Make the clang module container format selectable from the command line.

- introduces a new cc1 option -fmodule-format=[raw,obj]
  with 'raw' being the default
- supports arbitrary module container formats that libclang is agnostic to
- adds the format to the module hash to avoid collisions
- splits the old PCHContainerOperations into PCHContainerWriter and
  a PCHContainerReader.

Thanks to Richard Smith for reviewing this patch!

llvm-svn: 242499

1 files changed, 3 insertions, 1 deletions

diff --git a/clang/lib/Lex/HeaderSearch.cpp b/clang/lib/Lex/HeaderSearch.cpp
index b805990..983dc18 100644
--- a/clang/lib/Lex/HeaderSearch.cpp
+++ b/clang/lib/Lex/HeaderSearch.cpp
@@ -14,6 +14,7 @@
 #include "clang/Lex/HeaderSearch.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/IdentifierTable.h"
+#include "clang/Frontend/PCHContainerOperations.h"
 #include "clang/Lex/ExternalPreprocessorSource.h"
 #include "clang/Lex/HeaderMap.h"
 #include "clang/Lex/HeaderSearchOptions.h"
@@ -151,7 +152,8 @@ std::string HeaderSearch::getModuleFileName(StringRef ModuleName,
     auto FileName = llvm::sys::path::filename(ModuleMapPath);
 
     llvm::hash_code Hash =
-        llvm::hash_combine(DirName.lower(), FileName.lower());
+      llvm::hash_combine(DirName.lower(), FileName.lower(),
+                         HSOpts->ModuleFormat);
 
     SmallString<128> HashStr;
     llvm::APInt(64, size_t(Hash)).toStringUnsigned(HashStr, /*Radix*/36);