GNU bug report logs - #42327
'%current-system' value influences 'bag-transitive-inputs'

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Jan Nieuwenhuizen <janneke <at> gnu.org>
Subject: bug#42327: closed (Re: bug#42327: Offload build to Childhurd
 selects linux-libre-headers)
Date: Mon, 13 Jul 2020 14:53:02 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#42327: '%current-system' value influences 'bag-transitive-inputs'

which was filed against the guix package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 42327 <at> debbugs.gnu.org.

-- 
42327: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=42327
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Ludovic Courtès <ludo <at> gnu.org>
To: Jan Nieuwenhuizen <janneke <at> gnu.org>
Cc: 42327-done <at> debbugs.gnu.org
Subject: Re: bug#42327: Offload build to Childhurd selects linux-libre-headers
Date: Mon, 13 Jul 2020 16:52:02 +0200

[Message part 3 (text/plain, inline)]

Hi!

Jan Nieuwenhuizen <janneke <at> gnu.org> skribis:

> With static-bash-for-glibc, however, it goes off track
>
> $ ./pre-inst-env guix build --system=i586-gnu \
>    -e '(@@ (gnu packages commencement) static-bash-for-glibc)'
> The following derivations will be built:
>    /gnu/store/gv40jpz4g0hbia28wa6d50z9x6ncgdlh-bash-static-5.0.16.drv
>    /gnu/store/apj2ihazv6x3anhvfvmmqrkyak05p9yc-gcc-cross-boot0-wrapped-7.5.0.drv
>    /gnu/store/yfpy5b3xqkarxchyhi339fw2ldwczj1d-linux-libre-headers-5.4.20.drv
>
>
> ...oops!  Note that a native build on the Childhurd works all the way up
> to "hello".
>
> The "glibc-final-with-bootstrap-bash" has a propagated-inputs that looks
> like this
>
> (define* (kernel-headers-boot0 #:optional (system (%current-system)))
>   (match system
>     ("i586-gnu" hurd-core-headers-boot0)
>     (_ linux-libre-headers-boot0)))
>
> (define glibc-final-with-bootstrap-bash
>    [..]
>    (propagated-inputs `(("kernel-headers" ,(kernel-headers-boot0))))
>    [..])
>
> In KERNEL-HEADERS-BOOT0, SYSTEM is "x86_64-linux".  Passing SYSTEM from
> a LET-SYSTEM clause (see attached patch) seems to fix this...but i'm
> afraid that triggers a world rebuild.  Our offload Childhurds can only
> run master, right?  Is there any way around this?  Thoughts?

Here’s my powerful debugging trick for such dynamic binding issues (it’s
not related to offloading):

[Message part 4 (text/x-patch, inline)]

diff --git a/gnu/packages/commencement.scm b/gnu/packages/commencement.scm
index d0393ebe25..5ec7facd02 100644
--- a/gnu/packages/commencement.scm
+++ b/gnu/packages/commencement.scm
@@ -3116,6 +3116,9 @@ memoized as a function of '%current-system'."
               ,@(%boot0-inputs)))))
 
 (define* (kernel-headers-boot0 #:optional (system (%current-system)))
+  (when (string=? system "x86_64-linux")
+    (pk system)
+    (display-backtrace (make-stack #t) (current-error-port) #f 80))
   (match system
     ("i586-gnu" hurd-core-headers-boot0)
     (_ linux-libre-headers-boot0)))

[Message part 5 (text/plain, inline)]

That gives me this:

--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix build -s i586-gnu hello -d --no-grafts

;;; ("x86_64-linux")
In ice-9/boot-9.scm:
  1736:10 30 (with-exception-handler _ _ #:unwind? _ #:unwind-for-type _)
In unknown file:
          29 (apply-smob/0 #<thunk 7f59f45ab580>)
In ice-9/boot-9.scm:
    718:2 28 (call-with-prompt _ _ #<procedure default-prompt-handler (k proc)>)
In ice-9/eval.scm:
    619:8 27 (_ #(#(#<directory (guile-user) 7f59f41e8f00>)))
In guix/ui.scm:
  1953:12 26 (run-guix-command _ . _)
    663:2 25 (call-with-error-handling _)
In ice-9/boot-9.scm:
  1736:10 24 (with-exception-handler _ _ #:unwind? _ #:unwind-for-type _)
  1731:15 23 (with-exception-handler #<procedure 7f59f1f734b0 at ice-9/boot-9.scm:1815:7 (exn)> _ #:unwind? _ # _)
In guix/status.scm:
    776:4 22 (call-with-status-report _ _)
In ice-9/boot-9.scm:
  1736:10 21 (with-exception-handler _ _ #:unwind? _ #:unwind-for-type _)
In guix/store.scm:
   631:22 20 (thunk)
   1299:8 19 (call-with-build-handler #<procedure 7f59f1f8c930 at guix/ui.scm:1069:2 (continue store things mod…> …)
In guix/scripts/build.scm:
    925:2 18 (_)
In ice-9/boot-9.scm:
  1731:15 17 (with-exception-handler #<procedure 7f59e300e750 at ice-9/boot-9.scm:1815:7 (exn)> _ #:unwind? _ # _)
  1736:10 16 (with-exception-handler _ _ #:unwind? _ #:unwind-for-type _)
In guix/ui.scm:
    440:6 15 (_)
In guix/scripts/build.scm:
    927:5 14 (_)
In srfi/srfi-1.scm:
   673:15 13 (append-map #<procedure 7f59e3015dc0 at guix/scripts/build.scm:927:17 (system)> ("i586-gnu"))
   586:17 12 (map1 ("i586-gnu"))
In guix/scripts/build.scm:
   929:20 11 (_ _)
In guix/store.scm:
   1340:2 10 (map/accumulate-builds #<store-connection 256.99 7f59f1fb09b0> _ _)
In srfi/srfi-1.scm:
   586:17  9 (map1 (#<package hello <at> 2.10 gnu/packages/base.scm:74 7f59e57f0820>))
In guix/store.scm:
   1299:8  8 (call-with-build-handler #<procedure build-accumulator (continue store things mode)> _)
In guix/scripts/build.scm:
   888:18  7 (_ _)
In guix/packages.scm:
  1075:16  6 (package-derivation _ #<package hello <at> 2.10 gnu/packages/base.scm:74 7f59e57f0820> _ #:graft? _)
  1393:22  5 (thunk)
    927:4  4 (bag->derivation #<store-connection 256.99 7f59f1fb09b0> #<<bag> name: "hello-2.10" system: "i586-…> …)
   812:23  3 (transitive-inputs _)
In gnu/packages/commencement.scm:
  3304:44  2 (propagated-inputs #<package glibc-intermediate <at> 2.31 gnu/packages/commencement.scm:3263 7f59e6856d20>)
  3121:23  1 (kernel-headers-boot0 _)
In unknown file:
           0 (make-stack #t)
--8<---------------cut here---------------end--------------->8---

At that point, it looks like a déjà-vu to me.  :-)

Should be fixed with efb10f175fa6323024aa471c58ea1da445085298.

Thanks,
Ludo’.

[Message part 6 (message/rfc822, inline)]

From: Jan Nieuwenhuizen <janneke <at> gnu.org>
To: bug-guix <at> gnu.org
Subject: Offload build to Childhurd selects linux-libre-headers
Date: Sun, 12 Jul 2020 00:01:54 +0200

[Message part 7 (text/plain, inline)]

Hi!

The offload build works, yay!...all the way up to

--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix build --system=i586-gnu \
   -e '(@@ (gnu packages commencement) glibc-final-with-bootstrap-bash)'
/gnu/store/cah6lzl8cxdhfink3a1ij0m1p5vk66kw-glibc-intermediate-2.31-debug
/gnu/store/i7l6dnq6br3jg5qzhfssrp11mg499d2b-glibc-intermediate-2.31
/gnu/store/lr2ymww5imjl3hxrzyc7dmsadw7dxbdh-glibc-intermediate-2.31-static
--8<---------------cut here---------------end--------------->8---

With static-bash-for-glibc, however, it goes off track

--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix build --system=i586-gnu \
   -e '(@@ (gnu packages commencement) static-bash-for-glibc)'
The following derivations will be built:
   /gnu/store/gv40jpz4g0hbia28wa6d50z9x6ncgdlh-bash-static-5.0.16.drv
   /gnu/store/apj2ihazv6x3anhvfvmmqrkyak05p9yc-gcc-cross-boot0-wrapped-7.5.0.drv
   /gnu/store/yfpy5b3xqkarxchyhi339fw2ldwczj1d-linux-libre-headers-5.4.20.drv
--8<---------------cut here---------------end--------------->8---

...oops!  Note that a native build on the Childhurd works all the way up
to "hello".

The "glibc-final-with-bootstrap-bash" has a propagated-inputs that looks
like this

--8<---------------cut here---------------start------------->8---
(define* (kernel-headers-boot0 #:optional (system (%current-system)))
  (match system
    ("i586-gnu" hurd-core-headers-boot0)
    (_ linux-libre-headers-boot0)))

(define glibc-final-with-bootstrap-bash
   [..]
   (propagated-inputs `(("kernel-headers" ,(kernel-headers-boot0))))
   [..])
--8<---------------cut here---------------end--------------->8---

In KERNEL-HEADERS-BOOT0, SYSTEM is "x86_64-linux".  Passing SYSTEM from
a LET-SYSTEM clause (see attached patch) seems to fix this...but i'm
afraid that triggers a world rebuild.  Our offload Childhurds can only
run master, right?  Is there any way around this?  Thoughts?

Greetings,
--a-mildly-disappointed--
Janneke

[0001-commencement-glibc-final-with-bootstrap-bash-Fix-ker.patch (text/x-patch, inline)]

From 28bdd162e5430517df3957b8454c49d037d684ba Mon Sep 17 00:00:00 2001
From: "Jan (janneke) Nieuwenhuizen" <janneke <at> gnu.org>
Date: Sat, 11 Jul 2020 22:44:39 +0200
Subject: [PATCH] commencement: glibc-final-with-bootstrap-bash: Fix
 kernel-headers.
Content-Transfer-Encoding: 8bit
Content-Type: text/plain; charset=UTF-8

* gnu/packages/commencement.scm (glibc-final-with-bootstrap-bash)
[propagated-inputs]: Use let-system to pass correct system
kernel-headers-boot0.
---
 gnu/packages/commencement.scm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/commencement.scm b/gnu/packages/commencement.scm
index d0393ebe25..518ffd0bd8 100644
--- a/gnu/packages/commencement.scm
+++ b/gnu/packages/commencement.scm
@@ -49,6 +49,7 @@
   #:use-module (gnu packages pkg-config)
   #:use-module (gnu packages rsync)
   #:use-module (gnu packages xml)
+  #:use-module (guix gexp)
   #:use-module (guix packages)
   #:use-module (guix download)
   #:use-module (guix build-system gnu)
@@ -3298,7 +3299,8 @@ memoized as a function of '%current-system'."
                                      "export CPATH\n"
                                      all "\n")))
                    #t)))))))
-    (propagated-inputs `(("kernel-headers" ,(kernel-headers-boot0))))
+    (propagated-inputs `(("kernel-headers" ,(let-system (system target)
+                                              (kernel-headers-boot0 system)))))
     (native-inputs
      `(("bison" ,bison-boot0)
        ("texinfo" ,texinfo-boot0)
-- 
Jan Nieuwenhuizen <janneke <at> gnu.org> | GNU LilyPond http://lilypond.org
Freelance IT http://JoyofSource.com | Avatar® http://AvatarAcademy.com

[Message part 9 (text/plain, inline)]

-- 
Jan Nieuwenhuizen <janneke <at> gnu.org> | GNU LilyPond http://lilypond.org
Freelance IT http://JoyofSource.com | Avatar® http://AvatarAcademy.com

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