Re: bug#47615: [PATCH 1/9] gnu: bootstrap: Add support for powerpc-linux.
Hi Chris, Chris Marusich skribis: > Chris Marusich writes: > >> Efraim Flashner writes: >> >>> On 923bb70a1bff657125c3008f119a477e5cb57c2b >>>gnu:glibc-for-bootstrap: Fix patch. >>> >>> Run >>> ./pre-inst-env guix build --target=powerpc-linux-gnu bootstrap-tarballs > g>> >>> Producing >>> >>> /gnu/store/dyj1wvayyp1ihaknkxniz1xamcf4yrhl-bootstrap-tarballs-0 >>> >>> With guix hash -rx >>> /gnu/store/dyj1wvayyp1ihaknkxniz1xamcf4yrhl-bootstrap-tarballs-0 >>> >>> 02xx2ydj28pwv3vflqffinpq1icj09gzi9icm8j4bwc4lca9irxn >> >> Generally speaking, this patch looks fine to me. Just curious, what >> sort of machines does one use for 32-bit powerpc? >> >> I want to build the bootstrap binaries, see if they're reproducible (in >> particular GCC, which I suspect won't be), and verify the hashes. >> >> It might take a few days to do that, but I'll update this thread once >> I've done it. > > I repeated Efraim's steps on two different x86_64-linux Guix System > machines. In both cases, it produced exactly the same hash. Therefore, > it would seem these bootstrap binaries are actually reproducible. This is great news, thanks for checking! With this, we can be more confident uploading the binary seeds to ftp.gnu.org. > I was surprised by this because of my experience with bug 41669. I > expected GCC to not be reproducible, but in this case it seems > reproducible. Yes, that’s weird, but it’s better this way. :-) Thanks, Ludo’.
Re: bug#47615: [PATCH 1/9] gnu: bootstrap: Add support for powerpc-linux.
On Tue, May 04, 2021 at 06:52:31PM -0700, Chris Marusich wrote: > Chris Marusich writes: > > > Efraim Flashner writes: > > > >> On 923bb70a1bff657125c3008f119a477e5cb57c2b > >>gnu:glibc-for-bootstrap: Fix patch. > >> > >> Run > >> ./pre-inst-env guix build --target=powerpc-linux-gnu bootstrap-tarballs > g>> > >> Producing > >> > >> /gnu/store/dyj1wvayyp1ihaknkxniz1xamcf4yrhl-bootstrap-tarballs-0 > >> > >> With guix hash -rx > >> /gnu/store/dyj1wvayyp1ihaknkxniz1xamcf4yrhl-bootstrap-tarballs-0 > >> > >> 02xx2ydj28pwv3vflqffinpq1icj09gzi9icm8j4bwc4lca9irxn > > > > Generally speaking, this patch looks fine to me. Just curious, what > > sort of machines does one use for 32-bit powerpc? > > > > I want to build the bootstrap binaries, see if they're reproducible (in > > particular GCC, which I suspect won't be), and verify the hashes. > > > > It might take a few days to do that, but I'll update this thread once > > I've done it. > > I repeated Efraim's steps on two different x86_64-linux Guix System > machines. In both cases, it produced exactly the same hash. Therefore, > it would seem these bootstrap binaries are actually reproducible. I was > surprised by this because of my experience with bug 41669. I expected > GCC to not be reproducible, but in this case it seems reproducible. > > I wonder what's different? The powerpc64 architecture is 64-bit, and > powerpc is 32-bit, but I wonder what else might be different that could > cause the non-reproducibility to occur only in the powerpc64-linux > case. > > Anyway, this is good news for the powerpc-linux port. It is also an > interesting clue for the investigation of bug 41669, but further > discussion about that should go there, not here. > In terms of what is more relevant here, IIRC there is some CI code to build cross toolchain stuff to powerpc-linux-gnu. Is it possible that you reused some of that? I don't remember exactly from the other bug report which bits suddenly made the difference. Otherwise I built mine about 4 months earlier. -- Efraim Flashner אפרים פלשנר GPG key = A28B F40C 3E55 1372 662D 14F7 41AA E7DC CA3D 8351 Confidentiality cannot be guaranteed on emails sent or received unencrypted signature.asc Description: PGP signature
Re: bug#47615: [PATCH 1/9] gnu: bootstrap: Add support for powerpc-linux.
Chris Marusich writes: > Efraim Flashner writes: > >> On 923bb70a1bff657125c3008f119a477e5cb57c2b >>gnu:glibc-for-bootstrap: Fix patch. >> >> Run >> ./pre-inst-env guix build --target=powerpc-linux-gnu bootstrap-tarballs g>> >> Producing >> >> /gnu/store/dyj1wvayyp1ihaknkxniz1xamcf4yrhl-bootstrap-tarballs-0 >> >> With guix hash -rx >> /gnu/store/dyj1wvayyp1ihaknkxniz1xamcf4yrhl-bootstrap-tarballs-0 >> >> 02xx2ydj28pwv3vflqffinpq1icj09gzi9icm8j4bwc4lca9irxn > > Generally speaking, this patch looks fine to me. Just curious, what > sort of machines does one use for 32-bit powerpc? > > I want to build the bootstrap binaries, see if they're reproducible (in > particular GCC, which I suspect won't be), and verify the hashes. > > It might take a few days to do that, but I'll update this thread once > I've done it. I repeated Efraim's steps on two different x86_64-linux Guix System machines. In both cases, it produced exactly the same hash. Therefore, it would seem these bootstrap binaries are actually reproducible. I was surprised by this because of my experience with bug 41669. I expected GCC to not be reproducible, but in this case it seems reproducible. I wonder what's different? The powerpc64 architecture is 64-bit, and powerpc is 32-bit, but I wonder what else might be different that could cause the non-reproducibility to occur only in the powerpc64-linux case. Anyway, this is good news for the powerpc-linux port. It is also an interesting clue for the investigation of bug 41669, but further discussion about that should go there, not here. -- Chris signature.asc Description: PGP signature
Re: bug#47615: [PATCH 1/9] gnu: bootstrap: Add support for powerpc-linux.
On Wed, Apr 14, 2021 at 09:36:24AM +0200, Vincent Legoll wrote: > Hello, > > On Wed, Apr 14, 2021 at 5:51 AM Chris Marusich wrote: > > Generally speaking, this patch looks fine to me. Just curious, what > > sort of machines does one use for 32-bit powerpc? > > Old apple hardware based on powerpc G4 (powermacs, mini, imac, etc.), > maybe even G3. There are a couple families of 32-bit powerpc machines out there with (IIRC) macppc being the most prevalent for desktops. > > > Any ideas for how we can get a machine for powerpc CI? Maybe VMs, I > > guess? Can a POWER9 machine be a powerpc-linux machine...? > > A VM on power9 may be able to run BE ppc32. > Can it do it "directly" or does it need to be inside of a VM/chroot? I never looked too much into it, never quite seemed like something that I'd be able to take advantage of. -- Efraim Flashner אפרים פלשנר GPG key = A28B F40C 3E55 1372 662D 14F7 41AA E7DC CA3D 8351 Confidentiality cannot be guaranteed on emails sent or received unencrypted signature.asc Description: PGP signature
Re: bug#47615: [PATCH 1/9] gnu: bootstrap: Add support for powerpc-linux.
Hello, On Wed, Apr 14, 2021 at 5:51 AM Chris Marusich wrote: > Generally speaking, this patch looks fine to me. Just curious, what > sort of machines does one use for 32-bit powerpc? Old apple hardware based on powerpc G4 (powermacs, mini, imac, etc.), maybe even G3. > Any ideas for how we can get a machine for powerpc CI? Maybe VMs, I > guess? Can a POWER9 machine be a powerpc-linux machine...? A VM on power9 may be able to run BE ppc32. Regards -- Vincent Legoll
Re: bug#47615: [PATCH 1/9] gnu: bootstrap: Add support for powerpc-linux.
Efraim Flashner writes:
> On 923bb70a1bff657125c3008f119a477e5cb57c2b
>gnu:glibc-for-bootstrap: Fix patch.
>
> Run
> ./pre-inst-env guix build --target=powerpc-linux-gnu bootstrap-tarballs
>
> Producing
>
> /gnu/store/dyj1wvayyp1ihaknkxniz1xamcf4yrhl-bootstrap-tarballs-0
>
> With guix hash -rx
> /gnu/store/dyj1wvayyp1ihaknkxniz1xamcf4yrhl-bootstrap-tarballs-0
>
> 02xx2ydj28pwv3vflqffinpq1icj09gzi9icm8j4bwc4lca9irxn
Generally speaking, this patch looks fine to me. Just curious, what
sort of machines does one use for 32-bit powerpc?
I want to build the bootstrap binaries, see if they're reproducible (in
particular GCC, which I suspect won't be), and verify the hashes.
It might take a few days to do that, but I'll update this thread once
I've done it.
> @@ -139,6 +148,7 @@
>;; This is where the bootstrap executables come from.
>
> '("https://git.savannah.gnu.org/cgit/guix.git/plain/gnu/packages/bootstrap/;
> "https://alpha.gnu.org/gnu/guix/bootstrap/;
> +"http://flashner.co.il/guix/bootstrap/;
> "http://lilypond.org/janneke/guix/;))
Once you're reasonably sure the bootstrap binaries won't change, we
should consider uploading them to alpha.gnu.org. Ludo did it for me for
powerpc64le-linux but I don't know who has access (I don't).
> (define %hurd-systems
>;; The GNU/Hurd systems for which support is being developed.
> @@ -361,7 +361,7 @@ name of its URI."
>;;
>;; XXX: MIPS is unavailable in CI:
>;; .
> - (fold delete %supported-systems '("mips64el-linux")))
> + (fold delete %supported-systems '("mips64el-linux" "powerpc-linux")))
Any ideas for how we can get a machine for powerpc CI? Maybe VMs, I
guess? Can a POWER9 machine be a powerpc-linux machine...?
--
Chris
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