+LEVEL := .
+
+# Top-Level LLVM Build Stages:
+# 1. Build lib/System and lib/Support, which are used by utils (tblgen).
+# 2. Build utils, which is used by VMCore.
+# 3. Build VMCore, which builds the Intrinsics.inc file used by libs.
+# 4. Build libs, which are needed by llvm-config.
+# 5. Build llvm-config, which determines inter-lib dependencies for tools.
+# 6. Build tools, runtime, docs.
+#
+DIRS := lib/System lib/Support utils lib/VMCore lib tools/llvm-config \
+ tools runtime docs
+
+OPTIONAL_DIRS := examples projects bindings
+EXTRA_DIST := test llvm.spec include win32 Xcode
+
+include $(LEVEL)/Makefile.config
+
+# When cross-compiling, there are some things (tablegen) that need to
+# be build for the build system.
+ifeq ($(LLVM_CROSS_COMPILING),1)
+ BUILD_TARGET_DIRS := lib/System lib/Support utils
+endif
+
+# llvm-gcc4 doesn't need runtime libs. llvm-gcc4 is the only supported one.
+# FIXME: Remove runtime entirely once we have an understanding of where
+# libprofile etc should go.
+#ifeq ($(LLVMGCC_MAJVERS),4)
+ DIRS := $(filter-out runtime, $(DIRS))
+#endif
+
+ifeq ($(MAKECMDGOALS),libs-only)
+ DIRS := $(filter-out tools runtime docs, $(DIRS))
+ OPTIONAL_DIRS :=
+endif
+
+ifeq ($(MAKECMDGOALS),install-libs)
+ DIRS := $(filter-out tools runtime docs, $(DIRS))
+ OPTIONAL_DIRS := $(filter bindings, $(OPTIONAL_DIRS))
+endif
+
+ifeq ($(MAKECMDGOALS),tools-only)
+ DIRS := $(filter-out runtime docs, $(DIRS))
+ OPTIONAL_DIRS :=