message: add backslash replacingin compile and link
diff: @@ -37,8 +37,8 @@ endif
  %$(EXE) : %.hpp $(CMDSTAN_MAIN_O) $(LIBSUNDIALS) $(MPI_TARGETS)
  @echo ''
  @echo '--- Compiling, linking C++ code ---'
  - $(COMPILE.cpp) $(CXXFLAGS_PROGRAM) -x c++ -o $*.o $<
  - $(LINK.cpp) $*.o $(CMDSTAN_MAIN_O) $(LDLIBS) $(LIBSUNDIALS) $(MPI_TARGETS) $(OUTPUT_OPTION)
  + $(COMPILE.cpp) $(CXXFLAGS_PROGRAM) -x c++ -o $(subst \,/,$*).o $(subst \,/,$<)
  + $(LINK.cpp) $(subst \,/,$*).o $(CMDSTAN_MAIN_O) $(LDLIBS) $(LIBSUNDIALS) $(MPI_TARGETS) $(subst \,/,$(OUTPUT_OPTION))
  ##
  