Makefile with multiple values for a parameter - makefile

Question

Currently, I am working on a makefile that takes a parameter "CLASS=xxx" and then compiles and does stuff with that value.
In the end, it runs an application ($APP) on a bunch of files.
I enter this command:
make default CLASS=Test_UART
and the makefile processes it thusly:
pc: $(APP)
make -C BUILDENV CLASS=$(CLASS) BUILD=just_filelist OUTPUT=filelist.txt SKIPSELF=yes
../classCvt/classCvt <./Applications/$(CLASS).class> ./Applications/$(CLASS).ujc
time -p ./$(APP) ./Applications/$(CLASS).ujc `cat filelist.txt`
Hence it calls a makefile in my BUILDENV folder which does the following:
#USAGE: make -C <PATH_TO_THIS_FILES_PARENT_DIR> CLASS=<MY_JAVA_FILE_NAME_WITHOUT_JAVA_EXTENSION> OUT=<OUTPUT_FILE_NAME>
SELF := $(dir $(CURDIR)/$(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST)))
CLASS ?= PLEASE_SPECIFY_CLASS_PARAM
DIR := $(PWD)#print working directory
CCVT ?= $(SELF)/../../classCvt/classCvt
TOBIN ?= $(SELF)/../../classCvt/tobin
OUTPUT ?=
### Comment: Defining CMD.
ifeq ($(BUILD), just_filelist)
CMD = echo
else
ifeq ($(BUILD), PC)
CMD = echo
else
ifeq ($(BUILD), unopt)
CMD = $(TOBIN)
else
### Comment: Optimized CMD = tobin -c ccvt
CMD = $(TOBIN) -c $(CCVT)
endif
endif
endif
ifeq ($(OUTPUT), )
OUT = &1
else
OUT = $(DIR)/$(OUTPUT)
endif
ifeq ($(SKIPSELF), yes)
MYCLASS =
else
MYCLASS = $(DIR)/Applications/$(CLASS).class
endif
all:
CLASSPATH=$(SELF)/RT/real:$(SELF)/RT/fake:$(DIR) javac $(DIR)/Applications/$(CLASS).java
find $(SELF)/RT/real -iname "*.class" -type f > $(SELF)/files
ls $(DIR)/Applications/*.class | grep -v "$(CLASS)\.class" >> $(SELF)/files || true
cat $(SELF)/files | xargs $(CMD) $(MYCLASS) >$(OUT)
rm -f $(SELF)/files
What I would like to do is give a command like:
make default CLASS=Test1,Test2,Test3
and the makefile to process it for the 3 classes and put the given classes in a .txt and the default classes in a different .txt, something like this like this:
pc: $(APP)
make -C BUILDENV default_classes BUILD=list_default_classes OUTPUT=list_default_classes.txt
# make -C BUILDENV given_classes BUILD=list_given_classes OUTPUT=list_given_classes.txt CLASS=$(CLASS) SKIPSELF=yes
../classCvt/classCvt `cat list_given_classes.txt`./Applications/$(CLASS).ujc
#here the list_given_classes should now contain the .ujc files
time -p ./$(APP) `cat list_given_classes.txt` `cat list_default_classes.txt`
and for the makefile in the BUILDENV, I expect something like:
default_classes:
CLASSPATH=$(SELF)/RT/real:$(SELF)/RT/fake:$(DIR)
find $(SELF)/RT/real -iname "*.class" -type f > $(SELF)/files
ls $(DIR)/Applications/*.class | grep -v "$(CLASS1)\.class" "$(CLASS2)\.class">> $(SELF)/files || true
cat $(SELF)/files | xargs $(CMD) >$(OUT)
rm -f $(SELF)/files
given_classes:
javac $(DIR)/Applications/$(CLASS).java
find $(SELF)/RT/real -iname "*.class" -type f > $(SELF)/files
ls $(DIR)/Applications/*.class | grep -v "$(CLASS)\.class" >> $(SELF)/files || true
cat $(SELF)/files | xargs $(CMD) $(MYCLASS) >$(OUT)
rm -f $(SELF)/files
However, I'm not sure how to do this for a CLASS parameter containing multiple classes.
I'm thinking to try and parse the Test1,Test2,Test3 value into a list of 1,2,3 and then iterating over it. But no clue if this is a good way and even on how to do it.
What do you guys suggest?

Answer 1

Pretty way:
pc: $(APP)
define BUILD_CLASS
pc: pc-$(CLASS_SPLIT)
pc-$(CLASS_SPLIT):
make -C BUILDENV CLASS=$(CLASS_SPLIT) BUILD=just_filelist OUTPUT=filelist.txt SKIPSELF=yes
../classCvt/classCvt <./Applications/$(CLASS_SPLIT).class> ./Applications/$(CLASS_SPLIT).ujc
time -p ./$(APP) ./Applications/$(CLASS_SPLIT).ujc `cat filelist.txt`
endef
CLASSES := $(shell echo $(CLASS) | tr ',' ' ')
$(foreach CLASS_SPLIT, $(CLASSES), $(eval $(BUILD_CLASS)))

Answer 2

Simple way:
pc: $(APP)
$(foreach C, $(shell echo $(CLASS) | tr ',' ' '), \
make -C BUILDENV CLASS=$(C) BUILD=just_filelist OUTPUT=filelist.txt SKIPSELF=yes && \
../classCvt/classCvt <./Applications/$(C).class> ./Applications/$(C).ujc && \
time -p ./$(APP) ./Applications/$(C).ujc `cat filelist.txt` &&) true