + OSLibDir, Paths);
365 // Android sysroots contain a library directory for each supported OS
366 // version as well as some unversioned libraries in the usual multiarch
371 Triple.getEnvironmentVersion(Major, Minor, Micro);
373 SysRoot + "/usr/lib/" + MultiarchTriple + "/" +
374 llvm::to_string(Major),
378 addPathIfExists(D, SysRoot + "/usr/lib/" + MultiarchTriple, Paths);
379 // 64-bit OpenEmbedded sysroots may not have a /usr/lib dir. So they cannot
380 // find /usr/lib64 as it is referenced as /usr/lib/../lib64. So we handle
382 if (Triple.getVendor() == llvm::Triple::OpenEmbedded &&
383 Triple.isArch64Bit())
384 addPathIfExists(D, SysRoot + "/usr/" + OSLibDir, Paths);
386 addPathIfExists(D, SysRoot + "/usr/lib/../" + OSLibDir, Paths);
388 StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
389 addPathIfExists(D, SysRoot + "/" + OSLibDir + "/" + ABIName, Paths);
390 addPathIfExists(D, SysRoot + "/usr/" + OSLibDir + "/" + ABIName, Paths);
393 // Try walking via the GCC triple path in case of biarch or multiarch GCC
394 // installations with strange symlinks.
395 if (GCCInstallation.isValid()) {
397 SysRoot + "/usr/lib/" + GCCInstallation.getTriple().str() +
398 "/../../" + OSLibDir,
401 // Add the 'other' biarch variant path
402 Multilib BiarchSibling;
403 if (GCCInstallation.getBiarchSibling(BiarchSibling)) {
404 addPathIfExists(D, GCCInstallation.getInstallPath() +
405 BiarchSibling.gccSuffix(),
409 // See comments above on the multilib variant for details of why this is
410 // included even from outside the sysroot.
411 const std::string &LibPath = GCCInstallation.getParentLibPath();
412 const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
413 const Multilib &Multilib = GCCInstallation.getMultilib();
414 addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib" +
418 // See comments above on the multilib variant for details of why this is
419 // only included from within the sysroot.
420 if (StringRef(LibPath).startswith(SysRoot))
421 addPathIfExists(D, LibPath, Paths);
424 // Similar to the logic for GCC above, if we are currently running Clang
425 // inside of the requested system root, add its parent library path to those
427 // FIXME: It's not clear whether we should use the driver's installed
428 // directory ('Dir' below) or the ResourceDir.
429 if (StringRef(D.Dir).startswith(SysRoot))
430 addPathIfExists(D, D.Dir + "/../lib", Paths);
432 addPathIfExists(D, SysRoot + "/lib", Paths);
433 addPathIfExists(D, SysRoot + "/usr/lib", Paths);
436 bool Linux::HasNativeLLVMSupport() const { return true; }
438 Tool *Linux::buildLinker() const { return new tools::gnutools::Linker(*this); }
440 Tool *Linux::buildAssembler() const {
441 return new tools::gnutools::Assembler(*this);
444 std::string Linux::computeSysRoot() const {
445 if (!getDriver().SysRoot.empty())
446 return getDriver().SysRoot;
448 if (getTriple().isAndroid()) {
449 // Android toolchains typically include a sysroot at ../sysroot relative to
451 const StringRef ClangDir = getDriver().getInstalledDir();
452 std::string AndroidSysRootPath = (ClangDir + "/../sysroot").str();
453 if (getVFS().exists(AndroidSysRootPath))
454 return AndroidSysRootPath;
457 if (!GCCInstallation.isValid() || !getTriple().isMIPS())
458 return std::string();
460 // Standalone MIPS toolchains use different names for sysroot folder
461 // and put it into different places. Here we try to check some known
464 const StringRef InstallDir = GCCInstallation.getInstallPath();
465 const StringRef TripleStr = GCCInstallation.getTriple().str();
466 const Multilib &Multilib = GCCInstallation.getMultilib();
469 (InstallDir + "/../../../../" + TripleStr + "/libc" + Multilib.osSuffix())
472 if (getVFS().exists(Path))
475 Path = (InstallDir + "/../../../../sysroot" + Multilib.osSuffix()).str();
477 if (getVFS().exists(Path))
480 return std::string();
483 std::string Linux::getDynamicLinker(const ArgList &Args) const {
484 const llvm::Triple::ArchType Arch = getArch();
485 const llvm::Triple &Triple = getTriple();
487 const Distro Distro(getDriver().getVFS());
489 if (Triple.isAndroid())
490 return Triple.isArch64Bit() ? "/system/bin/linker64" : "/system/bin/linker";
492 if (Triple.isMusl()) {
493 std::string ArchName;
497 case llvm::Triple::arm:
498 case llvm::Triple::thumb:
502 case llvm::Triple::armeb:
503 case llvm::Triple::thumbeb:
508 ArchName = Triple.getArchName().str();
511 (Triple.getEnvironment() == llvm::Triple::MuslEABIHF ||
512 tools::arm::getARMFloatABI(*this, Args) == tools::arm::FloatABI::Hard))
515 return "/lib/ld-musl-" + ArchName + ".so.1";
523 llvm_unreachable("unsupported architecture");
525 case llvm::Triple::aarch64:
527 Loader = "ld-linux-aarch64.so.1";
529 case llvm::Triple::aarch64_be:
531 Loader = "ld-linux-aarch64_be.so.1";
533 case llvm::Triple::arm:
534 case llvm::Triple::thumb:
535 case llvm::Triple::armeb:
536 case llvm::Triple::thumbeb: {
538 Triple.getEnvironment() == llvm::Triple::GNUEABIHF ||
539 tools::arm::getARMFloatABI(*this, Args) == tools::arm::FloatABI::Hard;
542 Loader = HF ? "ld-linux-armhf.so.3" : "ld-linux.so.3";
545 case llvm::Triple::mips:
546 case llvm::Triple::mipsel:
547 case llvm::Triple::mips64:
548 case llvm::Triple::mips64el: {
549 bool IsNaN2008 = tools::mips::isNaN2008(Args, Triple);
551 LibDir = "lib" + tools::mips::getMipsABILibSuffix(Args, Triple);
553 if (tools::mips::isUCLibc(Args))
554 Loader = IsNaN2008 ? "ld-uClibc-mipsn8.so.0" : "ld-uClibc.so.0";
555 else if (!Triple.hasEnvironment() &&
556 Triple.getVendor() == llvm::Triple::VendorType::MipsTechnologies)
558 Triple.isLittleEndian() ? "ld-musl-mipsel.so.1" : "ld-musl-mips.so.1";
560 Loader = IsNaN2008 ? "ld-linux-mipsn8.so.1" : "ld.so.1";
564 case llvm::Triple::ppc:
568 case llvm::Triple::ppc64:
571 (tools::ppc::hasPPCAbiArg(Args, "elfv2")) ? "ld64.so.2" : "ld64.so.1";
573 case llvm::Triple::ppc64le:
576 (tools::ppc::hasPPCAbiArg(Args, "elfv1")) ? "ld64.so.1" : "ld64.so.2";
578 case llvm::Triple::riscv32: {
579 StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
581 Loader = ("ld-linux-riscv32-" + ABIName + ".so.1").str();
584 case llvm::Triple::riscv64: {
585 StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
587 Loader = ("ld-linux-riscv64-" + ABIName + ".so.1").str();
590 case llvm::Triple::sparc:
591 case llvm::Triple::sparcel:
593 Loader = "ld-linux.so.2";
595 case llvm::Triple::sparcv9:
597 Loader = "ld-linux.so.2";
599 case llvm::Triple::systemz:
601 Loader = "ld64.so.1";
603 case llvm::Triple::x86:
605 Loader = "ld-linux.so.2";
607 case llvm::Triple::x86_64: {
608 bool X32 = Triple.getEnvironment() == llvm::Triple::GNUX32;
610 LibDir = X32 ? "libx32" : "lib64";
611 Loader = X32 ? "ld-linux-x32.so.2" : "ld-linux-x86-64.so.2";
616 if (Distro == Distro::Exherbo && (Triple.getVendor() == llvm::Triple::UnknownVendor ||
617 Triple.getVendor() == llvm::Triple::PC))
618 return "/usr/" + Triple.str() + "/lib/" + Loader;
619 return "/" + LibDir + "/" + Loader;
622 void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
623 ArgStringList &CC1Args) const {
624 const Driver &D = getDriver();
625 std::string SysRoot = computeSysRoot();
627 if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
630 if (!DriverArgs.hasArg(options::OPT_nostdlibinc))
631 addSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/local/include");
633 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
634 SmallString<128> P(D.ResourceDir);
635 llvm::sys::path::append(P, "include");
636 addSystemInclude(DriverArgs, CC1Args, P);
639 if (DriverArgs.hasArg(options::OPT_nostdlibinc))
642 // Check for configure-time C include directories.
643 StringRef CIncludeDirs(C_INCLUDE_DIRS);
644 if (CIncludeDirs != "") {
645 SmallVector<StringRef, 5> dirs;
646 CIncludeDirs.split(dirs, ":");
647 for (StringRef dir : dirs) {
649 llvm::sys::path::is_absolute(dir) ? StringRef(SysRoot) : "";
650 addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
655 // Lacking those, try to detect the correct set of system includes for the
658 // Add include directories specific to the selected multilib set and multilib.
659 if (GCCInstallation.isValid()) {
660 const auto &Callback = Multilibs.includeDirsCallback();
662 for (const auto &Path : Callback(GCCInstallation.getMultilib()))
663 addExternCSystemIncludeIfExists(
664 DriverArgs, CC1Args, GCCInstallation.getInstallPath() + Path);
668 // Implement generic Debian multiarch support.
669 const StringRef X86_64MultiarchIncludeDirs[] = {
670 "/usr/include/x86_64-linux-gnu",
672 // FIXME: These are older forms of multiarch. It's not clear that they're
673 // in use in any released version of Debian, so we should consider
675 "/usr/include/i686-linux-gnu/64", "/usr/include/i486-linux-gnu/64"};
676 const StringRef X86MultiarchIncludeDirs[] = {
677 "/usr/include/i386-linux-gnu",
679 // FIXME: These are older forms of multiarch. It's not clear that they're
680 // in use in any released version of Debian, so we should consider
682 "/usr/include/x86_64-linux-gnu/32", "/usr/include/i686-linux-gnu",
683 "/usr/include/i486-linux-gnu"};
684 const StringRef AArch64MultiarchIncludeDirs[] = {
685 "/usr/include/aarch64-linux-gnu"};
686 const StringRef ARMMultiarchIncludeDirs[] = {
687 "/usr/include/arm-linux-gnueabi"};
688 const StringRef ARMHFMultiarchIncludeDirs[] = {
689 "/usr/include/arm-linux-gnueabihf"};
690 const StringRef ARMEBMultiarchIncludeDirs[] = {
691 "/usr/include/armeb-linux-gnueabi"};
692 const StringRef ARMEBHFMultiarchIncludeDirs[] = {
693 "/usr/include/armeb-linux-gnueabihf"};
694 const StringRef MIPSMultiarchIncludeDirs[] = {"/usr/include/mips-linux-gnu"};
695 const StringRef MIPSELMultiarchIncludeDirs[] = {
696 "/usr/include/mipsel-linux-gnu"};
697 const StringRef MIPS64MultiarchIncludeDirs[] = {
698 "/usr/include/mips64-linux-gnu", "/usr/include/mips64-linux-gnuabi64"};
699 const StringRef MIPS64ELMultiarchIncludeDirs[] = {
700 "/usr/include/mips64el-linux-gnu",
701 "/usr/include/mips64el-linux-gnuabi64"};
702 const StringRef PPCMultiarchIncludeDirs[] = {
703 "/usr/include/powerpc-linux-gnu"};
704 const StringRef PPC64MultiarchIncludeDirs[] = {
705 "/usr/include/powerpc64-linux-gnu"};
706 const StringRef PPC64LEMultiarchIncludeDirs[] = {
707 "/usr/include/powerpc64le-linux-gnu"};
708 const StringRef SparcMultiarchIncludeDirs[] = {
709 "/usr/include/sparc-linux-gnu"};
710 const StringRef Sparc64MultiarchIncludeDirs[] = {
711 "/usr/include/sparc64-linux-gnu"};
712 const StringRef SYSTEMZMultiarchIncludeDirs[] = {
713 "/usr/include/s390x-linux-gnu"};
714 ArrayRef<StringRef> MultiarchIncludeDirs;
715 switch (getTriple().getArch()) {
716 case llvm::Triple::x86_64:
717 MultiarchIncludeDirs = X86_64MultiarchIncludeDirs;
719 case llvm::Triple::x86:
720 MultiarchIncludeDirs = X86MultiarchIncludeDirs;
722 case llvm::Triple::aarch64:
723 case llvm::Triple::aarch64_be:
724 MultiarchIncludeDirs = AArch64MultiarchIncludeDirs;
726 case llvm::Triple::arm:
727 case llvm::Triple::thumb:
728 if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF)
729 MultiarchIncludeDirs = ARMHFMultiarchIncludeDirs;
731 MultiarchIncludeDirs = ARMMultiarchIncludeDirs;
733 case llvm::Triple::armeb:
734 case llvm::Triple::thumbeb:
735 if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF)
736 MultiarchIncludeDirs = ARMEBHFMultiarchIncludeDirs;
738 MultiarchIncludeDirs = ARMEBMultiarchIncludeDirs;
740 case llvm::Triple::mips:
741 MultiarchIncludeDirs = MIPSMultiarchIncludeDirs;
743 case llvm::Triple::mipsel:
744 MultiarchIncludeDirs = MIPSELMultiarchIncludeDirs;
746 case llvm::Triple::mips64:
747 MultiarchIncludeDirs = MIPS64MultiarchIncludeDirs;
749 case llvm::Triple::mips64el:
750 MultiarchIncludeDirs = MIPS64ELMultiarchIncludeDirs;
752 case llvm::Triple::ppc:
753 MultiarchIncludeDirs = PPCMultiarchIncludeDirs;
755 case llvm::Triple::ppc64:
756 MultiarchIncludeDirs = PPC64MultiarchIncludeDirs;
758 case llvm::Triple::ppc64le:
759 MultiarchIncludeDirs = PPC64LEMultiarchIncludeDirs;
761 case llvm::Triple::sparc:
762 MultiarchIncludeDirs = SparcMultiarchIncludeDirs;
764 case llvm::Triple::sparcv9:
765 MultiarchIncludeDirs = Sparc64MultiarchIncludeDirs;
767 case llvm::Triple::systemz:
768 MultiarchIncludeDirs = SYSTEMZMultiarchIncludeDirs;
774 const std::string AndroidMultiarchIncludeDir =
775 std::string("/usr/include/") +
776 getMultiarchTriple(D, getTriple(), SysRoot);
777 const StringRef AndroidMultiarchIncludeDirs[] = {AndroidMultiarchIncludeDir};
778 if (getTriple().isAndroid())
779 MultiarchIncludeDirs = AndroidMultiarchIncludeDirs;
781 for (StringRef Dir : MultiarchIncludeDirs) {
782 if (D.getVFS().exists(SysRoot + Dir)) {
783 addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + Dir);
788 if (getTriple().getOS() == llvm::Triple::RTEMS)
791 // Add an include of '/include' directly. This isn't provided by default by
792 // system GCCs, but is often used with cross-compiling GCCs, and harmless to
793 // add even when Clang is acting as-if it were a system compiler.
794 addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/include");
796 addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/include");
799 static std::string DetectLibcxxIncludePath(StringRef base) {
802 std::string MaxVersionString = "";
803 for (llvm::sys::fs::directory_iterator LI(base, EC), LE; !EC && LI != LE;
804 LI = LI.increment(EC)) {
805 StringRef VersionText = llvm::sys::path::filename(LI->path());
807 if (VersionText[0] == 'v' &&
808 !VersionText.slice(1, StringRef::npos).getAsInteger(10, Version)) {
809 if (Version > MaxVersion) {
810 MaxVersion = Version;
811 MaxVersionString = VersionText;
815 return MaxVersion ? (base + "/" + MaxVersionString).str() : "";
818 void Linux::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
819 llvm::opt::ArgStringList &CC1Args) const {
820 const std::string& SysRoot = computeSysRoot();
821 const std::string LibCXXIncludePathCandidates[] = {
822 DetectLibcxxIncludePath(getDriver().ResourceDir + "/include/c++"),
823 DetectLibcxxIncludePath(getDriver().Dir + "/../include/c++"),
824 // If this is a development, non-installed, clang, libcxx will
825 // not be found at ../include/c++ but it likely to be found at
826 // one of the following two locations:
827 DetectLibcxxIncludePath(SysRoot + "/usr/local/include/c++"),
828 DetectLibcxxIncludePath(SysRoot + "/usr/include/c++") };
829 for (const auto &IncludePath : LibCXXIncludePathCandidates) {
830 if (IncludePath.empty() || !getVFS().exists(IncludePath))
832 // Use the first candidate that exists.
833 addSystemInclude(DriverArgs, CC1Args, IncludePath);
838 void Linux::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
839 llvm::opt::ArgStringList &CC1Args) const {
840 // We need a detected GCC installation on Linux to provide libstdc++'s
842 if (!GCCInstallation.isValid())
845 // By default, look for the C++ headers in an include directory adjacent to
846 // the lib directory of the GCC installation. Note that this is expect to be
847 // equivalent to '/usr/include/c++/X.Y' in almost all cases.
848 StringRef LibDir = GCCInstallation.getParentLibPath();
849 StringRef InstallDir = GCCInstallation.getInstallPath();
850 StringRef TripleStr = GCCInstallation.getTriple().str();
851 const Multilib &Multilib = GCCInstallation.getMultilib();
852 const std::string GCCMultiarchTriple = getMultiarchTriple(
853 getDriver(), GCCInstallation.getTriple(), getDriver().SysRoot);
854 const std::string TargetMultiarchTriple =
855 getMultiarchTriple(getDriver(), getTriple(), getDriver().SysRoot);
856 const GCCVersion &Version = GCCInstallation.getVersion();
858 // The primary search for libstdc++ supports multiarch variants.
859 if (addLibStdCXXIncludePaths(LibDir.str() + "/../include",
860 "/c++/" + Version.Text, TripleStr,
861 GCCMultiarchTriple, TargetMultiarchTriple,
862 Multilib.includeSuffix(), DriverArgs, CC1Args))
865 // Otherwise, fall back on a bunch of options which don't use multiarch
866 // layouts for simplicity.
867 const std::string LibStdCXXIncludePathCandidates[] = {
868 // Gentoo is weird and places its headers inside the GCC install,
869 // so if the first attempt to find the headers fails, try these patterns.
870 InstallDir.str() + "/include/g++-v" + Version.Text,
871 InstallDir.str() + "/include/g++-v" + Version.MajorStr + "." +
873 InstallDir.str() + "/include/g++-v" + Version.MajorStr,
874 // Android standalone toolchain has C++ headers in yet another place.
875 LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.Text,
876 // Freescale SDK C++ headers are directly in <sysroot>/usr/include/c++,
877 // without a subdirectory corresponding to the gcc version.
878 LibDir.str() + "/../include/c++",
881 for (const auto &IncludePath : LibStdCXXIncludePathCandidates) {
882 if (addLibStdCXXIncludePaths(IncludePath, /*Suffix*/ "", TripleStr,
883 /*GCCMultiarchTriple*/ "",
884 /*TargetMultiarchTriple*/ "",
885 Multilib.includeSuffix(), DriverArgs, CC1Args))
890 void Linux::AddCudaIncludeArgs(const ArgList &DriverArgs,
891 ArgStringList &CC1Args) const {
892 CudaInstallation.AddCudaIncludeArgs(DriverArgs, CC1Args);
895 void Linux::AddIAMCUIncludeArgs(const ArgList &DriverArgs,
896 ArgStringList &CC1Args) const {
897 if (GCCInstallation.isValid()) {
898 CC1Args.push_back("-isystem");
899 CC1Args.push_back(DriverArgs.MakeArgString(
900 GCCInstallation.getParentLibPath() + "/../" +
901 GCCInstallation.getTriple().str() + "/include"));
905 bool Linux::isPIEDefault() const {
906 return (getTriple().isAndroid() && !getTriple().isAndroidVersionLT(16)) ||
907 getTriple().isMusl() || getSanitizerArgs().requiresPIE();
910 SanitizerMask Linux::getSupportedSanitizers() const {
911 const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
912 const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
913 const bool IsMIPS = getTriple().isMIPS32();
914 const bool IsMIPS64 = getTriple().isMIPS64();
915 const bool IsPowerPC64 = getTriple().getArch() == llvm::Triple::ppc64 ||
916 getTriple().getArch() == llvm::Triple::ppc64le;
917 const bool IsAArch64 = getTriple().getArch() == llvm::Triple::aarch64 ||
918 getTriple().getArch() == llvm::Triple::aarch64_be;
919 const bool IsArmArch = getTriple().getArch() == llvm::Triple::arm ||
920 getTriple().getArch() == llvm::Triple::thumb ||
921 getTriple().getArch() == llvm::Triple::armeb ||
922 getTriple().getArch() == llvm::Triple::thumbeb;
923 SanitizerMask Res = ToolChain::getSupportedSanitizers();
924 Res |= SanitizerKind::Address;
925 Res |= SanitizerKind::Fuzzer;
926 Res |= SanitizerKind::FuzzerNoLink;
927 Res |= SanitizerKind::KernelAddress;
928 Res |= SanitizerKind::Memory;
929 Res |= SanitizerKind::Vptr;
930 Res |= SanitizerKind::SafeStack;
931 if (IsX86_64 || IsMIPS64 || IsAArch64)
932 Res |= SanitizerKind::DataFlow;
933 if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsArmArch || IsPowerPC64)
934 Res |= SanitizerKind::Leak;
935 if (IsX86_64 || IsMIPS64 || IsAArch64 || IsPowerPC64)
936 Res |= SanitizerKind::Thread;
937 if (IsX86_64 || IsMIPS64)
938 Res |= SanitizerKind::Efficiency;
939 if (IsX86 || IsX86_64)
940 Res |= SanitizerKind::Function;
941 if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsMIPS || IsArmArch ||
943 Res |= SanitizerKind::Scudo;
944 if (IsX86_64 || IsAArch64) {
945 Res |= SanitizerKind::HWAddress;
946 Res |= SanitizerKind::KernelHWAddress;
951 void Linux::addProfileRTLibs(const llvm::opt::ArgList &Args,
952 llvm::opt::ArgStringList &CmdArgs) const {
953 if (!needsProfileRT(Args)) return;
955 // Add linker option -u__llvm_runtime_variable to cause runtime
956 // initialization module to be linked in.
957 if (!Args.hasArg(options::OPT_coverage))
958 CmdArgs.push_back(Args.MakeArgString(
959 Twine("-u", llvm::getInstrProfRuntimeHookVarName())));
960 ToolChain::addProfileRTLibs(Args, CmdArgs);