Allow submodule inferrences with a missing umbrella when the module is unavailable

If the module is unavailable because of a missing header, don't diagnose
a "module * {}" declaration for having a missing umbrella.

llvm-svn: 206776

2 files changed, 8 insertions, 1 deletions

diff --git a/clang/lib/Lex/ModuleMap.cpp b/clang/lib/Lex/ModuleMap.cpp
index 0e712b0dce6..068e16d0431 100644
--- a/clang/lib/Lex/ModuleMap.cpp
+++ b/clang/lib/Lex/ModuleMap.cpp
@@ -1988,7 +1988,8 @@ void ModuleMapParser::parseInferredModuleDecl(bool Framework, bool Explicit) {
 
   if (ActiveModule) {
     // Inferred modules must have umbrella directories.
-    if (!Failed && !ActiveModule->getUmbrellaDir()) {
+    if (!Failed && ActiveModule->IsAvailable &&
+        !ActiveModule->getUmbrellaDir()) {
       Diags.Report(StarLoc, diag::err_mmap_inferred_no_umbrella);
       Failed = true;
     }
diff --git a/clang/test/Modules/Inputs/submodules/module.map b/clang/test/Modules/Inputs/submodules/module.map
index 27c1ee4c615..1c1b76a0896 100644
--- a/clang/test/Modules/Inputs/submodules/module.map
+++ b/clang/test/Modules/Inputs/submodules/module.map
@@ -24,3 +24,9 @@ module missing_unavailable_headers {
   }
   module not_missing { }
 }
+
+module missing_umbrella_with_inferred_submodules {
+  umbrella header "missing_umbrella.h"
+  module * { export * }
+  export *
+}