Modules hide macro definitions by default, so that silly things like

include guards don't show up as macro definitions in every translation
unit that imports a module. Macro definitions can, however, be
exported with the intentionally-ugly #__export_macro__
directive. Implement this feature by not even bothering to serialize
non-exported macros to a module, because clients of that module need
not (should not) know that these macros even exist.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@138943 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 2 deletions

diff --git a/lib/Serialization/GeneratePCH.cpp b/lib/Serialization/GeneratePCH.cpp
index 358954ed19..25fac8b7a8 100644
--- a/lib/Serialization/GeneratePCH.cpp
+++ b/lib/Serialization/GeneratePCH.cpp
@@ -28,9 +28,11 @@ using namespace clang;
 
 PCHGenerator::PCHGenerator(const Preprocessor &PP,
                            StringRef OutputFile,
+                           bool IsModule,
                            StringRef isysroot,
                            raw_ostream *OS)
-  : PP(PP), OutputFile(OutputFile), isysroot(isysroot.str()), Out(OS), 
+  : PP(PP), OutputFile(OutputFile), IsModule(IsModule), 
+    isysroot(isysroot.str()), Out(OS), 
     SemaPtr(0), StatCalls(0), Stream(Buffer), Writer(Stream) {
   // Install a stat() listener to keep track of all of the stat()
   // calls.
@@ -50,7 +52,7 @@ void PCHGenerator::HandleTranslationUnit(ASTContext &Ctx) {
   
   // Emit the PCH file
   assert(SemaPtr && "No Sema?");
-  Writer.WriteAST(*SemaPtr, StatCalls, OutputFile, isysroot);
+  Writer.WriteAST(*SemaPtr, StatCalls, OutputFile, IsModule, isysroot);
 
   // Write the generated bitstream to "Out".
   Out->write((char *)&Buffer.front(), Buffer.size());