Original patch by Talin.

* Added the first LLVM unittest -- DenseMap.
* Updated mkpatch utility to include llvm/unittests dir
* Added top-level target "unittests" to run all unittests


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61541 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Makefile b/Makefile
index cfb4c12..5987b88 100644
--- a/Makefile
+++ b/Makefile
@@ -28,7 +28,7 @@
   OPTIONAL_DIRS := examples projects bindings
 endif
 
-EXTRA_DIST := test llvm.spec include win32 Xcode
+EXTRA_DIST := test unittests llvm.spec include win32 Xcode
 
 include $(LEVEL)/Makefile.config 
 
@@ -54,6 +54,11 @@
   OPTIONAL_DIRS :=
 endif
 
+ifeq ($(MAKECMDGOALS),unittests)
+  DIRS := $(filter-out tools runtime docs, $(DIRS)) utils unittests
+  OPTIONAL_DIRS :=
+endif
+
 # Don't install utils, examples, or projects they are only used to 
 # build LLVM.
 ifeq ($(MAKECMDGOALS),install)
@@ -111,6 +116,7 @@
 tools-only: all
 libs-only: all
 install-libs: install
+unittests: all
 
 #------------------------------------------------------------------------
 # Make sure the generated headers are up-to-date. This must be kept in