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Passing -j (parallel processing) option to sub-makes


From: Nestor Amaya
Subject: Passing -j (parallel processing) option to sub-makes
Date: Fri, 1 Mar 2002 14:43:00 -0500

Fellow GNU-makers:

Is there a way to get gmake to distribute parallel jobs between sub-makes?
For example, given:

                all : a b c

                a b c:
                        $(MAKE) -C $@


Now assume that each sub-make (a b c) can at most run 4 parallel jobs at
once. Would running "make -j 10 all" with the above makefile still manage to
run 10 jobs in parallel? Or only 3? What is the entended behaviour of make
here?

I have tested this but have seen conflicting results (which may be due to
the complexities of my environment).

Thank you,
_______________________________________________________
Nestor A. Amaya                     Catena Networks
I.C. Development                    307 Legget Drive
                                    Kanata, ON
voice 1: (613) 599-6430 x8255       K2K 3C8
voice 2: (613) 599-4166
    fax: (613) 599-0445





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