.POSIX:

# by default we use system nm but make does not provide nm
NM= nm
MKDIR= mkdir -p

ALL_DOCTEST_O= chatprotocol.doctest
ALL_CODE_O= chatprotocol.code

.SUFFIXES:

default: all

all: chatprotocol doc doctest

chatprotocol: $(ALL_CODE_O)
	$(CC) $(CFLAGS) $(LDFLAGS) -o chatprotocol $(ALL_CODE_O)

doc: doc.o doctest.a
	$(CC) $(CFLAGS) $(LDFLAGS) -o doc doc.o doctest.a

doctest: doctest.o doctest.a
	$(CC) $(CFLAGS) $(LDFLAGS) -o doctest doctest.o doctest.a

doc.o: doc.c doctest.h doctest.declare doctest.include
	$(CC) $(CFLAGS) -DDOCS -UDOCTEST -c doc.c

doctest.o: doctest.c doc.c doctest.h doctest.declare doctest.include
	$(CC) $(CFLAGS) -DDOCTEST -c doctest.c

doctest.declare: doctest.a
	$(NM) -P -g $? | sed -n -e 's/^\([^[:blank:]]*_mkdocs\)[[:blank:]]..*/extern void \1(struct docs *doc);/p' > $@

doctest.include: doctest.a
	$(NM) -P -g $? | sed -n -e 's/^\([^[:blank:]]*_mkdocs\)[[:blank:]]..*/\1(\&doc);/p' > $@

doctest.a: $(ALL_DOCTEST_O)
	$(MKDIR) $(@D)/doctestobj
	for file in $(?:.doctest=); do cp -p $$file.doctest $(@D)/doctestobj/$$(basename $$file).o; done
	cd $(@D)/doctestobj && $(AR) $(ARFLAGS) -u ../$(@F) $(ALL_DOCTEST_O:.doctest=.o)

.SUFFIXES: .c .doctest .code

.c.doctest:
	$(CC) $(CFLAGS) -DDOCTEST -c $<
	mv $*.o $*.doctest

.c.code:
	$(CC) $(CFLAGS) -UDOCS -UDOCTEST -c $<
	mv $*.o $*.code