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llvm-project/clang/lib/Frontend/InitHeaderSearch.cpp

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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/InitHeaderSearch.h"
#include "clang/Lex/HeaderSearch.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/LangOptions.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Path.h"
#include "llvm/Config/config.h"
#include <cstdio>
#ifdef _MSC_VER
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h>
#endif
using namespace clang;
void InitHeaderSearch::AddPath(const llvm::StringRef &Path,
IncludeDirGroup Group, bool isCXXAware,
bool isUserSupplied, bool isFramework,
bool IgnoreSysRoot) {
assert(!Path.empty() && "can't handle empty path here");
FileManager &FM = Headers.getFileMgr();
// Compute the actual path, taking into consideration -isysroot.
llvm::SmallString<256> MappedPath;
// Handle isysroot.
if (Group == System && !IgnoreSysRoot) {
// FIXME: Portability. This should be a sys::Path interface, this doesn't
// handle things like C:\ right, nor win32 \\network\device\blah.
if (isysroot.size() != 1 || isysroot[0] != '/') // Add isysroot if present.
MappedPath.append(isysroot.begin(), isysroot.end());
}
MappedPath.append(Path.begin(), Path.end());
// Compute the DirectoryLookup type.
SrcMgr::CharacteristicKind Type;
if (Group == Quoted || Group == Angled)
Type = SrcMgr::C_User;
else if (isCXXAware)
Type = SrcMgr::C_System;
else
Type = SrcMgr::C_ExternCSystem;
// If the directory exists, add it.
if (const DirectoryEntry *DE = FM.getDirectory(MappedPath.str())) {
IncludeGroup[Group].push_back(DirectoryLookup(DE, Type, isUserSupplied,
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(MappedPath.str())) {
if (const HeaderMap *HM = Headers.CreateHeaderMap(FE)) {
// It is a headermap, add it to the search path.
IncludeGroup[Group].push_back(DirectoryLookup(HM, Type,isUserSupplied));
return;
}
}
}
if (Verbose)
llvm::errs() << "ignoring nonexistent directory \""
<< MappedPath.str() << "\"\n";
}
void InitHeaderSearch::AddEnvVarPaths(const char *Name) {
const char* at = getenv(Name);
if (!at || *at == 0) // Empty string should not add '.' path.
return;
const char* delim = strchr(at, llvm::sys::PathSeparator);
while (delim != 0) {
if (delim-at == 0)
AddPath(".", Angled, false, true, false);
else
AddPath(llvm::StringRef(at, delim-at), Angled, false, true, false);
at = delim + 1;
delim = strchr(at, llvm::sys::PathSeparator);
}
if (*at == 0)
AddPath(".", Angled, false, true, false);
else
AddPath(at, Angled, false, true, false);
}
void InitHeaderSearch::AddGnuCPlusPlusIncludePaths(const std::string &Base,
const char *Arch) {
AddPath(Base, System, true, false, false);
AddPath(Base + "/" + Arch, System, true, false, false);
AddPath(Base + "/backward", System, true, false, false);
}
void InitHeaderSearch::AddMinGWCPlusPlusIncludePaths(const std::string &Base,
const char *Arch,
const char *Version) {
std::string localBase = Base + "/" + Arch + "/" + Version + "/include";
AddPath(localBase, System, true, false, false);
AddPath(localBase + "/c++", System, true, false, false);
AddPath(localBase + "/c++/backward", System, true, false, false);
}
// FIXME: This probably should goto to some platform utils place.
#ifdef _MSC_VER
// Read registry string.
bool getSystemRegistryString(const char *keyPath, const char *valueName,
char *value, size_t maxLength) {
HKEY hRootKey = NULL;
HKEY hKey = NULL;
const char* subKey = NULL;
DWORD valueType;
DWORD valueSize = maxLength - 1;
bool returnValue = false;
if (strncmp(keyPath, "HKEY_CLASSES_ROOT\\", 18) == 0) {
hRootKey = HKEY_CLASSES_ROOT;
subKey = keyPath + 18;
}
else if (strncmp(keyPath, "HKEY_USERS\\", 11) == 0) {
hRootKey = HKEY_USERS;
subKey = keyPath + 11;
}
else if (strncmp(keyPath, "HKEY_LOCAL_MACHINE\\", 19) == 0) {
hRootKey = HKEY_LOCAL_MACHINE;
subKey = keyPath + 19;
}
else if (strncmp(keyPath, "HKEY_CURRENT_USER\\", 18) == 0) {
hRootKey = HKEY_CURRENT_USER;
subKey = keyPath + 18;
}
else
return(false);
long lResult = RegOpenKeyEx(hRootKey, subKey, 0, KEY_READ, &hKey);
if (lResult == ERROR_SUCCESS) {
lResult = RegQueryValueEx(hKey, valueName, NULL, &valueType,
(LPBYTE)value, &valueSize);
if (lResult == ERROR_SUCCESS)
returnValue = true;
RegCloseKey(hKey);
}
return(returnValue);
}
#else // _MSC_VER
// Read registry string.
bool getSystemRegistryString(const char *, const char *, char *, size_t) {
return(false);
}
#endif // _MSC_VER
// Get Visual Studio installation directory.
bool getVisualStudioDir(std::string &path) {
// Try the Windows registry first.
char vs80IDEInstallDir[256];
char vs90IDEInstallDir[256];
const char* vsIDEInstallDir = NULL;
bool has80 = getSystemRegistryString(
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\8.0",
"InstallDir", vs80IDEInstallDir, sizeof(vs80IDEInstallDir) - 1);
bool has90 = getSystemRegistryString(
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\9.0",
"InstallDir", vs90IDEInstallDir, sizeof(vs90IDEInstallDir) - 1);
// If we have both vc80 and vc90, pick version we were compiled with.
if (has80 && has90) {
#ifdef _MSC_VER
#if (_MSC_VER >= 1500) // VC90
vsIDEInstallDir = vs90IDEInstallDir;
#elif (_MSC_VER == 1400) // VC80
vsIDEInstallDir = vs80IDEInstallDir;
#else
vsIDEInstallDir = vs90IDEInstallDir;
#endif
#else
vsIDEInstallDir = vs90IDEInstallDir;
#endif
}
else if (has90)
vsIDEInstallDir = vs90IDEInstallDir;
else if (has80)
vsIDEInstallDir = vs80IDEInstallDir;
if (vsIDEInstallDir && *vsIDEInstallDir) {
char *p = (char*)strstr(vsIDEInstallDir, "\\Common7\\IDE");
if (p)
*p = '\0';
path = vsIDEInstallDir;
return(true);
}
else {
// Try the environment.
const char* vs90comntools = getenv("VS90COMNTOOLS");
const char* vs80comntools = getenv("VS80COMNTOOLS");
const char* vscomntools = NULL;
// If we have both vc80 and vc90, pick version we were compiled with.
if (vs90comntools && vs80comntools) {
#if (_MSC_VER >= 1500) // VC90
vscomntools = vs90comntools;
#elif (_MSC_VER == 1400) // VC80
vscomntools = vs80comntools;
#else
vscomntools = vs90comntools;
#endif
}
else if (vs90comntools)
vscomntools = vs90comntools;
else if (vs80comntools)
vscomntools = vs80comntools;
if (vscomntools && *vscomntools) {
char *p = (char*)strstr(vscomntools, "\\Common7\\Tools");
if (p)
*p = '\0';
path = vscomntools;
return(true);
}
else
return(false);
}
return(false);
}
void InitHeaderSearch::AddDefaultSystemIncludePaths(const LangOptions &Lang,
const llvm::Triple &triple) {
// FIXME: temporary hack: hard-coded paths.
llvm::Triple::OSType os = triple.getOS();
switch (os) {
case llvm::Triple::Win32:
{
std::string VSDir;
if (getVisualStudioDir(VSDir)) {
AddPath(VSDir + "\\VC\\include", System, false, false, false);
AddPath(VSDir + "\\VC\\PlatformSDK\\Include",
System, false, false, false);
}
else {
// Default install paths.
AddPath("C:/Program Files/Microsoft Visual Studio 9.0/VC/include",
System, false, false, false);
AddPath(
"C:/Program Files/Microsoft Visual Studio 9.0/VC/PlatformSDK/Include",
System, false, false, false);
AddPath("C:/Program Files/Microsoft Visual Studio 8/VC/include",
System, false, false, false);
AddPath(
"C:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/Include",
System, false, false, false);
// For some clang developers.
AddPath("G:/Program Files/Microsoft Visual Studio 9.0/VC/include",
System, false, false, false);
AddPath(
"G:/Program Files/Microsoft Visual Studio 9.0/VC/PlatformSDK/Include",
System, false, false, false);
}
}
break;
case llvm::Triple::Cygwin:
if (Lang.CPlusPlus) {
AddPath("/lib/gcc/i686-pc-cygwin/3.4.4/include",
System, false, false, false);
AddPath("/lib/gcc/i686-pc-cygwin/3.4.4/include/c++",
System, false, false, false);
}
AddPath("/usr/include", System, false, false, false);
break;
case llvm::Triple::MinGW64:
if (Lang.CPlusPlus) { // I'm guessing here.
// Try gcc 4.4.0
AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw64", "4.4.0");
// Try gcc 4.3.0
AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw64", "4.3.0");
}
// Fall through.
case llvm::Triple::MinGW32:
if (Lang.CPlusPlus) {
// Try gcc 4.4.0
AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.4.0");
// Try gcc 4.3.0
AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.3.0");
}
AddPath("c:/mingw/include", System, true, false, false);
break;
default:
if (Lang.CPlusPlus) {
switch (os) {
case llvm::Triple::Darwin:
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
"i686-apple-darwin10");
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
"i686-apple-darwin8");
break;
case llvm::Triple::Linux:
// Ubuntu 7.10 - Gutsy Gibbon
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.1.3",
"i486-linux-gnu");
// Ubuntu 9.04
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3.3",
"x86_64-linux-gnu");
// Fedora 8
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.1.2",
"i386-redhat-linux");
// Fedora 9
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3.0",
"i386-redhat-linux");
// Fedora 10
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3.2",
"i386-redhat-linux");
// openSUSE 11.1
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3",
"i586-suse-linux");
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3",
"x86_64-suse-linux");
// openSUSE 11.2
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4",
"i586-suse-linux");
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.4",
"x86_64-suse-linux");
// Arch Linux 2008-06-24
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3.1",
"i686-pc-linux-gnu");
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3.1",
"x86_64-unknown-linux-gnu");
// Gentoo x86 2009.0 stable
AddGnuCPlusPlusIncludePaths(
"/usr/lib/gcc/i686-pc-linux-gnu/4.3.2/include/g++-v4",
"i686-pc-linux-gnu");
// Gentoo x86 2008.0 stable
AddGnuCPlusPlusIncludePaths(
"/usr/lib/gcc/i686-pc-linux-gnu/4.1.2/include/g++-v4",
"i686-pc-linux-gnu");
// Ubuntu 8.10
AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.3",
"i486-pc-linux-gnu");
// Gentoo amd64 stable
AddGnuCPlusPlusIncludePaths(
"/usr/lib/gcc/x86_64-pc-linux-gnu/4.1.2/include/g++-v4",
"i686-pc-linux-gnu");
break;
case llvm::Triple::FreeBSD:
// DragonFly
AddPath("/usr/include/c++/4.1", System, true, false, false);
// FreeBSD
AddPath("/usr/include/c++/4.2", System, true, false, false);
break;
case llvm::Triple::Solaris:
// AuroraUX
AddGnuCPlusPlusIncludePaths("/opt/gcc4/include/c++/4.2.4",
"i386-pc-solaris2.11");
break;
default:
break;
}
}
break;
}
AddPath("/usr/local/include", System, false, false, false);
AddPath("/usr/include", System, false, false, false);
AddPath("/System/Library/Frameworks", System, true, false, true);
AddPath("/Library/Frameworks", System, true, false, true);
}
void InitHeaderSearch::AddDefaultEnvVarPaths(const LangOptions &Lang) {
AddEnvVarPaths("CPATH");
if (Lang.CPlusPlus && Lang.ObjC1)
AddEnvVarPaths("OBJCPLUS_INCLUDE_PATH");
else if (Lang.CPlusPlus)
AddEnvVarPaths("CPLUS_INCLUDE_PATH");
else if (Lang.ObjC1)
AddEnvVarPaths("OBJC_INCLUDE_PATH");
else
AddEnvVarPaths("C_INCLUDE_PATH");
}
/// RemoveDuplicates - If there are duplicate directory entries in the specified
/// search list, remove the later (dead) ones.
static void RemoveDuplicates(std::vector<DirectoryLookup> &SearchList,
bool Verbose) {
llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenDirs;
llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenFrameworkDirs;
llvm::SmallPtrSet<const HeaderMap *, 8> SeenHeaderMaps;
for (unsigned i = 0; 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()))
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()))
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()))
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) {
fprintf(stderr, "ignoring duplicate directory \"%s\"\n",
CurEntry.getName());
if (DirToRemove != i)
fprintf(stderr, " as it is a non-system directory that duplicates"
" a system directory\n");
}
// This is reached if the current entry is a duplicate. Remove the
// DirToRemove (usually the current dir).
SearchList.erase(SearchList.begin()+DirToRemove);
--i;
}
}
void InitHeaderSearch::Realize() {
// Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList.
std::vector<DirectoryLookup> SearchList;
SearchList = IncludeGroup[Angled];
SearchList.insert(SearchList.end(), IncludeGroup[System].begin(),
IncludeGroup[System].end());
SearchList.insert(SearchList.end(), IncludeGroup[After].begin(),
IncludeGroup[After].end());
RemoveDuplicates(SearchList, Verbose);
RemoveDuplicates(IncludeGroup[Quoted], Verbose);
// Prepend QUOTED list on the search list.
SearchList.insert(SearchList.begin(), IncludeGroup[Quoted].begin(),
IncludeGroup[Quoted].end());
bool DontSearchCurDir = false; // TODO: set to true if -I- is set?
Headers.SetSearchPaths(SearchList, IncludeGroup[Quoted].size(),
DontSearchCurDir);
// If verbose, print the list of directories that will be searched.
if (Verbose) {
fprintf(stderr, "#include \"...\" search starts here:\n");
unsigned QuotedIdx = IncludeGroup[Quoted].size();
for (unsigned i = 0, e = SearchList.size(); i != e; ++i) {
if (i == QuotedIdx)
fprintf(stderr, "#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)";
}
fprintf(stderr, " %s%s\n", Name, Suffix);
}
fprintf(stderr, "End of search list.\n");
}
}
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