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Date: Mon, 13 Sep 2004 09:39:35 +0300
From: Ruslan Ermilov <ru@FreeBSD.org>
To: Maxim Sobolev <sobomax@portaone.com>
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Subject: Re: ccache support for make buildworld/make release
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On Sun, Sep 12, 2004 at 10:57:29PM +0300, Maxim Sobolev wrote:
> I have in mind extension for ccache which would allow it to be used with=
=20
> buildworld. Instead of using hashed values of compiler binary size and=20
> its last modification time, ccache should be using hash of the compiler=
=20
> binary. To avoid hashing several megabytes worth image on each=20
> invocation, compiler binary hash value can be by itself cached using=20
> hashed values of compiler binary size and its last modification time.=20
>=20
That would work, indeed.  :-)

> Since linking the same objects from the cache is likely to produce the=20
> same binary, bootstrap compiler generated on the second ccached=20
> buildworld will be the same as one generated on the first one.
>=20
Even not from cache:

# cd /usr/obj/usr/home/src/RELENG_4/gnu/usr.bin/cc/cc1/
# strip cc1
# md5 ./cc1 /usr/libexec/cc1
MD5 (./cc1) =3D 32173c94754290242a6b026cf96ce108
MD5 (/usr/libexec/cc1) =3D 32173c94754290242a6b026cf96ce108


Cheers,
--=20
Ruslan Ermilov
ru@FreeBSD.org
FreeBSD committer

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