writing a makefile template to handle multiple c++ extensions

writing a makefile template to handle multiple c++ extensions

I am trying to work out how to write a makefile template that handles
multiple c++ extensions, for a given list of source files - but don't want
to have separate rules for each possible extension. Is this possible?
e.g.
TMP_CPPEXTS := cpp c++
TMP_OBJDIR := ~/objfiles
TMP_SOURCEFILES := foo.cpp bar.c++
TMP_BASENAMES := $(basename $(TMP_SOURCEFILES))
TMP_OBJFILES := $(addprefix $(TMP_OBJDIR)/, $(addsuffix .o, $(notdir
$(TMP_BASENAMES))))
TMP_DEPFILES :=$(addprefix $(TMP_OBJDIR)/, $(addsuffix .d, $(notdir
$(TMP_BASENAMES))))
BD_EXTFROMBASE = $(strip $(foreach TMP_EXT,$(2),$(foreach
TMP_NAME,$(1),$(if $(filter $(addsuffix
.$(TMP_EXT),$(TMP_NAME)),$(TMP_SOURCEFILES)),$(EXT)))))
$(TMP_OBJFILES) : $(TMP_OBJDIR)/%.o : %.$(call
BD_EXTFROMBASE,$*,$(TMP_CPPEXTS))
g++ -c $< -o $@
$(TMP_DEPFILES) : $(TMP_OBJDIR)/%.d : %.$(call
BD_EXTFROMBASE,$*,$(TMP_CPPEXTS))
g++ -m $< -o $@
I have verified that TMP_OBJFILES contains the expected object files, but
cant seem to get the rule itself to work? Any suggestions other than use
separate rules/macros?