Fix pr4820: Don't run llvm-config during "make clean" since it may have
already been removed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81547 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/bindings/ocaml/Makefile.ocaml b/bindings/ocaml/Makefile.ocaml
index d98a489..c46f602 100644
--- a/bindings/ocaml/Makefile.ocaml
+++ b/bindings/ocaml/Makefile.ocaml
@@ -31,13 +31,16 @@
 OcamlDir := $(LibDir)/ocaml
 
 # Info from llvm-config and similar
+ifndef IS_CLEANING_TARGET
 ifdef UsedComponents
 UsedLibs = $(shell $(LLVM_CONFIG) --libs $(UsedComponents))
 UsedLibNames = $(shell $(LLVM_CONFIG) --libnames $(UsedComponents))
 endif
+endif
 
 # Tools
 OCAMLCFLAGS += -I $(ObjDir) -I $(OcamlDir)
+ifndef IS_CLEANING_TARGET
 ifneq ($(ObjectsO),)
 OCAMLAFLAGS += $(patsubst %,-cclib %, \
                  $(filter-out -L$(LibDir),-l$(LIBRARYNAME) \
@@ -48,6 +51,7 @@
                  $(filter-out -L$(LibDir),$(shell $(LLVM_CONFIG) --ldflags)) \
                                           $(UsedLibs))
 endif
+endif
  
 # -g was introduced in 3.10.0.
 #ifneq ($(ENABLE_OPTIMIZED),1)