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

1 files changed, 326 insertions, 0 deletions

diff --git a/lib/Frontend/InitHeaderSearch.cpp b/lib/Frontend/InitHeaderSearch.cpp
new file mode 100644
index 0000000000..e7dd207abe
--- /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");
+  }
+}
+