C++ Modules TS: add frontend support for building pcm files from module

interface files. At the moment, all declarations (and no macros) are exported,
and 'export' declarations are not supported yet.

llvm-svn: 279794

1 files changed, 5 insertions, 2 deletions

diff --git a/clang/lib/Serialization/GeneratePCH.cpp b/clang/lib/Serialization/GeneratePCH.cpp
index b2d79a2..e1765da 100644
--- a/clang/lib/Serialization/GeneratePCH.cpp
+++ b/clang/lib/Serialization/GeneratePCH.cpp
@@ -46,10 +46,13 @@ void PCHGenerator::HandleTranslationUnit(ASTContext &Ctx) {
     return;
 
   Module *Module = nullptr;
-  if (PP.getLangOpts().CompilingModule) {
+  if (PP.getLangOpts().isCompilingModule()) {
     Module = PP.getHeaderSearchInfo().lookupModule(
         PP.getLangOpts().CurrentModule, /*AllowSearch*/ false);
-    assert(Module && "emitting module but current module doesn't exist");
+    if (!Module) {
+      assert(hasErrors && "emitting module but current module doesn't exist");
+      return;
+    }
   }
 
   // Emit the PCH file to the Buffer.