Thank you for your answer. But the problem is that "test" is an executable file, it is not a shared-obj. I cannot resolve myprints's symbols in libhelloworld.so. However I have tried to do this in helloworld.o: 
helloworld.o :    helloworld.c
                  $(CC) -Wall -fPIC -I$(PERLCORE) -I. -c helloworld.c 
+-Wl,-rpath,$(EXTLIB_PATH) -o $@ -L$(EXTLIB_PATH) -lmyprint

[download]
without success. What do you suggest me?

In reply to Re^2: shared-obj linking in xs-module by warlock
in thread shared-obj linking in xs-module by warlock

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