Rename lib/Driver (etc) to lib/Frontend in prep for the *actual*
driver taking lib/Driver.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65811 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/InitHeaderSearch.cpp b/lib/Frontend/InitHeaderSearch.cpp
new file mode 100644
index 0000000..e7dd207
--- /dev/null
+++ b/lib/Frontend/InitHeaderSearch.cpp
@@ -0,0 +1,326 @@
+//===--- 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/System/Path.h"
+#include "llvm/Config/config.h"
+#include <vector>
+using namespace clang;
+
+void InitHeaderSearch::AddPath(const std::string &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[0],
+ &MappedPath[0]+
+ MappedPath.size())) {
+ 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[0],
+ &MappedPath[0]+MappedPath.size())) {
+ 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)
+ fprintf(stderr, "ignoring nonexistent directory \"%s\"\n",
+ MappedPath.c_str());
+}
+
+
+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(std::string(at, std::string::size_type(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::AddDefaultSystemIncludePaths(const LangOptions &Lang) {
+ // FIXME: temporary hack: hard-coded paths.
+ // FIXME: get these from the target?
+
+#ifdef LLVM_ON_WIN32
+ if (Lang.CPlusPlus) {
+ // Mingw32 GCC version 4
+ AddPath("c:/mingw/lib/gcc/mingw32/4.3.0/include/c++",
+ System, true, false, false);
+ AddPath("c:/mingw/lib/gcc/mingw32/4.3.0/include/c++/mingw32",
+ System, true, false, false);
+ AddPath("c:/mingw/lib/gcc/mingw32/4.3.0/include/c++/backward",
+ System, true, false, false);
+ }
+
+ // Mingw32 GCC version 4
+ AddPath("C:/mingw/include", System, false, false, false);
+#else
+
+ if (Lang.CPlusPlus) {
+ AddPath("/usr/include/c++/4.2.1", System, true, false, false);
+ AddPath("/usr/include/c++/4.2.1/i686-apple-darwin10", System, true, false,
+ false);
+ AddPath("/usr/include/c++/4.2.1/backward", System, true, false, false);
+
+ AddPath("/usr/include/c++/4.0.0", System, true, false, false);
+ AddPath("/usr/include/c++/4.0.0/i686-apple-darwin8", System, true, false,
+ false);
+ AddPath("/usr/include/c++/4.0.0/backward", System, true, false, false);
+
+ // Ubuntu 7.10 - Gutsy Gibbon
+ AddPath("/usr/include/c++/4.1.3", System, true, false, false);
+ AddPath("/usr/include/c++/4.1.3/i486-linux-gnu", System, true, false,
+ false);
+ AddPath("/usr/include/c++/4.1.3/backward", System, true, false, false);
+
+ // Fedora 8
+ AddPath("/usr/include/c++/4.1.2", System, true, false, false);
+ AddPath("/usr/include/c++/4.1.2/i386-redhat-linux", System, true, false,
+ false);
+ AddPath("/usr/include/c++/4.1.2/backward", System, true, false, false);
+
+ // Fedora 9
+ AddPath("/usr/include/c++/4.3.0", System, true, false, false);
+ AddPath("/usr/include/c++/4.3.0/i386-redhat-linux", System, true, false,
+ false);
+ AddPath("/usr/include/c++/4.3.0/backward", System, true, false, false);
+
+ // Fedora 10
+ AddPath("/usr/include/c++/4.3.2", System, true, false, false);
+ AddPath("/usr/include/c++/4.3.2/i386-redhat-linux", System, true, false,
+ false);
+ AddPath("/usr/include/c++/4.3.2/backward", System, true, false, false);
+
+ // Arch Linux 2008-06-24
+ AddPath("/usr/include/c++/4.3.1", System, true, false, false);
+ AddPath("/usr/include/c++/4.3.1/i686-pc-linux-gnu", System, true, false,
+ false);
+ AddPath("/usr/include/c++/4.3.1/backward", System, true, false, false);
+ AddPath("/usr/include/c++/4.3.1/x86_64-unknown-linux-gnu", System, true,
+ false, false);
+
+ // Gentoo x86 stable
+ AddPath("/usr/lib/gcc/i686-pc-linux-gnu/4.1.2/include/g++-v4", System,
+ true, false, false);
+ AddPath("/usr/lib/gcc/i686-pc-linux-gnu/4.1.2/include/g++-v4/"
+ "i686-pc-linux-gnu", System, true, false, false);
+ AddPath("/usr/lib/gcc/i686-pc-linux-gnu/4.1.2/include/g++-v4/backward",
+ System, true, false, false);
+
+ // DragonFly
+ AddPath("/usr/include/c++/4.1", System, true, false, false);
+
+ // FreeBSD
+ AddPath("/usr/include/c++/4.2", System, true, false, false);
+ }
+
+ 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);
+#endif
+}
+
+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");
+ }
+}
+