Precedence in target rules executed in parallel

[Riccardo Manfrin]

How to force precedence in target rules when invoking make with -jn with 
n>1 (on a multi core/threads machine)?

Let me clarify:

I have the following tagets/prerequisites rules:

all: $(MYLIB) TEST


$(MYLIB):
    ....

TEST:
    ...


With -j1 I get the library archived before the test. With -j8 I always 
get test done before the library (and therefore an error).

I could solve by putting $(MYLIB) as a prerequisite of TEST, but I don't 
want to pass through (=depend on) TEST for compiling the library. I 
would like to be able to exclude TEST on demand and stll compile the library

Thanks
RM