+###############################################################################
+# Set up variables for building libararies
+###############################################################################
+
+#---------------------------------------------------------
+# Handle the special "JIT" value for LLVM_LIBS which is a
+# shorthand for a bunch of libraries that get the correct
+# JIT support for a library or a tool that runs JIT.
+#---------------------------------------------------------
+ifeq ($(firstword $(LLVMLIBS)),config)
+LLVM_CONFIG := $(LLVM_SRC_ROOT)/utils/llvm-config/llvm-config
+LLVMLIBS := $(shell $(LLVM_CONFIG) --libnames $(wordlist 2,9999,$(LLVMLIBS)))
+LLVMLIBS := $(patsubst lib%.a,%.a,$(LLVMLIBS))
+LLVMLIBS := $(patsubst %.o,%,$(LLVMLIBS))
+endif
+
+ifeq ($(LLVMLIBS),JIT)
+
+# Make sure we can get our own symbols in the tool
+Link += -dlopen self
+
+# Generic JIT libraries
+JIT_LIBS := LLVMInterpreter LLVMJIT LLVMSelectionDAG.a LLVMCodeGen.a \
+ LLVMExecutionEngine
+
+# You can enable the X86 JIT on a non-X86 host by setting the flag
+# ENABLE_X86_JIT on the make command line. If not, it will still be
+# enabled automagically on an X86 host.
+ifeq ($(ARCH), x86)
+ ENABLE_X86_JIT = 1
+endif
+
+# What the X86 JIT requires
+ifdef ENABLE_X86_JIT
+ JIT_LIBS += LLVMX86
+endif
+
+# You can enable the PowerPC JIT on a non-PowerPC host by setting the flag
+# ENABLE_PPC_JIT on the make command line. If not, it will still be
+# enabled automagically on an PowerPC host.
+ifeq ($(ARCH), PowerPC)
+ ENABLE_PPC_JIT = 1
+endif
+
+# What the PowerPC JIT requires
+ifdef ENABLE_PPC_JIT
+ JIT_LIBS += LLVMPowerPC
+endif
+
+# You can enable the Alpha JIT on a non-Alpha host by setting the flag
+# ENABLE_ALPHA_JIT on the make command line. If not, it will still be
+# enabled automagically on an Alpha host.
+ifeq ($(ARCH), Alpha)
+ ENABLE_ALPHA_JIT = 1
+endif
+
+# What the Alpha JIT requires
+ifdef ENABLE_ALPHA_JIT
+ JIT_LIBS += LLVMAlpha
+endif
+
+LLVMLIBS := $(JIT_LIBS) LLVMScalarOpts.a LLVMTransformUtils.a LLVMAnalysis.a \
+ LLVMBCReader.a LLVMTarget.a LLVMCore.a LLVMSupport.a LLVMbzip2.a \
+ LLVMSystem.a $(PLATFORMLIBDL)
+endif
+
+#---------------------------------------------------------
+# 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).
+#---------------------------------------------------------
+
+ProjLibsOptions := $(patsubst %.a.o, -l%, $(addsuffix .o, $(USEDLIBS)))
+ProjLibsOptions := $(patsubst %.o, $(LibDir)/%.o, $(ProjLibsOptions))
+LLVMLibsOptions := $(patsubst %.a.o, -l%, $(addsuffix .o, $(LLVMLIBS)))
+LLVMLibsOptions := $(patsubst %.o, $(LLVMLibDir)/%.o, $(LLVMLibsOptions))
+ProjUsedLibs := $(patsubst %.a.o, lib%.a, $(addsuffix .o, $(USEDLIBS)))
+LLVMUsedLibs := $(patsubst %.a.o, lib%.a, $(addsuffix .o, $(LLVMLIBS)))
+ProjLibsPaths := $(addprefix $(LibDir)/,$(ProjUsedLibs))
+LLVMLibsPaths := $(addprefix $(LLVMLibDir)/,$(LLVMUsedLibs))
+