message: Skip the error makefile message when '-B' make flag is used
  (unconditionally make all targets)
diff: @@ -378,11 +378,15 @@ install: $(BLD)libmfem.a
  $(INSTALL) -m 640 $(SRC)config/test.mk $(PREFIX_SHARE)/test.mk
  $(CONFIG_MK):
  +# Skip the error message when '-B' make flag is used (unconditionally
  +# make all targets), but still checks for the $(CONFIG_MK) file
  +ifeq (,$(and $(findstring B,$(MAKEFLAGS)),$(wildcard $(CONFIG_MK))))
  $(info )
  $(info MFEM is not configured.)
  $(info Run "make config" first, or see "make help".)
  $(info )
  $(error )
  +endif
  config: $(if $(BUILD_DIR_DEF),build-config,local-config)
  