forked from OSchip/llvm-project
328 lines
12 KiB
C++
328 lines
12 KiB
C++
//===--- InitHeaderSearch.cpp - Initialize header search paths ----------*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the InitHeaderSearch class.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Frontend/InitHeaderSearch.h"
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#include "clang/Lex/HeaderSearch.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/LangOptions.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/System/Path.h"
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#include "llvm/Config/config.h"
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#include <cstdio>
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#include <vector>
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using namespace clang;
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void InitHeaderSearch::AddPath(const std::string &Path, IncludeDirGroup Group,
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bool isCXXAware, bool isUserSupplied,
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bool isFramework, bool IgnoreSysRoot) {
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assert(!Path.empty() && "can't handle empty path here");
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FileManager &FM = Headers.getFileMgr();
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// Compute the actual path, taking into consideration -isysroot.
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llvm::SmallString<256> MappedPath;
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// Handle isysroot.
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if (Group == System && !IgnoreSysRoot) {
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// FIXME: Portability. This should be a sys::Path interface, this doesn't
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// handle things like C:\ right, nor win32 \\network\device\blah.
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if (isysroot.size() != 1 || isysroot[0] != '/') // Add isysroot if present.
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MappedPath.append(isysroot.begin(), isysroot.end());
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}
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MappedPath.append(Path.begin(), Path.end());
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// Compute the DirectoryLookup type.
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SrcMgr::CharacteristicKind Type;
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if (Group == Quoted || Group == Angled)
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Type = SrcMgr::C_User;
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else if (isCXXAware)
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Type = SrcMgr::C_System;
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else
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Type = SrcMgr::C_ExternCSystem;
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// If the directory exists, add it.
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if (const DirectoryEntry *DE = FM.getDirectory(&MappedPath[0],
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&MappedPath[0]+
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MappedPath.size())) {
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IncludeGroup[Group].push_back(DirectoryLookup(DE, Type, isUserSupplied,
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isFramework));
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return;
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}
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// Check to see if this is an apple-style headermap (which are not allowed to
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// be frameworks).
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if (!isFramework) {
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if (const FileEntry *FE = FM.getFile(&MappedPath[0],
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&MappedPath[0]+MappedPath.size())) {
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if (const HeaderMap *HM = Headers.CreateHeaderMap(FE)) {
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// It is a headermap, add it to the search path.
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IncludeGroup[Group].push_back(DirectoryLookup(HM, Type,isUserSupplied));
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return;
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}
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}
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}
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if (Verbose)
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fprintf(stderr, "ignoring nonexistent directory \"%s\"\n",
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MappedPath.c_str());
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}
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void InitHeaderSearch::AddEnvVarPaths(const char *Name) {
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const char* at = getenv(Name);
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if (!at || *at == 0) // Empty string should not add '.' path.
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return;
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const char* delim = strchr(at, llvm::sys::PathSeparator);
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while (delim != 0) {
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if (delim-at == 0)
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AddPath(".", Angled, false, true, false);
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else
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AddPath(std::string(at, std::string::size_type(delim-at)), Angled, false,
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true, false);
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at = delim + 1;
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delim = strchr(at, llvm::sys::PathSeparator);
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}
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if (*at == 0)
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AddPath(".", Angled, false, true, false);
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else
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AddPath(at, Angled, false, true, false);
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}
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void InitHeaderSearch::AddDefaultSystemIncludePaths(const LangOptions &Lang) {
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// FIXME: temporary hack: hard-coded paths.
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// FIXME: get these from the target?
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#ifdef LLVM_ON_WIN32
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if (Lang.CPlusPlus) {
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// Mingw32 GCC version 4
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AddPath("c:/mingw/lib/gcc/mingw32/4.3.0/include/c++",
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System, true, false, false);
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AddPath("c:/mingw/lib/gcc/mingw32/4.3.0/include/c++/mingw32",
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System, true, false, false);
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AddPath("c:/mingw/lib/gcc/mingw32/4.3.0/include/c++/backward",
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System, true, false, false);
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}
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// Mingw32 GCC version 4
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AddPath("C:/mingw/include", System, false, false, false);
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#else
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if (Lang.CPlusPlus) {
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AddPath("/usr/include/c++/4.2.1", System, true, false, false);
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AddPath("/usr/include/c++/4.2.1/i686-apple-darwin10", System, true, false,
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false);
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AddPath("/usr/include/c++/4.2.1/backward", System, true, false, false);
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AddPath("/usr/include/c++/4.0.0", System, true, false, false);
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AddPath("/usr/include/c++/4.0.0/i686-apple-darwin8", System, true, false,
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false);
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AddPath("/usr/include/c++/4.0.0/backward", System, true, false, false);
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// Ubuntu 7.10 - Gutsy Gibbon
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AddPath("/usr/include/c++/4.1.3", System, true, false, false);
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AddPath("/usr/include/c++/4.1.3/i486-linux-gnu", System, true, false,
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false);
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AddPath("/usr/include/c++/4.1.3/backward", System, true, false, false);
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// Fedora 8
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AddPath("/usr/include/c++/4.1.2", System, true, false, false);
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AddPath("/usr/include/c++/4.1.2/i386-redhat-linux", System, true, false,
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false);
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AddPath("/usr/include/c++/4.1.2/backward", System, true, false, false);
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// Fedora 9
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AddPath("/usr/include/c++/4.3.0", System, true, false, false);
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AddPath("/usr/include/c++/4.3.0/i386-redhat-linux", System, true, false,
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false);
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AddPath("/usr/include/c++/4.3.0/backward", System, true, false, false);
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// Fedora 10
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AddPath("/usr/include/c++/4.3.2", System, true, false, false);
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AddPath("/usr/include/c++/4.3.2/i386-redhat-linux", System, true, false,
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false);
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AddPath("/usr/include/c++/4.3.2/backward", System, true, false, false);
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// Arch Linux 2008-06-24
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AddPath("/usr/include/c++/4.3.1", System, true, false, false);
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AddPath("/usr/include/c++/4.3.1/i686-pc-linux-gnu", System, true, false,
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false);
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AddPath("/usr/include/c++/4.3.1/backward", System, true, false, false);
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AddPath("/usr/include/c++/4.3.1/x86_64-unknown-linux-gnu", System, true,
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false, false);
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// Gentoo x86 stable
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AddPath("/usr/lib/gcc/i686-pc-linux-gnu/4.1.2/include/g++-v4", System,
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true, false, false);
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AddPath("/usr/lib/gcc/i686-pc-linux-gnu/4.1.2/include/g++-v4/"
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"i686-pc-linux-gnu", System, true, false, false);
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AddPath("/usr/lib/gcc/i686-pc-linux-gnu/4.1.2/include/g++-v4/backward",
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System, true, false, false);
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// DragonFly
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AddPath("/usr/include/c++/4.1", System, true, false, false);
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// FreeBSD
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AddPath("/usr/include/c++/4.2", System, true, false, false);
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}
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AddPath("/usr/local/include", System, false, false, false);
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AddPath("/usr/include", System, false, false, false);
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AddPath("/System/Library/Frameworks", System, true, false, true);
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AddPath("/Library/Frameworks", System, true, false, true);
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#endif
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}
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void InitHeaderSearch::AddDefaultEnvVarPaths(const LangOptions &Lang) {
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AddEnvVarPaths("CPATH");
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if (Lang.CPlusPlus && Lang.ObjC1)
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AddEnvVarPaths("OBJCPLUS_INCLUDE_PATH");
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else if (Lang.CPlusPlus)
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AddEnvVarPaths("CPLUS_INCLUDE_PATH");
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else if (Lang.ObjC1)
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AddEnvVarPaths("OBJC_INCLUDE_PATH");
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else
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AddEnvVarPaths("C_INCLUDE_PATH");
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}
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/// RemoveDuplicates - If there are duplicate directory entries in the specified
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/// search list, remove the later (dead) ones.
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static void RemoveDuplicates(std::vector<DirectoryLookup> &SearchList,
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bool Verbose) {
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llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenDirs;
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llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenFrameworkDirs;
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llvm::SmallPtrSet<const HeaderMap *, 8> SeenHeaderMaps;
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for (unsigned i = 0; i != SearchList.size(); ++i) {
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unsigned DirToRemove = i;
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const DirectoryLookup &CurEntry = SearchList[i];
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if (CurEntry.isNormalDir()) {
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// If this isn't the first time we've seen this dir, remove it.
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if (SeenDirs.insert(CurEntry.getDir()))
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continue;
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} else if (CurEntry.isFramework()) {
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// If this isn't the first time we've seen this framework dir, remove it.
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if (SeenFrameworkDirs.insert(CurEntry.getFrameworkDir()))
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continue;
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} else {
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assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?");
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// If this isn't the first time we've seen this headermap, remove it.
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if (SeenHeaderMaps.insert(CurEntry.getHeaderMap()))
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continue;
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}
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// If we have a normal #include dir/framework/headermap that is shadowed
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// later in the chain by a system include location, we actually want to
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// ignore the user's request and drop the user dir... keeping the system
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// dir. This is weird, but required to emulate GCC's search path correctly.
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//
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// Since dupes of system dirs are rare, just rescan to find the original
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// that we're nuking instead of using a DenseMap.
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if (CurEntry.getDirCharacteristic() != SrcMgr::C_User) {
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// Find the dir that this is the same of.
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unsigned FirstDir;
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for (FirstDir = 0; ; ++FirstDir) {
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assert(FirstDir != i && "Didn't find dupe?");
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const DirectoryLookup &SearchEntry = SearchList[FirstDir];
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// If these are different lookup types, then they can't be the dupe.
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if (SearchEntry.getLookupType() != CurEntry.getLookupType())
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continue;
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bool isSame;
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if (CurEntry.isNormalDir())
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isSame = SearchEntry.getDir() == CurEntry.getDir();
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else if (CurEntry.isFramework())
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isSame = SearchEntry.getFrameworkDir() == CurEntry.getFrameworkDir();
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else {
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assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?");
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isSame = SearchEntry.getHeaderMap() == CurEntry.getHeaderMap();
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}
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if (isSame)
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break;
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}
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// If the first dir in the search path is a non-system dir, zap it
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// instead of the system one.
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if (SearchList[FirstDir].getDirCharacteristic() == SrcMgr::C_User)
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DirToRemove = FirstDir;
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}
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if (Verbose) {
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fprintf(stderr, "ignoring duplicate directory \"%s\"\n",
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CurEntry.getName());
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if (DirToRemove != i)
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fprintf(stderr, " as it is a non-system directory that duplicates"
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" a system directory\n");
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}
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// This is reached if the current entry is a duplicate. Remove the
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// DirToRemove (usually the current dir).
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SearchList.erase(SearchList.begin()+DirToRemove);
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--i;
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}
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}
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void InitHeaderSearch::Realize() {
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// Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList.
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std::vector<DirectoryLookup> SearchList;
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SearchList = IncludeGroup[Angled];
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SearchList.insert(SearchList.end(), IncludeGroup[System].begin(),
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IncludeGroup[System].end());
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SearchList.insert(SearchList.end(), IncludeGroup[After].begin(),
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IncludeGroup[After].end());
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RemoveDuplicates(SearchList, Verbose);
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RemoveDuplicates(IncludeGroup[Quoted], Verbose);
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// Prepend QUOTED list on the search list.
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SearchList.insert(SearchList.begin(), IncludeGroup[Quoted].begin(),
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IncludeGroup[Quoted].end());
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bool DontSearchCurDir = false; // TODO: set to true if -I- is set?
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Headers.SetSearchPaths(SearchList, IncludeGroup[Quoted].size(),
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DontSearchCurDir);
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// If verbose, print the list of directories that will be searched.
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if (Verbose) {
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fprintf(stderr, "#include \"...\" search starts here:\n");
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unsigned QuotedIdx = IncludeGroup[Quoted].size();
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for (unsigned i = 0, e = SearchList.size(); i != e; ++i) {
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if (i == QuotedIdx)
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fprintf(stderr, "#include <...> search starts here:\n");
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const char *Name = SearchList[i].getName();
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const char *Suffix;
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if (SearchList[i].isNormalDir())
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Suffix = "";
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else if (SearchList[i].isFramework())
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Suffix = " (framework directory)";
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else {
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assert(SearchList[i].isHeaderMap() && "Unknown DirectoryLookup");
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Suffix = " (headermap)";
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}
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fprintf(stderr, " %s%s\n", Name, Suffix);
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}
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fprintf(stderr, "End of search list.\n");
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}
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}
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