Add -resource-dir to clang -cc1, this allows the base directory for compiler

resources (e.g., /usr/lib/clang/1.1) to be passed on the command line instead of
computed.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91370 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Driver/CC1Options.td

@@ -223,6 +223,8 @@ def load : Separate<"-load">, MetaVarName<"<dsopath>">,
   HelpText<"Load the named plugin (dynamic shared object)">;
 def plugin : Separate<"-plugin">,
   HelpText<"Use the named plugin action (use \"help\" to list available options)">;
+def resource_dir : Separate<"-resource-dir">,
+  HelpText<"The directory which holds the compiler resource files">;
 def version : Flag<"-version">,
   HelpText<"Print the compiler version">;
 def _version : Flag<"--version">, Alias<version>;

include/clang/Frontend/CompilerInvocation.h

@@ -94,7 +94,7 @@ public:
   /// compiler path.
   /// \param MainAddr - The address of main (or some other function in the main
   /// executable), for finding the builtin compiler path.
-  static std::string GetBuiltinIncludePath(const char *Argv0, void *MainAddr);
+  static std::string GetResourcesPath(const char *Argv0, void *MainAddr);
 
   /// toArgs - Convert the CompilerInvocation to a list of strings suitable for
   /// passing to CreateFromArgs.

include/clang/Frontend/HeaderSearchOptions.h

@@ -61,9 +61,9 @@ public:
   std::string CXXEnvIncPath;
   std::string ObjCXXEnvIncPath;
 
-  /// If non-empty, the path to the compiler builtin include directory, which
-  /// will be searched following the user and environment includes.
-  std::string BuiltinIncludePath;
+  /// The directory which holds the compiler resource files (builtin includes,
+  /// etc.).
+  std::string ResourceDir;
 
   /// Include the compiler builtin includes.
   unsigned UseBuiltinIncludes : 1;

lib/Frontend/ASTUnit.cpp

@@ -327,10 +327,8 @@ ASTUnit *ASTUnit::LoadFromCommandLine(const char **ArgBegin,
                                      (const char**) CCArgs.data()+CCArgs.size(),
                                      Diags);
 
-  // Set the builtin include path.
-  llvm::sys::Path P(ResourceFilesPath);
-  P.appendComponent("include");
-  CI.getHeaderSearchOpts().BuiltinIncludePath = P.str();
+  // Override the resources path.
+  CI.getHeaderSearchOpts().ResourceDir = ResourceFilesPath;
 
   CI.getFrontendOpts().DisableFree = UseBumpAllocator;
   return LoadFromCompilerInvocation(CI, Diags, OnlyLocalDecls);

lib/Frontend/CompilerInvocation.cpp

@@ -409,8 +409,9 @@ static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
     // FIXME: Provide an option for this, and move env detection to driver.
     llvm::llvm_report_error("Not yet implemented!");
   }
-  if (!Opts.BuiltinIncludePath.empty()) {
-    // FIXME: Provide an option for this, and move to driver.
+  if (!Opts.ResourceDir.empty()) {
+    Res.push_back("-resource-dir");
+    Res.push_back(Opts.ResourceDir);
   }
   if (!Opts.UseStandardIncludes)
     Res.push_back("-nostdinc");
@@ -951,8 +952,8 @@ ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Diagnostic &Diags) {
   return DashX;
 }
 
-std::string CompilerInvocation::GetBuiltinIncludePath(const char *Argv0,
-                                                      void *MainAddr) {
+std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
+                                                 void *MainAddr) {
   llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
 
   if (!P.isEmpty()) {
@@ -963,7 +964,6 @@ std::string CompilerInvocation::GetBuiltinIncludePath(const char *Argv0,
     P.appendComponent("lib");
     P.appendComponent("clang");
     P.appendComponent(CLANG_VERSION_STRING);
-    P.appendComponent("include");
   }
 
   return P.str();
@@ -975,10 +975,7 @@ static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
   Opts.Verbose = Args.hasArg(OPT_v);
   Opts.UseBuiltinIncludes = !Args.hasArg(OPT_nobuiltininc);
   Opts.UseStandardIncludes = !Args.hasArg(OPT_nostdinc);
-  // Filled in by clients.
-  //
-  // FIXME: Elimate this.
-  Opts.BuiltinIncludePath = "";
+  Opts.ResourceDir = getLastArgValue(Args, OPT_resource_dir);
 
   // Add -I... and -F... options in order.
   for (arg_iterator it = Args.filtered_begin(OPT_I, OPT_F),

lib/Frontend/InitHeaderSearch.cpp

@@ -733,8 +733,9 @@ void clang::ApplyHeaderSearchOptions(HeaderSearch &HS,
   if (HSOpts.UseBuiltinIncludes) {
     // Ignore the sys root, we *always* look for clang headers relative to
     // supplied path.
-    Init.AddPath(HSOpts.BuiltinIncludePath, System,
-                 false, false, false, /*IgnoreSysRoot=*/ true);
+    llvm::sys::Path P(HSOpts.ResourceDir);
+    P.appendComponent("include");
+    Init.AddPath(P.str(), System, false, false, false, /*IgnoreSysRoot=*/ true);
   }
 
   if (HSOpts.UseStandardIncludes)

tools/driver/cc1_main.cpp

@@ -211,9 +211,9 @@ int cc1_main(const char **ArgBegin, const char **ArgEnd,
 
   // Infer the builtin include path if unspecified.
   if (Clang.getInvocation().getHeaderSearchOpts().UseBuiltinIncludes &&
-      Clang.getInvocation().getHeaderSearchOpts().BuiltinIncludePath.empty())
-    Clang.getInvocation().getHeaderSearchOpts().BuiltinIncludePath =
-      CompilerInvocation::GetBuiltinIncludePath(Argv0, MainAddr);
+      Clang.getInvocation().getHeaderSearchOpts().ResourceDir.empty())
+    Clang.getInvocation().getHeaderSearchOpts().ResourceDir =
+      CompilerInvocation::GetResourcesPath(Argv0, MainAddr);
 
   // Honor -help.
   if (Clang.getInvocation().getFrontendOpts().ShowHelp) {

tools/index-test/index-test.cpp

@@ -224,11 +224,10 @@ ASTUnit *CreateFromSource(const std::string &Filename, Diagnostic &Diags,
     Args.push_back(CompilerArgs[i].c_str());
 
   void *MainAddr = (void*) (intptr_t) CreateFromSource;
-  llvm::sys::Path ResourcesPath(
-    CompilerInvocation::GetBuiltinIncludePath(Argv0, MainAddr));
-  ResourcesPath.eraseComponent();
+  std::string ResourceDir =
+    CompilerInvocation::GetResourcesPath(Argv0, MainAddr);
   return ASTUnit::LoadFromCommandLine(Args.data(), Args.data() + Args.size(),
-                                      Diags, ResourcesPath.str());
+                                      Diags, ResourceDir);
 }
 
 int main(int argc, char **argv) {