[modules] Stop dropping 'module.timestamp' files into the current directory
when building with implicit modules disabled.
llvm-svn: 245136
diff --git a/clang/test/Modules/explicit-build-extra-files.cpp b/clang/test/Modules/explicit-build-extra-files.cpp
new file mode 100644
index 0000000..6cec420
--- /dev/null
+++ b/clang/test/Modules/explicit-build-extra-files.cpp
@@ -0,0 +1,14 @@
+// REQUIRES: shell
+//
+// RUN: rm -rf %t
+// RUN: mkdir %t
+// RUN: cd %t
+// RUN: echo 'module X {}' > %t/x
+// RUN: echo 'module Y {}' > %t/y
+//
+// RUN: %clang_cc1 -emit-module -fmodules -fmodule-name=X %t/x -x c++ -o %t/x.pcm
+// RUN: %clang_cc1 -emit-module -fmodules -fmodule-name=Y %t/y -x c++ -o %t/y.pcm
+// RUN: %clang_cc1 -fmodules -fmodule-file=%t/x.pcm -fmodule-file=%t/y.pcm -x c++ /dev/null -fsyntax-only
+//
+// RUN: not test -f %t/modules.timestamp
+// RUN: not test -f %t/modules.idx