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Re: [Qemu-devel] Parallel make build fails on fast machine

From: Philippe Mathieu-Daudé
Subject: Re: [Qemu-devel] Parallel make build fails on fast machine
Date: Mon, 8 Jul 2019 12:17:12 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0

On 7/8/19 11:41 AM, Daniel P. Berrangé wrote:
> On Sat, Jul 06, 2019 at 09:35:30PM +0100, Peter Maydell wrote:
>> On Sat, 6 Jul 2019 at 11:28, Mark Cave-Ayland
>> <address@hidden> wrote:
>>> On 06/07/2019 11:16, Peter Maydell wrote:
>>>> If you just do 'make' rather than 'make install' does it fail the same way?
>>> Interesting. A quick test shows that "make V=1 -j2" works fine, it's just 
>>> "make V=1
>>> -j2 install" which is failing.
>> Mmm. I suspect most people just do the plain make (with the make install
>> phase either never or as a second command afterwards), so missing-dependency
>> bugs between the install targets and the build targets are probably more
>> likely to lurk around. We should stil fix them, though, assuming we
>> can track them down...
> The main 'install' target depends on 'all':
> install: all $(if $(BUILD_DOCS),install-doc) install-datadir 
> install-localstatedir \
> but I think still allows 'install-doc', 'install-datadir' and
> 'install-localstatedir'  to parallelize wrt 'all'. I guess the fix is to
> make each of those 'install-xxx' targets depend on 'all' instead.

I'm not sure I follow, are you suggesting this as a kludge for this
release, or you recommend this as a default?

Apparently only 'recurse-install' depends of 'all'.

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