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//===- Config.h -------------------------------------------------*- C++ -*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include "llvm/ADT/CachedHashString.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/BinaryFormat/MachO.h"
#include "llvm/Support/CachePruning.h"
#include "llvm/Support/GlobPattern.h"
#include "llvm/Support/VersionTuple.h"
#include "llvm/TextAPI/Architecture.h"
#include "llvm/TextAPI/Platform.h"
#include "llvm/TextAPI/Target.h"
#include <vector>
namespace lld {
namespace macho {
class Symbol;
struct SymbolPriorityEntry;
using NamePair = std::pair<llvm::StringRef, llvm::StringRef>;
using SectionRenameMap = llvm::DenseMap<NamePair, NamePair>;
using SegmentRenameMap = llvm::DenseMap<llvm::StringRef, llvm::StringRef>;
struct PlatformInfo {
llvm::MachO::Target target;
llvm::VersionTuple minimum;
llvm::VersionTuple sdk;
inline uint32_t encodeVersion(const llvm::VersionTuple &version) {
return ((version.getMajor() << 020) |
(version.getMinor().getValueOr(0) << 010) |
enum class NamespaceKind {
enum class UndefinedSymbolTreatment {
enum class ICFLevel {
struct SectionAlign {
llvm::StringRef segName;
llvm::StringRef sectName;
uint32_t align;
struct SegmentProtection {
llvm::StringRef name;
uint32_t maxProt;
uint32_t initProt;
class SymbolPatterns {
// GlobPattern can also match literals,
// but we prefer the O(1) lookup of DenseSet.
llvm::DenseSet<llvm::CachedHashStringRef> literals;
std::vector<llvm::GlobPattern> globs;
bool empty() const { return literals.empty() && globs.empty(); }
void clear();
void insert(llvm::StringRef symbolName);
bool matchLiteral(llvm::StringRef symbolName) const;
bool matchGlob(llvm::StringRef symbolName) const;
bool match(llvm::StringRef symbolName) const;
struct Configuration {
Symbol *entry = nullptr;
bool hasReexports = false;
bool allLoad = false;
bool applicationExtension = false;
bool archMultiple = false;
bool exportDynamic = false;
bool forceLoadObjC = false;
bool forceLoadSwift = false;
bool staticLink = false;
bool implicitDylibs = false;
bool isPic = false;
bool headerPadMaxInstallNames = false;
bool ltoNewPassManager = LLVM_ENABLE_NEW_PASS_MANAGER;
bool markDeadStrippableDylib = false;
bool printDylibSearch = false;
bool printEachFile = false;
bool printWhyLoad = false;
bool searchDylibsFirst = false;
bool saveTemps = false;
bool adhocCodesign = false;
bool emitFunctionStarts = false;
bool emitBitcodeBundle = false;
bool emitDataInCodeInfo = false;
bool emitEncryptionInfo = false;
bool timeTraceEnabled = false;
bool dataConst = false;
bool dedupLiterals = true;
bool omitDebugInfo = false;
bool warnDylibInstallName = false;
uint32_t headerPad;
uint32_t dylibCompatibilityVersion = 0;
uint32_t dylibCurrentVersion = 0;
uint32_t timeTraceGranularity = 500;
unsigned optimize;
std::string progName;
// For `clang -arch arm64 -arch x86_64`, clang will:
// 1. invoke the linker twice, to write one temporary output per arch
// 2. invoke `lipo` to merge the two outputs into a single file
// `outputFile` is the name of the temporary file the linker writes to.
// `finalOutput `is the name of the file lipo writes to after the link.
llvm::StringRef outputFile;
llvm::StringRef finalOutput;
llvm::StringRef installName;
llvm::StringRef mapFile;
llvm::StringRef ltoObjPath;
llvm::StringRef thinLTOJobs;
llvm::StringRef umbrella;
uint32_t ltoo = 2;
llvm::CachePruningPolicy thinLTOCachePolicy;
llvm::StringRef thinLTOCacheDir;
bool deadStripDylibs = false;
bool demangle = false;
bool deadStrip = false;
bool errorForArchMismatch = false;
PlatformInfo platformInfo;
NamespaceKind namespaceKind = NamespaceKind::twolevel;
UndefinedSymbolTreatment undefinedSymbolTreatment =
ICFLevel icfLevel = ICFLevel::none;
llvm::MachO::HeaderFileType outputType;
std::vector<llvm::StringRef> systemLibraryRoots;
std::vector<llvm::StringRef> librarySearchPaths;
std::vector<llvm::StringRef> frameworkSearchPaths;
std::vector<llvm::StringRef> runtimePaths;
std::vector<std::string> astPaths;
std::vector<Symbol *> explicitUndefineds;
llvm::StringSet<> explicitDynamicLookups;
// There are typically few custom sectionAlignments or segmentProtections,
// so use a vector instead of a map.
std::vector<SectionAlign> sectionAlignments;
std::vector<SegmentProtection> segmentProtections;
llvm::DenseMap<llvm::StringRef, SymbolPriorityEntry> priorities;
SectionRenameMap sectionRenameMap;
SegmentRenameMap segmentRenameMap;
SymbolPatterns exportedSymbols;
SymbolPatterns unexportedSymbols;
bool zeroModTime = false;
llvm::StringRef osoPrefix;
llvm::MachO::Architecture arch() const { return; }
llvm::MachO::PlatformKind platform() const {
// The symbol with the highest priority should be ordered first in the output
// section (modulo input section contiguity constraints). Using priority
// (highest first) instead of order (lowest first) has the convenient property
// that the default-constructed zero priority -- for symbols/sections without a
// user-defined order -- naturally ends up putting them at the end of the
// output.
struct SymbolPriorityEntry {
// The priority given to a matching symbol, regardless of which object file
// it originated from.
size_t anyObjectFile = 0;
// The priority given to a matching symbol from a particular object file.
llvm::DenseMap<llvm::StringRef, size_t> objectFiles;
// Whether to force-load an archive.
enum class ForceLoad {
Default, // Apply -all_load or -ObjC behaviors if those flags are enabled
Yes, // Always load the archive, regardless of other flags
No, // Never load the archive, regardless of other flags
extern Configuration *config;
} // namespace macho
} // namespace lld