.PHONY: all clean force

all : app

app : aux.o main.o
        $(CC) -o $@ $^

VPATH=a/aux

aux.o : aux.c

main.o : main.c version.h

version.h : force
        ( export LANG=C; \
            echo -n 'const char VERSION[] = "'; \
            { \
                svn info; \
                svn status | grep -v '^?'; \
            } | tr \\n @ | sed -e s/@/\\\\n/g ; \
            echo '";'; \
        ) > $@.tmp
        cmp -s $@.tmp $@ || mv $@.tmp $@

force:

clean:
        rm -f *.o version.h{,.tmp}