+###############################################################################
+# Set up variables for building libararies
+###############################################################################
+
+#---------------------------------------------------------
+# Define various command line options pertaining to the
+# libraries needed when linking. There are "Proj" libs
+# (defined by the user's project) and "LLVM" libs (defined
+# by the LLVM project).
+#---------------------------------------------------------
+
+ifdef USEDLIBS
+ProjLibsOptions := $(patsubst %.a.o, -l%, $(addsuffix .o, $(USEDLIBS)))
+ProjLibsOptions := $(patsubst %.o, $(LibDir)/%.o, $(ProjLibsOptions))
+ProjUsedLibs := $(patsubst %.a.o, lib%.a, $(addsuffix .o, $(USEDLIBS)))
+ProjLibsPaths := $(addprefix $(LibDir)/,$(ProjUsedLibs))
+endif
+
+ifdef LLVMLIBS
+LLVMLibsOptions := $(patsubst %.a.o, -l%, $(addsuffix .o, $(LLVMLIBS)))
+LLVMLibsOptions := $(patsubst %.o, $(LLVMLibDir)/%.o, $(LLVMLibsOptions))
+LLVMUsedLibs := $(patsubst %.a.o, lib%.a, $(addsuffix .o, $(LLVMLIBS)))
+LLVMLibsPaths := $(addprefix $(LLVMLibDir)/,$(LLVMUsedLibs))
+endif
+
+ifeq ($(strip $(filter clean clean-local dist-clean,$(MAKECMDGOALS))),)
+ifdef LINK_COMPONENTS
+
+# If LLVM_CONFIG doesn't exist, build it. This can happen if you do a make
+# clean in tools, then do a make in tools (instead of at the top level).
+$(LLVM_CONFIG):
+ @echo "*** llvm-config doesn't exist - rebuilding it."
+ @$(MAKE) -C $(PROJ_OBJ_ROOT)/tools/llvm-config
+
+$(ToolDir)/$(strip $(TOOLNAME))$(EXEEXT): $(LLVM_CONFIG)
+
+ProjLibsOptions += $(shell $(LLVM_CONFIG) --libs $(LINK_COMPONENTS))
+ProjLibsPaths += $(LLVM_CONFIG) \
+ $(shell $(LLVM_CONFIG) --libfiles $(LINK_COMPONENTS))
+endif
+endif
+