Add -Wincomplete-module, which detects when a header is included from a module but isn't itself part of a module.

llvm-svn: 182263

4 files changed, 12 insertions, 0 deletions

diff --git a/clang/test/Modules/Inputs/incomplete_mod.h b/clang/test/Modules/Inputs/incomplete_mod.h
new file mode 100644
index 00000000000..f08be724413
--- /dev/null
+++ b/clang/test/Modules/Inputs/incomplete_mod.h
@@ -0,0 +1 @@
+#include "incomplete_mod_missing.h"
diff --git a/clang/test/Modules/Inputs/incomplete_mod_missing.h b/clang/test/Modules/Inputs/incomplete_mod_missing.h
new file mode 100644
index 00000000000..ffc85d5e730
--- /dev/null
+++ b/clang/test/Modules/Inputs/incomplete_mod_missing.h
@@ -0,0 +1,2 @@
+extern int *missing;
+
diff --git a/clang/test/Modules/Inputs/module.map b/clang/test/Modules/Inputs/module.map
index d20521f9c76..249700a494a 100644
--- a/clang/test/Modules/Inputs/module.map
+++ b/clang/test/Modules/Inputs/module.map
@@ -209,3 +209,7 @@ module linkage_merge {
   }
 
 }
+
+module incomplete_mod {
+  header "incomplete_mod.h"
+}
diff --git a/clang/test/Modules/incomplete-module.m b/clang/test/Modules/incomplete-module.m
new file mode 100644
index 00000000000..8edaea983cb
--- /dev/null
+++ b/clang/test/Modules/incomplete-module.m
@@ -0,0 +1,5 @@
+@import incomplete_mod;
+
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -fmodules-cache-path=%t -Wincomplete-module -fmodules -I %S/Inputs %s 2>&1 | FileCheck %s
+// CHECK: {{warning: header '.*incomplete_mod_missing.h' is included in module 'incomplete_mod' but not listed in module map}}