Merge pull request swiftlang#34976 from akyrtzi/parser-only-build-fix-linker-errors

[AST] Fix linker errors when doing a 'parser only' build

Author: akyrtzi

lib/AST/ClangTypeConverter.cpp

@@ -120,6 +120,10 @@ const clang::Type *ClangTypeConverter::getFunctionType(
     ArrayRef<AnyFunctionType::Param> params, Type resultTy,
     AnyFunctionType::Representation repr) {
 
+#if SWIFT_BUILD_ONLY_SYNTAXPARSERLIB
+  return nullptr;
+#endif
+
   auto resultClangTy = convert(resultTy);
   if (resultClangTy.isNull())
     return nullptr;
@@ -163,6 +167,10 @@ const clang::Type *ClangTypeConverter::getFunctionType(
     ArrayRef<SILParameterInfo> params, Optional<SILResultInfo> result,
     SILFunctionType::Representation repr) {
 
+#if SWIFT_BUILD_ONLY_SYNTAXPARSERLIB
+  return nullptr;
+#endif
+
   // Using the interface type is sufficient as type parameters get mapped to
   // `id`, since ObjC lightweight generics use type erasure. (See also: SE-0057)
   auto resultClangTy = result.hasValue()

lib/AST/NameLookup.cpp

@@ -1872,6 +1872,11 @@ AnyObjectLookupRequest::evaluate(Evaluator &evaluator, const DeclContext *dc,
   using namespace namelookup;
   QualifiedLookupResult decls;
 
+#if SWIFT_BUILD_ONLY_SYNTAXPARSERLIB
+  // Avoid calling `clang::ObjCMethodDecl::isDirectMethod()`.
+  return decls;
+#endif
+
   // Type-only lookup won't find anything on AnyObject.
   if (options & NL_OnlyTypes)
     return decls;