Provide a build option USE_LLVM_SHLIB to help JuliaLang#2494

Make.inc

@@ -32,9 +32,13 @@ USE_SYSTEM_LIBUV=0
 USE_MKL = 0
 MKLLIB = $(MKLROOT)/lib/intel64
 
+# Link to the LLVM shared library
+USE_LLVM_SHLIB = 0
+
 # Set to 1 to enable profiling with Intel VTune Amplifier
 USE_INTEL_JITEVENTS = 0
 
+# libc++ is standard on OS X 10.9, but not for earlier releases
 USE_LIBCPP = 0
 
 # we include twice to pickup user definitions better

src/Makefile

@@ -1,5 +1,6 @@
 JULIAHOME = $(abspath ..)
 include $(JULIAHOME)/Make.inc
+include $(JULIAHOME)/deps/Versions.make
 
 override CFLAGS += $(JCFLAGS)
 override CXXFLAGS += $(JCXXFLAGS)
@@ -15,7 +16,12 @@ FLAGS = \
  -I$(call exec,$(LLVM_CONFIG) --includedir) \
  -I$(LIBUV_INC) -I$(JULIAHOME)/usr/include
 
-LIBS = $(WHOLE_ARCHIVE) $(JULIAHOME)/src/flisp/libflisp.a $(WHOLE_ARCHIVE) $(JULIAHOME)/src/support/libsupport.a -L$(BUILD)/lib $(LIBUV) $(NO_WHOLE_ARCHIVE) $(call exec,$(LLVM_CONFIG) --libs) $(call exec,$(LLVM_CONFIG) --ldflags) $(OSLIBS)
+LLVMLINK = $(call exec,$(LLVM_CONFIG) --libs)
+ifeq ($(USE_LLVM_SHLIB),1)
+LLVMLINK = -lLLVM-$(LLVM_VER)
+endif
+
+LIBS = $(WHOLE_ARCHIVE) $(JULIAHOME)/src/flisp/libflisp.a $(WHOLE_ARCHIVE) $(JULIAHOME)/src/support/libsupport.a -L$(BUILD)/lib $(LIBUV) $(NO_WHOLE_ARCHIVE) $(call exec,$(LLVM_CONFIG) --ldflags) $(LLVMLINK) $(OSLIBS)
 
 ifneq ($(MAKECMDGOALS),debug)
 TARGET =