From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas@monjalon.net>
Subject: Re: [PATCH v7 6/6] mk: install symlinks before build step
Date: Thu, 12 Oct 2017 04:58:09 +0200
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References: <20170905205159.8606-7-luca.boccassi@gmail.com>
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05/09/2017 22:51, luca.boccassi@gmail.com:
>  .PHONY: install
> +ifeq ($(SYMLINK-FILES-y),)
>  install: build _postinstall
> +else
> +install: _preinstall build _postinstall
> +endif

I think you cannot be sure that "_preinstall" will be finished
before the "build" target starts in parallel make.
Am I missing something?