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llvm-project/clang/lib/Frontend/InitHeaderSearch.cpp
Chandler Carruth aa36b89b1c [ptr-traits] Add #includes of headers rather than forward declarations 
for types which are used as pointees in PointerUnions, PointerIntPairs,
and DenseMap pointer keys.

This is part of a series of patches to allow LLVM to check for complete
pointee types when computing its pointer traits. This is absolutely
necessary to get correct (or reproducible) results for things like how
many low bits are guaranteed to be zero.

I think this is the last patch for getting Clang clean here!!!

llvm-svn: 256615
2015-12-30 03:40:23 +00:00

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//===--- InitHeaderSearch.cpp - Initialize header search paths ------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the InitHeaderSearch class.
//
//===----------------------------------------------------------------------===//
#include "clang/Frontend/Utils.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Config/config.h" // C_INCLUDE_DIRS
#include "clang/Lex/HeaderMap.h"
#include "clang/Lex/HeaderSearch.h"
#include "clang/Lex/HeaderSearchOptions.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/raw_ostream.h"
using namespace clang;
using namespace clang::frontend;
namespace {
/// InitHeaderSearch - This class makes it easier to set the search paths of
/// a HeaderSearch object. InitHeaderSearch stores several search path lists
/// internally, which can be sent to a HeaderSearch object in one swoop.
class InitHeaderSearch {
std::vector<std::pair<IncludeDirGroup, DirectoryLookup> > IncludePath;
typedef std::vector<std::pair<IncludeDirGroup,
DirectoryLookup> >::const_iterator path_iterator;
std::vector<std::pair<std::string, bool> > SystemHeaderPrefixes;
HeaderSearch &Headers;
bool Verbose;
std::string IncludeSysroot;
bool HasSysroot;
public:
InitHeaderSearch(HeaderSearch &HS, bool verbose, StringRef sysroot)
: Headers(HS), Verbose(verbose), IncludeSysroot(sysroot),
HasSysroot(!(sysroot.empty() || sysroot == "/")) {
}
/// AddPath - Add the specified path to the specified group list, prefixing
/// the sysroot if used.
void AddPath(const Twine &Path, IncludeDirGroup Group, bool isFramework);
/// AddUnmappedPath - Add the specified path to the specified group list,
/// without performing any sysroot remapping.
void AddUnmappedPath(const Twine &Path, IncludeDirGroup Group,
bool isFramework);
/// AddSystemHeaderPrefix - Add the specified prefix to the system header
/// prefix list.
void AddSystemHeaderPrefix(StringRef Prefix, bool IsSystemHeader) {
SystemHeaderPrefixes.emplace_back(Prefix, IsSystemHeader);
}
/// AddGnuCPlusPlusIncludePaths - Add the necessary paths to support a gnu
/// libstdc++.
void AddGnuCPlusPlusIncludePaths(StringRef Base,
StringRef ArchDir,
StringRef Dir32,
StringRef Dir64,
const llvm::Triple &triple);
/// AddMinGWCPlusPlusIncludePaths - Add the necessary paths to support a MinGW
/// libstdc++.
void AddMinGWCPlusPlusIncludePaths(StringRef Base,
StringRef Arch,
StringRef Version);
// AddDefaultCIncludePaths - Add paths that should always be searched.
void AddDefaultCIncludePaths(const llvm::Triple &triple,
const HeaderSearchOptions &HSOpts);
// AddDefaultCPlusPlusIncludePaths - Add paths that should be searched when
// compiling c++.
void AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple,
const HeaderSearchOptions &HSOpts);
/// AddDefaultSystemIncludePaths - Adds the default system include paths so
/// that e.g. stdio.h is found.
void AddDefaultIncludePaths(const LangOptions &Lang,
const llvm::Triple &triple,
const HeaderSearchOptions &HSOpts);
/// Realize - Merges all search path lists into one list and send it to
/// HeaderSearch.
void Realize(const LangOptions &Lang);
};
} // end anonymous namespace.
static bool CanPrefixSysroot(StringRef Path) {
#if defined(LLVM_ON_WIN32)
return !Path.empty() && llvm::sys::path::is_separator(Path[0]);
#else
return llvm::sys::path::is_absolute(Path);
#endif
}
void InitHeaderSearch::AddPath(const Twine &Path, IncludeDirGroup Group,
bool isFramework) {
// Add the path with sysroot prepended, if desired and this is a system header
// group.
if (HasSysroot) {
SmallString<256> MappedPathStorage;
StringRef MappedPathStr = Path.toStringRef(MappedPathStorage);
if (CanPrefixSysroot(MappedPathStr)) {
AddUnmappedPath(IncludeSysroot + Path, Group, isFramework);
return;
}
}
AddUnmappedPath(Path, Group, isFramework);
}
void InitHeaderSearch::AddUnmappedPath(const Twine &Path, IncludeDirGroup Group,
bool isFramework) {
assert(!Path.isTriviallyEmpty() && "can't handle empty path here");
FileManager &FM = Headers.getFileMgr();
SmallString<256> MappedPathStorage;
StringRef MappedPathStr = Path.toStringRef(MappedPathStorage);
// Compute the DirectoryLookup type.
SrcMgr::CharacteristicKind Type;
if (Group == Quoted || Group == Angled || Group == IndexHeaderMap) {
Type = SrcMgr::C_User;
} else if (Group == ExternCSystem) {
Type = SrcMgr::C_ExternCSystem;
} else {
Type = SrcMgr::C_System;
}
// If the directory exists, add it.
if (const DirectoryEntry *DE = FM.getDirectory(MappedPathStr)) {
IncludePath.push_back(
std::make_pair(Group, DirectoryLookup(DE, Type, isFramework)));
return;
}
// Check to see if this is an apple-style headermap (which are not allowed to
// be frameworks).
if (!isFramework) {
if (const FileEntry *FE = FM.getFile(MappedPathStr)) {
if (const HeaderMap *HM = Headers.CreateHeaderMap(FE)) {
// It is a headermap, add it to the search path.
IncludePath.push_back(
std::make_pair(Group,
DirectoryLookup(HM, Type, Group == IndexHeaderMap)));
return;
}
}
}
if (Verbose)
llvm::errs() << "ignoring nonexistent directory \""
<< MappedPathStr << "\"\n";
}
void InitHeaderSearch::AddGnuCPlusPlusIncludePaths(StringRef Base,
StringRef ArchDir,
StringRef Dir32,
StringRef Dir64,
const llvm::Triple &triple) {
// Add the base dir
AddPath(Base, CXXSystem, false);
// Add the multilib dirs
llvm::Triple::ArchType arch = triple.getArch();
bool is64bit = arch == llvm::Triple::ppc64 || arch == llvm::Triple::x86_64;
if (is64bit)
AddPath(Base + "/" + ArchDir + "/" + Dir64, CXXSystem, false);
else
AddPath(Base + "/" + ArchDir + "/" + Dir32, CXXSystem, false);
// Add the backward dir
AddPath(Base + "/backward", CXXSystem, false);
}
void InitHeaderSearch::AddMinGWCPlusPlusIncludePaths(StringRef Base,
StringRef Arch,
StringRef Version) {
AddPath(Base + "/" + Arch + "/" + Version + "/include/c++",
CXXSystem, false);
AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/" + Arch,
CXXSystem, false);
AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/backward",
CXXSystem, false);
}
void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple,
const HeaderSearchOptions &HSOpts) {
llvm::Triple::OSType os = triple.getOS();
if (HSOpts.UseStandardSystemIncludes) {
switch (os) {
case llvm::Triple::CloudABI:
case llvm::Triple::FreeBSD:
case llvm::Triple::NetBSD:
case llvm::Triple::OpenBSD:
case llvm::Triple::Bitrig:
case llvm::Triple::NaCl:
case llvm::Triple::PS4:
case llvm::Triple::ELFIAMCU:
break;
case llvm::Triple::Win32:
if (triple.getEnvironment() != llvm::Triple::Cygnus)
break;
default:
// FIXME: temporary hack: hard-coded paths.
AddPath("/usr/local/include", System, false);
break;
}
}
// Builtin includes use #include_next directives and should be positioned
// just prior C include dirs.
if (HSOpts.UseBuiltinIncludes) {
// Ignore the sys root, we *always* look for clang headers relative to
// supplied path.
SmallString<128> P = StringRef(HSOpts.ResourceDir);
llvm::sys::path::append(P, "include");
AddUnmappedPath(P, ExternCSystem, false);
}
// All remaining additions are for system include directories, early exit if
// we aren't using them.
if (!HSOpts.UseStandardSystemIncludes)
return;
// Add dirs specified via 'configure --with-c-include-dirs'.
StringRef CIncludeDirs(C_INCLUDE_DIRS);
if (CIncludeDirs != "") {
SmallVector<StringRef, 5> dirs;
CIncludeDirs.split(dirs, ":");
for (StringRef dir : dirs)
AddPath(dir, ExternCSystem, false);
return;
}
switch (os) {
case llvm::Triple::Linux:
llvm_unreachable("Include management is handled in the driver.");
case llvm::Triple::CloudABI: {
// <sysroot>/<triple>/include
SmallString<128> P = StringRef(HSOpts.ResourceDir);
llvm::sys::path::append(P, "../../..", triple.str(), "include");
AddPath(P, System, false);
break;
}
case llvm::Triple::Haiku:
AddPath("/boot/common/include", System, false);
AddPath("/boot/develop/headers/os", System, false);
AddPath("/boot/develop/headers/os/app", System, false);
AddPath("/boot/develop/headers/os/arch", System, false);
AddPath("/boot/develop/headers/os/device", System, false);
AddPath("/boot/develop/headers/os/drivers", System, false);
AddPath("/boot/develop/headers/os/game", System, false);
AddPath("/boot/develop/headers/os/interface", System, false);
AddPath("/boot/develop/headers/os/kernel", System, false);
AddPath("/boot/develop/headers/os/locale", System, false);
AddPath("/boot/develop/headers/os/mail", System, false);
AddPath("/boot/develop/headers/os/media", System, false);
AddPath("/boot/develop/headers/os/midi", System, false);
AddPath("/boot/develop/headers/os/midi2", System, false);
AddPath("/boot/develop/headers/os/net", System, false);
AddPath("/boot/develop/headers/os/storage", System, false);
AddPath("/boot/develop/headers/os/support", System, false);
AddPath("/boot/develop/headers/os/translation", System, false);
AddPath("/boot/develop/headers/os/add-ons/graphics", System, false);
AddPath("/boot/develop/headers/os/add-ons/input_server", System, false);
AddPath("/boot/develop/headers/os/add-ons/screen_saver", System, false);
AddPath("/boot/develop/headers/os/add-ons/tracker", System, false);
AddPath("/boot/develop/headers/os/be_apps/Deskbar", System, false);
AddPath("/boot/develop/headers/os/be_apps/NetPositive", System, false);
AddPath("/boot/develop/headers/os/be_apps/Tracker", System, false);
AddPath("/boot/develop/headers/cpp", System, false);
AddPath("/boot/develop/headers/cpp/i586-pc-haiku", System, false);
AddPath("/boot/develop/headers/3rdparty", System, false);
AddPath("/boot/develop/headers/bsd", System, false);
AddPath("/boot/develop/headers/glibc", System, false);
AddPath("/boot/develop/headers/posix", System, false);
AddPath("/boot/develop/headers", System, false);
break;
case llvm::Triple::RTEMS:
break;
case llvm::Triple::Win32:
switch (triple.getEnvironment()) {
default: llvm_unreachable("Include management is handled in the driver.");
case llvm::Triple::Cygnus:
AddPath("/usr/include/w32api", System, false);
break;
case llvm::Triple::GNU:
break;
}
break;
default:
break;
}
switch (os) {
case llvm::Triple::CloudABI:
case llvm::Triple::RTEMS:
case llvm::Triple::NaCl:
case llvm::Triple::ELFIAMCU:
break;
case llvm::Triple::PS4: {
// <isysroot> gets prepended later in AddPath().
std::string BaseSDKPath = "";
if (!HasSysroot) {
const char *envValue = getenv("SCE_PS4_SDK_DIR");
if (envValue)
BaseSDKPath = envValue;
else {
// HSOpts.ResourceDir variable contains the location of Clang's
// resource files.
// Assuming that Clang is configured for PS4 without
// --with-clang-resource-dir option, the location of Clang's resource
// files is <SDK_DIR>/host_tools/lib/clang
SmallString<128> P = StringRef(HSOpts.ResourceDir);
llvm::sys::path::append(P, "../../..");
BaseSDKPath = P.str();
}
}
AddPath(BaseSDKPath + "/target/include", System, false);
if (triple.isPS4CPU())
AddPath(BaseSDKPath + "/target/include_common", System, false);
}
default:
AddPath("/usr/include", ExternCSystem, false);
break;
}
}
void InitHeaderSearch::
AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOptions &HSOpts) {
llvm::Triple::OSType os = triple.getOS();
// FIXME: temporary hack: hard-coded paths.
if (triple.isOSDarwin()) {
switch (triple.getArch()) {
default: break;
case llvm::Triple::ppc:
case llvm::Triple::ppc64:
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
"powerpc-apple-darwin10", "", "ppc64",
triple);
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
"powerpc-apple-darwin10", "", "ppc64",
triple);
break;
case llvm::Triple::x86:
case llvm::Triple::x86_64:
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
"i686-apple-darwin10", "", "x86_64", triple);
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
"i686-apple-darwin8", "", "", triple);
break;
case llvm::Triple::arm:
case llvm::Triple::thumb:
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
"arm-apple-darwin10", "v7", "", triple);
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
"arm-apple-darwin10", "v6", "", triple);
break;
case llvm::Triple::aarch64:
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
"arm64-apple-darwin10", "", "", triple);
break;
}
return;
}
switch (os) {
case llvm::Triple::Linux:
llvm_unreachable("Include management is handled in the driver.");
break;
case llvm::Triple::Win32:
switch (triple.getEnvironment()) {
default: llvm_unreachable("Include management is handled in the driver.");
case llvm::Triple::Cygnus:
// Cygwin-1.7
AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.7.3");
AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3");
AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4");
// g++-4 / Cygwin-1.5
AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2");
break;
}
break;
case llvm::Triple::DragonFly:
AddPath("/usr/include/c++/5.0", CXXSystem, false);
break;
case llvm::Triple::OpenBSD: {
std::string t = triple.getTriple();
if (t.substr(0, 6) == "x86_64")
t.replace(0, 6, "amd64");
AddGnuCPlusPlusIncludePaths("/usr/include/g++",
t, "", "", triple);
break;
}
case llvm::Triple::Minix:
AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3",
"", "", "", triple);
break;
default:
break;
}
}
void InitHeaderSearch::AddDefaultIncludePaths(const LangOptions &Lang,
const llvm::Triple &triple,
const HeaderSearchOptions &HSOpts) {
// NB: This code path is going away. All of the logic is moving into the
// driver which has the information necessary to do target-specific
// selections of default include paths. Each target which moves there will be
// exempted from this logic here until we can delete the entire pile of code.
switch (triple.getOS()) {
default:
break; // Everything else continues to use this routine's logic.
case llvm::Triple::Linux:
return;
case llvm::Triple::Win32:
if (triple.getEnvironment() != llvm::Triple::Cygnus ||
triple.isOSBinFormatMachO())
return;
break;
}
if (Lang.CPlusPlus && HSOpts.UseStandardCXXIncludes &&
HSOpts.UseStandardSystemIncludes) {
if (HSOpts.UseLibcxx) {
if (triple.isOSDarwin()) {
// On Darwin, libc++ may be installed alongside the compiler in
// include/c++/v1.
if (!HSOpts.ResourceDir.empty()) {
// Remove version from foo/lib/clang/version
StringRef NoVer = llvm::sys::path::parent_path(HSOpts.ResourceDir);
// Remove clang from foo/lib/clang
StringRef Lib = llvm::sys::path::parent_path(NoVer);
// Remove lib from foo/lib
SmallString<128> P = llvm::sys::path::parent_path(Lib);
// Get foo/include/c++/v1
llvm::sys::path::append(P, "include", "c++", "v1");
AddUnmappedPath(P, CXXSystem, false);
}
}
AddPath("/usr/include/c++/v1", CXXSystem, false);
} else {
AddDefaultCPlusPlusIncludePaths(triple, HSOpts);
}
}
AddDefaultCIncludePaths(triple, HSOpts);
// Add the default framework include paths on Darwin.
if (HSOpts.UseStandardSystemIncludes) {
if (triple.isOSDarwin()) {
AddPath("/System/Library/Frameworks", System, true);
AddPath("/Library/Frameworks", System, true);
}
}
}
/// RemoveDuplicates - If there are duplicate directory entries in the specified
/// search list, remove the later (dead) ones. Returns the number of non-system
/// headers removed, which is used to update NumAngled.
static unsigned RemoveDuplicates(std::vector<DirectoryLookup> &SearchList,
unsigned First, bool Verbose) {
llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenDirs;
llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenFrameworkDirs;
llvm::SmallPtrSet<const HeaderMap *, 8> SeenHeaderMaps;
unsigned NonSystemRemoved = 0;
for (unsigned i = First; i != SearchList.size(); ++i) {
unsigned DirToRemove = i;
const DirectoryLookup &CurEntry = SearchList[i];
if (CurEntry.isNormalDir()) {
// If this isn't the first time we've seen this dir, remove it.
if (SeenDirs.insert(CurEntry.getDir()).second)
continue;
} else if (CurEntry.isFramework()) {
// If this isn't the first time we've seen this framework dir, remove it.
if (SeenFrameworkDirs.insert(CurEntry.getFrameworkDir()).second)
continue;
} else {
assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?");
// If this isn't the first time we've seen this headermap, remove it.
if (SeenHeaderMaps.insert(CurEntry.getHeaderMap()).second)
continue;
}
// If we have a normal #include dir/framework/headermap that is shadowed
// later in the chain by a system include location, we actually want to
// ignore the user's request and drop the user dir... keeping the system
// dir. This is weird, but required to emulate GCC's search path correctly.
//
// Since dupes of system dirs are rare, just rescan to find the original
// that we're nuking instead of using a DenseMap.
if (CurEntry.getDirCharacteristic() != SrcMgr::C_User) {
// Find the dir that this is the same of.
unsigned FirstDir;
for (FirstDir = 0; ; ++FirstDir) {
assert(FirstDir != i && "Didn't find dupe?");
const DirectoryLookup &SearchEntry = SearchList[FirstDir];
// If these are different lookup types, then they can't be the dupe.
if (SearchEntry.getLookupType() != CurEntry.getLookupType())
continue;
bool isSame;
if (CurEntry.isNormalDir())
isSame = SearchEntry.getDir() == CurEntry.getDir();
else if (CurEntry.isFramework())
isSame = SearchEntry.getFrameworkDir() == CurEntry.getFrameworkDir();
else {
assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?");
isSame = SearchEntry.getHeaderMap() == CurEntry.getHeaderMap();
}
if (isSame)
break;
}
// If the first dir in the search path is a non-system dir, zap it
// instead of the system one.
if (SearchList[FirstDir].getDirCharacteristic() == SrcMgr::C_User)
DirToRemove = FirstDir;
}
if (Verbose) {
llvm::errs() << "ignoring duplicate directory \""
<< CurEntry.getName() << "\"\n";
if (DirToRemove != i)
llvm::errs() << " as it is a non-system directory that duplicates "
<< "a system directory\n";
}
if (DirToRemove != i)
++NonSystemRemoved;
// This is reached if the current entry is a duplicate. Remove the
// DirToRemove (usually the current dir).
SearchList.erase(SearchList.begin()+DirToRemove);
--i;
}
return NonSystemRemoved;
}
void InitHeaderSearch::Realize(const LangOptions &Lang) {
// Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList.
std::vector<DirectoryLookup> SearchList;
SearchList.reserve(IncludePath.size());
// Quoted arguments go first.
for (auto &Include : IncludePath)
if (Include.first == Quoted)
SearchList.push_back(Include.second);
// Deduplicate and remember index.
RemoveDuplicates(SearchList, 0, Verbose);
unsigned NumQuoted = SearchList.size();
for (auto &Include : IncludePath)
if (Include.first == Angled || Include.first == IndexHeaderMap)
SearchList.push_back(Include.second);
RemoveDuplicates(SearchList, NumQuoted, Verbose);
unsigned NumAngled = SearchList.size();
for (auto &Include : IncludePath)
if (Include.first == System || Include.first == ExternCSystem ||
(!Lang.ObjC1 && !Lang.CPlusPlus && Include.first == CSystem) ||
(/*FIXME !Lang.ObjC1 && */ Lang.CPlusPlus &&
Include.first == CXXSystem) ||
(Lang.ObjC1 && !Lang.CPlusPlus && Include.first == ObjCSystem) ||
(Lang.ObjC1 && Lang.CPlusPlus && Include.first == ObjCXXSystem))
SearchList.push_back(Include.second);
for (auto &Include : IncludePath)
if (Include.first == After)
SearchList.push_back(Include.second);
// Remove duplicates across both the Angled and System directories. GCC does
// this and failing to remove duplicates across these two groups breaks
// #include_next.
unsigned NonSystemRemoved = RemoveDuplicates(SearchList, NumQuoted, Verbose);
NumAngled -= NonSystemRemoved;
bool DontSearchCurDir = false; // TODO: set to true if -I- is set?
Headers.SetSearchPaths(SearchList, NumQuoted, NumAngled, DontSearchCurDir);
Headers.SetSystemHeaderPrefixes(SystemHeaderPrefixes);
// If verbose, print the list of directories that will be searched.
if (Verbose) {
llvm::errs() << "#include \"...\" search starts here:\n";
for (unsigned i = 0, e = SearchList.size(); i != e; ++i) {
if (i == NumQuoted)
llvm::errs() << "#include <...> search starts here:\n";
const char *Name = SearchList[i].getName();
const char *Suffix;
if (SearchList[i].isNormalDir())
Suffix = "";
else if (SearchList[i].isFramework())
Suffix = " (framework directory)";
else {
assert(SearchList[i].isHeaderMap() && "Unknown DirectoryLookup");
Suffix = " (headermap)";
}
llvm::errs() << " " << Name << Suffix << "\n";
}
llvm::errs() << "End of search list.\n";
}
}
void clang::ApplyHeaderSearchOptions(HeaderSearch &HS,
const HeaderSearchOptions &HSOpts,
const LangOptions &Lang,
const llvm::Triple &Triple) {
InitHeaderSearch Init(HS, HSOpts.Verbose, HSOpts.Sysroot);
// Add the user defined entries.
for (unsigned i = 0, e = HSOpts.UserEntries.size(); i != e; ++i) {
const HeaderSearchOptions::Entry &E = HSOpts.UserEntries[i];
if (E.IgnoreSysRoot) {
Init.AddUnmappedPath(E.Path, E.Group, E.IsFramework);
} else {
Init.AddPath(E.Path, E.Group, E.IsFramework);
}
}
Init.AddDefaultIncludePaths(Lang, Triple, HSOpts);
for (unsigned i = 0, e = HSOpts.SystemHeaderPrefixes.size(); i != e; ++i)
Init.AddSystemHeaderPrefix(HSOpts.SystemHeaderPrefixes[i].Prefix,
HSOpts.SystemHeaderPrefixes[i].IsSystemHeader);
if (HSOpts.UseBuiltinIncludes) {
// Set up the builtin include directory in the module map.
SmallString<128> P = StringRef(HSOpts.ResourceDir);
llvm::sys::path::append(P, "include");
if (const DirectoryEntry *Dir = HS.getFileMgr().getDirectory(P))
HS.getModuleMap().setBuiltinIncludeDir(Dir);
}
Init.Realize(Lang);
}
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