Implement support for -nostdc++. Fixes PR6446.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99417 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 10 insertions, 4 deletions

diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index 6e18f346d5..dc2c6bf361 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -436,6 +436,8 @@ static void HeaderSearchOptsToArgs(const HeaderSearchOptions &Opts,
   }
   if (!Opts.UseStandardIncludes)
     Res.push_back("-nostdinc");
+  if (!Opts.UseStandardCXXIncludes)
+    Res.push_back("-nostdinc++");
   if (Opts.Verbose)
     Res.push_back("-v");
 }
@@ -1014,6 +1016,7 @@ 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);
+  Opts.UseStandardCXXIncludes = !Args.hasArg(OPT_nostdincxx);
   Opts.ResourceDir = getLastArgValue(Args, OPT_resource_dir);
 
   // Add -I... and -F... options in order.
diff --git a/lib/Frontend/InitHeaderSearch.cpp b/lib/Frontend/InitHeaderSearch.cpp
index cd749d221d..9f5bced0d4 100644
--- a/lib/Frontend/InitHeaderSearch.cpp
+++ b/lib/Frontend/InitHeaderSearch.cpp
@@ -82,7 +82,8 @@ public:
   /// AddDefaultSystemIncludePaths - Adds the default system include paths so
   ///  that e.g. stdio.h is found.
   void AddDefaultSystemIncludePaths(const LangOptions &Lang,
-                                    const llvm::Triple &triple);
+                                    const llvm::Triple &triple,
+                                    bool UseStandardCXXIncludes);
 
   /// Realize - Merges all search path lists into one list and send it to
   /// HeaderSearch.
@@ -594,8 +595,9 @@ void InitHeaderSearch::AddDefaultCPlusPlusIncludePaths(const llvm::Triple &tripl
 }
 
 void InitHeaderSearch::AddDefaultSystemIncludePaths(const LangOptions &Lang,
-                                                    const llvm::Triple &triple) {
-  if (Lang.CPlusPlus)
+                                                    const llvm::Triple &triple,
+                                                  bool UseStandardCXXIncludes) {
+  if (Lang.CPlusPlus && UseStandardCXXIncludes)
     AddDefaultCPlusPlusIncludePaths(triple);
 
   AddDefaultCIncludePaths(triple);
@@ -765,7 +767,8 @@ void clang::ApplyHeaderSearchOptions(HeaderSearch &HS,
   }
 
   if (HSOpts.UseStandardIncludes)
-    Init.AddDefaultSystemIncludePaths(Lang, Triple);
+    Init.AddDefaultSystemIncludePaths(Lang, Triple, 
+                                      HSOpts.UseStandardCXXIncludes);
 
   Init.Realize();
 }