# Before 2008.06.24 it lived in llvm-test, so exclude that as well for now.
DIRS:= $(filter-out llvm-test test-suite,$(patsubst $(PROJ_SRC_DIR)/%/Makefile,%,$(wildcard $(PROJ_SRC_DIR)/*/Makefile)))
+# Don't build compiler-rt, it isn't designed to be built directly.
+DIRS := $(filter-out compiler-rt,$(DIRS))
+
+# Don't build libcxx, it isn't designed to be built directly.
+DIRS := $(filter-out libcxx,$(DIRS))
+
# Sparc cannot link shared libraries (libtool problem?)
ifeq ($(ARCH), Sparc)
DIRS := $(filter-out sample, $(DIRS))