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Re: windows build help

From: Phillip Lord
Subject: Re: windows build help
Date: Sat, 14 Oct 2017 16:26:11 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.60 (gnu/linux)

Stephen Leake <address@hidden> writes:

> address@hidden (Phillip Lord) writes:
>> Stephen Leake <address@hidden> writes:
>>> address@hidden (Phillip Lord) writes:
>>>> Another solution would be to run both builds in parallel; this fails,
>>>> unfortunately, because the "out-of-source" build is not entirely out of
>>>> source -- the .elc files are created in-source. If I launch both a 64
>>>> and 32 bit build at the same time, they fight for whole compiles what,
>>>> until one or both crash.
>>> Have two source checkouts. then you could also build in-source, although
>>> I doubt that makes much difference.
>> I thought about that, but the reason against it is that it takes much
>> longer, because I have to build the elc twice.
> Hmm. You are implying that the elc built for 32 bit emacs are identical
> to the elc built for 64 bit emacs. 
> Is that true? I would have guessed that most objects are either
> 32 bit or 64 bit; elisp manual 3.1 says the integer range depends on the
> machine, and pointers should also.

Yes, I believe that they are. In fact, the source tar-ball includes the
ELC files, when it's possible to build from source on many different

I use to build both 32 and 64 totally form source (i.e. without ELC),
but haven't done for I think all of Emacs-25.

> If they are the same, then you should be able to write a script that
> does:
> 1) parallel make to build elc using 32 bit
> 2) parallel make to build everything else, both 32 bit and 64 bit.

I have this now, thanks to comments in this thread. I do, parallel build
of 64 bit, then parallel build of 32 bit. The ELC build happens during
the 64, although it could happen either way.


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