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Subject: bug#20272: Support reproducible builds
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From: ludo@HIDDEN (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Date: Tue, 07 Apr 2015 13:48:16 +0200
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Currently .go files embed randomly-generated symbols stemming from
=E2=80=98syntax-session-id=E2=80=99, which prevents reproducible builds (see
<https://lists.gnu.org/archive/html/guix-devel/2013-09/msg00159.html>.)

One way to fix it would be to allow users to specify a random seed used
when generating session ids, and to make that available as a
command-line option to =E2=80=98guild compile=E2=80=99.  (GCC does somethin=
g similar
with its =E2=80=98-frandom-seed=E2=80=99 option.)

Probably, =E2=80=98syntax-session-id=E2=80=99 would have to be a SRFI-39 pa=
rameter and
we would need a =E2=80=98fresh-syntax-session-id=E2=80=99 procedure that wo=
uld take a
seed as a parameter.  In turn, =E2=80=98fresh_syntax_session_id=E2=80=99 wo=
uld need to
take that extra argument, and it would need to be changed to not read
directly from /dev/urandom.

WDYT?

Ludo=E2=80=99.

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To: ludo@HIDDEN (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Subject: bug#20272: Acknowledgement (Support reproducible builds)
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Subject: bug#20272: Support reproducible builds
Resent-From: Mark H Weaver <mhw@HIDDEN>
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Date: Wed, 03 Feb 2016 21:41:33 -0500
In-Reply-To: <87twws88hr.fsf@HIDDEN> ("Ludovic
 \=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\=
 \=\?utf-8\?Q\?s\?\= message of "Tue, 07 Apr 2015 13:48:16 +0200")
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ludo@HIDDEN (Ludovic Court=C3=A8s) writes:

> Currently .go files embed randomly-generated symbols stemming from
> =E2=80=98syntax-session-id=E2=80=99, which prevents reproducible builds (=
see
> <https://lists.gnu.org/archive/html/guix-devel/2013-09/msg00159.html>.)
>
> One way to fix it would be to allow users to specify a random seed used
> when generating session ids, and to make that available as a
> command-line option to =E2=80=98guild compile=E2=80=99.  (GCC does someth=
ing similar
> with its =E2=80=98-frandom-seed=E2=80=99 option.)

We could add this, but it is not analogous to the -frandom-seed option
where it is okay to give it the same value everywhere.  Users would need
to ensure that distinct session-ids are used for every invocation of
Guile.

More precisely, users of this feature would need to observe the
following restriction, or else unspecified behavior may result:

  If   A.go is generated by a Guile session with session-id A, and
       B.go is generated by a Guile session with session-id B, and
  they are both loaded into a Guile session with session-id C, then
  A, B, and C must all be distinct session-ids.

One more thing: even with a deterministic session-id, the multi-threaded
compiling of *.go files recently added to Guix will lead to
non-deterministic outputs.  I'm not sure how to make this work
deterministically with concurrency.  Even if we switched to a fixed
number of concurrent processes with one thread each, when process A
attempts to load a .go file that is produced by process B, it is not
deterministic whether it will be there.  If it is there, the macros in
that .go file will contain B's session-id, and if not, they will contain
A's session-id.

> Probably, =E2=80=98syntax-session-id=E2=80=99 would have to be a SRFI-39 =
parameter

This might adversely affect the efficiency of our macro expander on
platforms with slow thread local variables, and I'm not sure what it
would buy us.  If the idea is that it would allow us to build things in
multiple threads, I think that won't work anyway, for the reasons given
above.

I'm not entirely sure I've not made a mistake in my thinking, however.

     Regards,
       Mark

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Subject: bug#20272: Support reproducible builds
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From: ludo@HIDDEN (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
References: <87twws88hr.fsf@HIDDEN> <87d1sdqjs2.fsf@HIDDEN>
Date: Thu, 04 Feb 2016 10:35:48 +0100
In-Reply-To: <87d1sdqjs2.fsf@HIDDEN> (Mark H. Weaver's message of "Wed, 03
 Feb 2016 21:41:33 -0500")
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Mark H Weaver <mhw@HIDDEN> skribis:

> ludo@HIDDEN (Ludovic Court=C3=A8s) writes:
>
>> Currently .go files embed randomly-generated symbols stemming from
>> =E2=80=98syntax-session-id=E2=80=99, which prevents reproducible builds =
(see
>> <https://lists.gnu.org/archive/html/guix-devel/2013-09/msg00159.html>.)
>>
>> One way to fix it would be to allow users to specify a random seed used
>> when generating session ids, and to make that available as a
>> command-line option to =E2=80=98guild compile=E2=80=99.  (GCC does somet=
hing similar
>> with its =E2=80=98-frandom-seed=E2=80=99 option.)
>
> We could add this, but it is not analogous to the -frandom-seed option
> where it is okay to give it the same value everywhere.  Users would need
> to ensure that distinct session-ids are used for every invocation of
> Guile.

With GCC the common idiom is to use =E2=80=98-frandom-seed=3D$source_file=
=E2=80=99.

However, it would be best if =E2=80=98guild compile=E2=80=99 would choose t=
he seed
deterministically by default somehow, because we cannot expect all users
to add the new flag and use properly.

What about having =E2=80=98guild compile=E2=80=99 use the canonical file na=
me of the
source being compiled (or a hash thereof) as the seed?

> More precisely, users of this feature would need to observe the
> following restriction, or else unspecified behavior may result:
>
>   If   A.go is generated by a Guile session with session-id A, and
>        B.go is generated by a Guile session with session-id B, and
>   they are both loaded into a Guile session with session-id C, then
>   A, B, and C must all be distinct session-ids.

Right.

I wonder if we could detect collisions.  Ideally each .go could record
its session ID, but that=E2=80=99s probably not feasible in 2.0.

> One more thing: even with a deterministic session-id, the multi-threaded
> compiling of *.go files recently added to Guix will lead to
> non-deterministic outputs.  I'm not sure how to make this work
> deterministically with concurrency.  Even if we switched to a fixed
> number of concurrent processes with one thread each, when process A
> attempts to load a .go file that is produced by process B, it is not
> deterministic whether it will be there.  If it is there, the macros in
> that .go file will contain B's session-id, and if not, they will contain
> A's session-id.

Hmm, OK.  Well, let=E2=80=99s keep this use case aside for now.

>> Probably, =E2=80=98syntax-session-id=E2=80=99 would have to be a SRFI-39=
 parameter
>
> This might adversely affect the efficiency of our macro expander on
> platforms with slow thread local variables, and I'm not sure what it
> would buy us.  If the idea is that it would allow us to build things in
> multiple threads, I think that won't work anyway, for the reasons given
> above.

I was just thinking that it would be a convenient interface for (scripts
compile) to specify the session ID to use.

I think the first thing to do is to change =E2=80=98fresh_syntax_session_id=
=E2=80=99 so
that they can use a user-specified seed, when available, instead of
=E2=80=98scm_i_random_bytes_from_platform=E2=80=99.

WDYT?

Thanks for working on it!  :-)

Ludo=E2=80=99.

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ludo@HIDDEN (Ludovic Court=C3=A8s) writes:

> Currently .go files embed randomly-generated symbols stemming from
> =E2=80=98syntax-session-id=E2=80=99, which prevents reproducible builds (=
see
> <https://lists.gnu.org/archive/html/guix-devel/2013-09/msg00159.html>.)

I've given this more thought, and I think I have a way that avoids
session-ids altogether.

Currently, we include both the session-id and a global gensym counter in
the names of freshly generated marks and labels in psyntax.scm.
Instead, let them include the module name and a per-module counter.

More later...

    Mark

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--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

Mark H Weaver <mhw@HIDDEN> writes:

> ludo@HIDDEN (Ludovic Court=C3=A8s) writes:
>
>> Currently .go files embed randomly-generated symbols stemming from
>> =E2=80=98syntax-session-id=E2=80=99, which prevents reproducible builds =
(see
>> <https://lists.gnu.org/archive/html/guix-devel/2013-09/msg00159.html>.)
>
> I've given this more thought, and I think I have a way that avoids
> session-ids altogether.
>
> Currently, we include both the session-id and a global gensym counter in
> the names of freshly generated marks and labels in psyntax.scm.
> Instead, let them include the module name and a per-module counter.

I've attached a preliminary implementation of this idea, but I'm not yet
confident in its correctness.

      Mark



--=-=-=
Content-Type: text/x-patch
Content-Disposition: inline;
 filename=0001-PRELIMINARY-psyntax-Remove-uses-of-syntax-session-id.patch
Content-Description: [PATCH] PRELIMINARY: psyntax: Remove uses of
 syntax-session-id

From c5ce1d3ac0ccf76e0ceadf4980f2cd72379b31d8 Mon Sep 17 00:00:00 2001
From: Mark H Weaver <mhw@HIDDEN>
Date: Fri, 12 Feb 2016 11:19:38 -0500
Subject: [PATCH] PRELIMINARY: psyntax: Remove uses of syntax-session-id.

This is an attempted fix for <https://debbugs.gnu.org/20272>,
but I'm not yet confident in its correctness.

* module/ice-9/boot-9.scm (module-generate-unique-id!): New procedure.
  (module): Add 'next-unique-id' field.
  (the-root-module): Inherit 'next-unique-id' value from early stub.
  (make-module, make-autoload-interface): Adjust calls to
  module-constructor.
* module/ice-9/psyntax.scm (gen-label, new-mark): Generate unique
  identifiers from the module name and the per-module unique-id.
---
 module/ice-9/boot-9.scm     | 25 +++++++++++++++++++++----
 module/ice-9/psyntax-pp.scm | 15 +++++++++++++--
 module/ice-9/psyntax.scm    | 13 ++++++++++---
 3 files changed, 44 insertions(+), 9 deletions(-)

diff --git a/module/ice-9/boot-9.scm b/module/ice-9/boot-9.scm
index 872594b..1b1f185 100644
--- a/module/ice-9/boot-9.scm
+++ b/module/ice-9/boot-9.scm
@@ -1,6 +1,6 @@
 ;;; -*- mode: scheme; coding: utf-8; -*-
 
-;;;; Copyright (C) 1995-2014  Free Software Foundation, Inc.
+;;;; Copyright (C) 1995-2014, 2016  Free Software Foundation, Inc.
 ;;;;
 ;;;; This library is free software; you can redistribute it and/or
 ;;;; modify it under the terms of the GNU Lesser General Public
@@ -381,6 +381,12 @@ If there is no handler at all, Guile prints an error and then exits."
 (define (module-ref module sym)
   (let ((v (module-variable module sym)))
     (if v (variable-ref v) (error "badness!" (pk module) (pk sym)))))
+(define module-generate-unique-id!
+  (let ((next-id 0))
+    (lambda (m)
+      (let ((i next-id))
+        (set! next-id (+ i 1))
+        i))))
 (define (resolve-module . args)
   #f)
 
@@ -2018,7 +2024,8 @@ VALUE."
      submodules
      submodule-binder
      public-interface
-     filename)))
+     filename
+     next-unique-id)))
 
 
 ;; make-module &opt size uses binder
@@ -2046,7 +2053,7 @@ VALUE."
                       (make-hash-table %default-import-size)
                       '()
                       (make-weak-key-hash-table 31) #f
-                      (make-hash-table 7) #f #f #f))
+                      (make-hash-table 7) #f #f #f 0))
 
 
 
@@ -2653,6 +2660,11 @@ VALUE."
   (let ((m (make-module 0)))
     (set-module-obarray! m (%get-pre-modules-obarray))
     (set-module-name! m '(guile))
+
+    ;; Inherit next-unique-id from preliminary stub of
+    ;; %module-get-next-unique-id! defined above.
+    (set-module-next-unique-id! m (module-generate-unique-id! #f))
+
     m))
 
 ;; The root interface is a module that uses the same obarray as the
@@ -2681,6 +2693,11 @@ VALUE."
       the-root-module
       (error "unexpected module to resolve during module boot" name)))
 
+(define (module-generate-unique-id! m)
+  (let ((i (module-next-unique-id m)))
+    (set-module-next-unique-id! m (+ i 1))
+    i))
+
 ;; Cheat.  These bindings are needed by modules.c, but we don't want
 ;; to move their real definition here because that would be unnatural.
 ;;
@@ -3010,7 +3027,7 @@ VALUE."
               #:warning "Failed to autoload ~a in ~a:\n" sym name))))
     (module-constructor (make-hash-table 0) '() b #f #f name 'autoload #f
                         (make-hash-table 0) '() (make-weak-value-hash-table 31) #f
-                        (make-hash-table 0) #f #f #f)))
+                        (make-hash-table 0) #f #f #f 0)))
 
 (define (module-autoload! module . args)
   "Have @var{module} automatically load the module named @var{name} when one
diff --git a/module/ice-9/psyntax-pp.scm b/module/ice-9/psyntax-pp.scm
index 1ec5107..c81b69e 100644
--- a/module/ice-9/psyntax-pp.scm
+++ b/module/ice-9/psyntax-pp.scm
@@ -312,7 +312,12 @@
          (values x (car w)))))
    (gen-label
      (lambda ()
-       (string-append "l-" (session-id) (symbol->string (gensym "-")))))
+       (let ((mod (current-module)))
+         (simple-format
+           #f
+           "l-~s~s"
+           (module-generate-unique-id! mod)
+           (module-name mod)))))
    (gen-labels
      (lambda (ls)
        (if (null? ls) '() (cons (gen-label) (gen-labels (cdr ls))))))
@@ -960,7 +965,13 @@
            ((transformer-environment (lambda (k) (k e r w s rib mod))))
            (rebuild-macro-output
              (p (source-wrap e (anti-mark w) s mod))
-             (gensym (string-append "m-" (session-id) "-")))))))
+             (let ((mod (current-module)))
+               (string->symbol
+                 (simple-format
+                   #f
+                   "m-~s~s"
+                   (module-generate-unique-id! mod)
+                   (module-name mod)))))))))
    (expand-body
      (lambda (body outer-form r w mod)
        (let* ((r (cons '("placeholder" placeholder) r))
diff --git a/module/ice-9/psyntax.scm b/module/ice-9/psyntax.scm
index 79b353d..b9110f7 100644
--- a/module/ice-9/psyntax.scm
+++ b/module/ice-9/psyntax.scm
@@ -1,7 +1,7 @@
 ;;;; -*-scheme-*-
 ;;;;
 ;;;; Copyright (C) 2001, 2003, 2006, 2009, 2010, 2011,
-;;;;   2012, 2013 Free Software Foundation, Inc.
+;;;;   2012, 2013, 2016 Free Software Foundation, Inc.
 ;;;;
 ;;;; This library is free software; you can redistribute it and/or
 ;;;; modify it under the terms of the GNU Lesser General Public
@@ -642,7 +642,10 @@
     ;; labels must be comparable with "eq?", have read-write invariance,
     ;; and distinct from symbols.
     (define (gen-label)
-      (string-append "l-" (session-id) (symbol->string (gensym "-"))))
+      (let ((mod (current-module)))
+        (simple-format #f "l-~s~s"
+                       (module-generate-unique-id! mod)
+                       (module-name mod))))
 
     (define gen-labels
       (lambda (ls)
@@ -671,7 +674,11 @@
                    (cons 'shift (wrap-subst w)))))
 
     (define-syntax-rule (new-mark)
-      (gensym (string-append "m-" (session-id) "-")))
+      (let ((mod (current-module)))
+        (string->symbol
+         (simple-format #f "m-~s~s"
+                        (module-generate-unique-id! mod)
+                        (module-name mod)))))
 
     ;; make-empty-ribcage and extend-ribcage maintain list-based ribcages for
     ;; internal definitions, in which the ribcages are built incrementally
-- 
2.6.3


--=-=-=--

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On Thu 04 Feb 2016 03:41, Mark H Weaver <mhw@HIDDEN> writes:

>> Probably, =E2=80=98syntax-session-id=E2=80=99 would have to be a SRFI-39=
 parameter
>
> This might adversely affect the efficiency of our macro expander on
> platforms with slow thread local variables

I think you shouldn't worry about this.  The VM keeps a pointer to the
current thread, and accesses the dynamic state / dynamic stack from
there.  There are no pthread_getkey calls when accessing parameters in
the normal case.

Andy

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On Fri 12 Feb 2016 17:29, Mark H Weaver <mhw@HIDDEN> writes:

> Mark H Weaver <mhw@HIDDEN> writes:
>
>> ludo@HIDDEN (Ludovic Court=C3=A8s) writes:
>>
>>> Currently .go files embed randomly-generated symbols stemming from
>>> =E2=80=98syntax-session-id=E2=80=99, which prevents reproducible builds=
 (see
>>> <https://lists.gnu.org/archive/html/guix-devel/2013-09/msg00159.html>.)
>>
>> I've given this more thought, and I think I have a way that avoids
>> session-ids altogether.
>>
>> Currently, we include both the session-id and a global gensym counter in
>> the names of freshly generated marks and labels in psyntax.scm.
>> Instead, let them include the module name and a per-module counter.
>
> I've attached a preliminary implementation of this idea, but I'm not yet
> confident in its correctness.

Looks pretty good to me but I think we should put it off until after
2.0.12, just so we can get the release out the door.  WDYT?

Andy

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tag 20272 important,patch
thanks

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On Mon 20 Jun 2016 17:48, Andy Wingo <wingo@HIDDEN> writes:

>>> Currently, we include both the session-id and a global gensym counter in
>>> the names of freshly generated marks and labels in psyntax.scm.
>>> Instead, let them include the module name and a per-module counter.
>>
>> I've attached a preliminary implementation of this idea, but I'm not yet
>> confident in its correctness.
>
> Looks pretty good to me but I think we should put it off until after
> 2.0.12, just so we can get the release out the door.  WDYT?

On the other hand, maybe including it in 2.0.12 is the right thing;
dunno.  What do you think?

Andy

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severity 24659 important
severity 20272 important
thanks

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--=-=-=
Content-Type: text/plain

Hi!

[sent to guile-devel yesterday, probably should have gone here]

I have rebased Mark's patch to master and added a fix on top of that,
needed on 2.1 to pass make check.

Also, I found that to pass make check these patches depend on
(yesterday's) latest master commit

    Use atomics for async interrupts

that patch seems to depend on (at least git rebase-wise)

     Deprecate user asyncs
     Deprecate arbiters
     Fold 2.1.4 news into 2.2 news

Having these 6 patches on top op 2.1.4 has guile produce deterministic
.go files...mostly.

My client code is seems to be happy with this, however Guix tells me
that some files are still not deterministic:

    lib/guile/2.2/ccache/ice-9/peg/cache.go
    lib/guile/2.2/ccache/system/repl/coop-server.go
    lib/libguile-2.2.so.0.0.0

and in Guix's debug output (only after I removed this hoping to get
guile-next reproducible, guix informed me about the plain output
nondeterminism?)

    lib/guile/2.2/ccache/ice-9/peg/cache.go.debug
    lib/guile/2.2/ccache/web/server/http.go.debug

Any ideas on what's causing this remaining nondeterminism?

Greetings,
Jan.


--=-=-=
Content-Type: text/x-patch
Content-Disposition: inline;
 filename=0001-PRELIMINARY-psyntax-Remove-uses-of-syntax-session-id.patch

From a52fe09b584a99ff39997c47c5aa7f4c0ca428db Mon Sep 17 00:00:00 2001
From: Mark H Weaver <mhw@HIDDEN>
Date: Fri, 12 Feb 2016 11:19:38 -0500
Subject: [PATCH 1/2] PRELIMINARY: psyntax: Remove uses of syntax-session-id.

This is an attempted fix for <https://debbugs.gnu.org/20272>,
but I'm not yet confident in its correctness.

* module/ice-9/boot-9.scm (module-generate-unique-id!): New procedure.
  (module): Add 'next-unique-id' field.
  (the-root-module): Inherit 'next-unique-id' value from early stub.
  (make-module, make-autoload-interface): Adjust calls to
  module-constructor.
* module/ice-9/psyntax.scm (gen-label, new-mark): Generate unique
  identifiers from the module name and the per-module unique-id.
---
 module/ice-9/boot-9.scm     | 25 +++++++++++++++++++++----
 module/ice-9/psyntax-pp.scm | 15 +++++++++++++--
 module/ice-9/psyntax.scm    | 13 ++++++++++---
 3 files changed, 44 insertions(+), 9 deletions(-)

diff --git a/module/ice-9/boot-9.scm b/module/ice-9/boot-9.scm
index 7f62097..f1d684d 100644
--- a/module/ice-9/boot-9.scm
+++ b/module/ice-9/boot-9.scm
@@ -1,6 +1,6 @@
 ;;; -*- mode: scheme; coding: utf-8; -*-
 
-;;;; Copyright (C) 1995-2014  Free Software Foundation, Inc.
+;;;; Copyright (C) 1995-2014, 2016  Free Software Foundation, Inc.
 ;;;;
 ;;;; This library is free software; you can redistribute it and/or
 ;;;; modify it under the terms of the GNU Lesser General Public
@@ -374,6 +374,12 @@ a-cont
 (define (module-ref module sym)
   (let ((v (module-variable module sym)))
     (if v (variable-ref v) (error "badness!" (pk module) (pk sym)))))
+(define module-generate-unique-id!
+  (let ((next-id 0))
+    (lambda (m)
+      (let ((i next-id))
+        (set! next-id (+ i 1))
+        i))))
 (define (resolve-module . args)
   #f)
 
@@ -1973,7 +1979,8 @@ written into the port is returned."
      submodules
      submodule-binder
      public-interface
-     filename)))
+     filename
+     next-unique-id)))
 
 
 ;; make-module &opt size uses binder
@@ -1997,7 +2004,7 @@ written into the port is returned."
                       (make-hash-table)
                       '()
                       (make-weak-key-hash-table 31) #f
-                      (make-hash-table 7) #f #f #f))
+                      (make-hash-table 7) #f #f #f 0))
 
 
 
@@ -2579,6 +2586,11 @@ written into the port is returned."
   (let ((m (make-module 0)))
     (set-module-obarray! m (%get-pre-modules-obarray))
     (set-module-name! m '(guile))
+
+    ;; Inherit next-unique-id from preliminary stub of
+    ;; %module-get-next-unique-id! defined above.
+    (set-module-next-unique-id! m (module-generate-unique-id! #f))
+
     m))
 
 ;; The root interface is a module that uses the same obarray as the
@@ -2607,6 +2619,11 @@ written into the port is returned."
       the-root-module
       (error "unexpected module to resolve during module boot" name)))
 
+(define (module-generate-unique-id! m)
+  (let ((i (module-next-unique-id m)))
+    (set-module-next-unique-id! m (+ i 1))
+    i))
+
 ;; Cheat.  These bindings are needed by modules.c, but we don't want
 ;; to move their real definition here because that would be unnatural.
 ;;
@@ -2936,7 +2953,7 @@ written into the port is returned."
               #:warning "Failed to autoload ~a in ~a:\n" sym name))))
     (module-constructor (make-hash-table 0) '() b #f #f name 'autoload #f
                         (make-hash-table 0) '() (make-weak-value-hash-table 31) #f
-                        (make-hash-table 0) #f #f #f)))
+                        (make-hash-table 0) #f #f #f 0)))
 
 (define (module-autoload! module . args)
   "Have @var{module} automatically load the module named @var{name} when one
diff --git a/module/ice-9/psyntax-pp.scm b/module/ice-9/psyntax-pp.scm
index d797665..207d534 100644
--- a/module/ice-9/psyntax-pp.scm
+++ b/module/ice-9/psyntax-pp.scm
@@ -297,7 +297,12 @@
          (values x (car w)))))
    (gen-label
      (lambda ()
-       (string-append "l-" (session-id) (symbol->string (gensym "-")))))
+       (let ((mod (current-module)))
+         (simple-format
+           #f
+           "l-~s~s"
+           (module-generate-unique-id! mod)
+           (module-name mod)))))
    (gen-labels
      (lambda (ls)
        (if (null? ls) '() (cons (gen-label) (gen-labels (cdr ls))))))
@@ -1001,7 +1006,13 @@
              (lambda ()
                (rebuild-macro-output
                  (p (source-wrap e (anti-mark w) s mod))
-                 (gensym (string-append "m-" (session-id) "-")))))))))
+                 (let ((mod (current-module)))
+                   (string->symbol
+                     (simple-format
+                       #f
+                       "m-~s~s"
+                       (module-generate-unique-id! mod)
+                       (module-name mod)))))))))))
    (expand-body
      (lambda (body outer-form r w mod)
        (let* ((r (cons '("placeholder" placeholder) r))
diff --git a/module/ice-9/psyntax.scm b/module/ice-9/psyntax.scm
index 88df4c7..8fa0ff3 100644
--- a/module/ice-9/psyntax.scm
+++ b/module/ice-9/psyntax.scm
@@ -1,7 +1,7 @@
 ;;;; -*-scheme-*-
 ;;;;
 ;;;; Copyright (C) 2001, 2003, 2006, 2009, 2010, 2011,
-;;;;   2012, 2013, 2015 Free Software Foundation, Inc.
+;;;;   2012, 2013, 2015, 2016 Free Software Foundation, Inc.
 ;;;;
 ;;;; This library is free software; you can redistribute it and/or
 ;;;; modify it under the terms of the GNU Lesser General Public
@@ -632,7 +632,10 @@
     ;; labels must be comparable with "eq?", have read-write invariance,
     ;; and distinct from symbols.
     (define (gen-label)
-      (string-append "l-" (session-id) (symbol->string (gensym "-"))))
+      (let ((mod (current-module)))
+        (simple-format #f "l-~s~s"
+                       (module-generate-unique-id! mod)
+                       (module-name mod))))
 
     (define gen-labels
       (lambda (ls)
@@ -661,7 +664,11 @@
                    (cons 'shift (wrap-subst w)))))
 
     (define-syntax-rule (new-mark)
-      (gensym (string-append "m-" (session-id) "-")))
+      (let ((mod (current-module)))
+        (string->symbol
+         (simple-format #f "m-~s~s"
+                        (module-generate-unique-id! mod)
+                        (module-name mod)))))
 
     ;; make-empty-ribcage and extend-ribcage maintain list-based ribcages for
     ;; internal definitions, in which the ribcages are built incrementally
-- 
2.10.1


--=-=-=
Content-Type: text/x-patch
Content-Disposition: inline;
 filename=0002-psyntax-fix-gen-label-for-unset-module.patch

From ff6ddce535d5cc02a6574fe3baf238cf6533d218 Mon Sep 17 00:00:00 2001
From: Jan Nieuwenhuizen <janneke@HIDDEN>
Date: Tue, 1 Nov 2016 15:10:01 +0100
Subject: [PATCH 2/2] psyntax: fix gen-label for unset module.

* module/ice-9/boot-9.scm (generate-unique-id!): New function.
  (module-generate-unique-id!): Use it.
* module/ice-9/psyntax.scm (gen-label): Use it to cater for unset
  module.
* module/ice-9/psyntax-pp.scm: Regenerate.
---
 module/ice-9/boot-9.scm     | 3 ++-
 module/ice-9/psyntax-pp.scm | 2 +-
 module/ice-9/psyntax.scm    | 6 ++++--
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/module/ice-9/boot-9.scm b/module/ice-9/boot-9.scm
index f1d684d..e18818e 100644
--- a/module/ice-9/boot-9.scm
+++ b/module/ice-9/boot-9.scm
@@ -374,12 +374,13 @@ a-cont
 (define (module-ref module sym)
   (let ((v (module-variable module sym)))
     (if v (variable-ref v) (error "badness!" (pk module) (pk sym)))))
-(define module-generate-unique-id!
+(define generate-unique-id!
   (let ((next-id 0))
     (lambda (m)
       (let ((i next-id))
         (set! next-id (+ i 1))
         i))))
+(define module-generate-unique-id! generate-unique-id!)
 (define (resolve-module . args)
   #f)
 
diff --git a/module/ice-9/psyntax-pp.scm b/module/ice-9/psyntax-pp.scm
index 207d534..c47df7f 100644
--- a/module/ice-9/psyntax-pp.scm
+++ b/module/ice-9/psyntax-pp.scm
@@ -301,7 +301,7 @@
          (simple-format
            #f
            "l-~s~s"
-           (module-generate-unique-id! mod)
+           (if mod (module-generate-unique-id! mod) (generate-unique-id! #f))
            (module-name mod)))))
    (gen-labels
      (lambda (ls)
diff --git a/module/ice-9/psyntax.scm b/module/ice-9/psyntax.scm
index 8fa0ff3..7e5c863 100644
--- a/module/ice-9/psyntax.scm
+++ b/module/ice-9/psyntax.scm
@@ -634,8 +634,10 @@
     (define (gen-label)
       (let ((mod (current-module)))
         (simple-format #f "l-~s~s"
-                       (module-generate-unique-id! mod)
-                       (module-name mod))))
+                        (if mod
+                            (module-generate-unique-id! mod)
+                            (generate-unique-id! #f))
+                        (module-name mod))))
 
     (define gen-labels
       (lambda (ls)
-- 
2.10.1


--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable



--=20
Jan Nieuwenhuizen <janneke@HIDDEN> | GNU LilyPond http://lilypond.org
Freelance IT http://JoyofSource.com | Avatar=C2=AE  http://AvatarAcademy.nl=
=20=20

--=-=-=--

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--=-=-=
Content-Type: text/plain

Jan Nieuwenhuizen writes:

I have been building quite some versions of Guile the past week.  There
re a couple of .go files that keep giving me problems wrt
nondeterminism:

    web/server/http.go

(define *timer* (gettimeofday)) seemed suspect, but seems harmless.

    rnrs/arithmetic/fixnums.go

make-implementation-restriction-violation seemed suspect, but commenting
it out does not seem to help.

After commenting out all of http.scm and fixnums.scm, yesterday I had 3
Guix builds on two machines (GuixSD and one Ubuntu+Guix) that were
bit-identical, but one build showed differences in

    system/repl/commands.go

Apparently most of the time this file builds deterministicly, but some
times it does not!?  Ideas?

In the mean time, one more obviously correct and trivial patch attatched
that removes a build time stamp.

Greetings,
Jan


--=-=-=
Content-Type: text/x-patch
Content-Disposition: inline;
 filename=0001-Reproducible-build-Set-buildstamp-to-EPOCH.patch

From 2050673bffaa0ba18fabb8e92c3bc388f40bcea5 Mon Sep 17 00:00:00 2001
From: Jan Nieuwenhuizen <janneke@HIDDEN>
Date: Fri, 4 Nov 2016 16:12:55 +0100
Subject: [PATCH] Reproducible build: Set buildstamp to EPOCH.

* libguile/Makefile.am (libpath.h): Set buildstamp to EPOCH.
---
 libguile/Makefile.am | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libguile/Makefile.am b/libguile/Makefile.am
index 31cff75..4471d16 100644
--- a/libguile/Makefile.am
+++ b/libguile/Makefile.am
@@ -743,7 +743,7 @@ libpath.h: $(srcdir)/Makefile.in  $(top_builddir)/config.status
 		>> libpath.tmp
 	@echo '	{ "LIBS",	   "@GUILE_LIBS@" }, \' >> libpath.tmp
 	@echo '	{ "CFLAGS",	   "@GUILE_CFLAGS@" }, \' >> libpath.tmp
-	@echo '	{ "buildstamp",    "'`date -u +'%Y-%m-%d %T'`'" }, \' >> libpath.tmp
+	@echo '	{ "buildstamp",    "'`date -u -d@0`'" }, \' >> libpath.tmp
 	@echo '}' >> libpath.tmp
 	$(AM_V_GEN)mv libpath.tmp libpath.h
 
-- 
2.10.1


--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable


--=20
Jan Nieuwenhuizen <janneke@HIDDEN> | GNU LilyPond http://lilypond.org
Freelance IT http://JoyofSource.com | Avatar=C2=AE  http://AvatarAcademy.nl=
=20=20

--=-=-=--

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Hello Jan!

Jan Nieuwenhuizen <janneke@HIDDEN> skribis:

> I have been building quite some versions of Guile the past week.  There
> re a couple of .go files that keep giving me problems wrt
> nondeterminism:
>
>     web/server/http.go
>
> (define *timer* (gettimeofday)) seemed suspect, but seems harmless.
>
>     rnrs/arithmetic/fixnums.go
>
> make-implementation-restriction-violation seemed suspect, but commenting
> it out does not seem to help.
>
> After commenting out all of http.scm and fixnums.scm, yesterday I had 3
> Guix builds on two machines (GuixSD and one Ubuntu+Guix) that were
> bit-identical, but one build showed differences in
>
>     system/repl/commands.go
>
> Apparently most of the time this file builds deterministicly, but some
> times it does not!?  Ideas?

Did you look at these differences with diffoscope?  That would be
useful.

> In the mean time, one more obviously correct and trivial patch attatched
> that removes a build time stamp.

I=E2=80=99ve committed something similar but that honors =E2=80=98SOURCE_DA=
TE_EPOCH=E2=80=99.
So by default there=E2=80=99s no difference compared to the previous behavi=
or,
but if =E2=80=98SOURCE_DATE_EPOCH=E2=80=99 is given, then it is used as the=
 build date.

Thanks!

Ludo=E2=80=99.

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ludo@HIDDEN (Ludovic Court=C3=A8s) skribis:

> Jan Nieuwenhuizen <janneke@HIDDEN> skribis:
>
>> I have been building quite some versions of Guile the past week.  There
>> re a couple of .go files that keep giving me problems wrt
>> nondeterminism:
>>
>>     web/server/http.go
>>
>> (define *timer* (gettimeofday)) seemed suspect, but seems harmless.
>>
>>     rnrs/arithmetic/fixnums.go
>>
>> make-implementation-restriction-violation seemed suspect, but commenting
>> it out does not seem to help.
>>
>> After commenting out all of http.scm and fixnums.scm, yesterday I had 3
>> Guix builds on two machines (GuixSD and one Ubuntu+Guix) that were
>> bit-identical, but one build showed differences in
>>
>>     system/repl/commands.go
>>
>> Apparently most of the time this file builds deterministicly, but some
>> times it does not!?  Ideas?
>
> Did you look at these differences with diffoscope?  That would be
> useful.

I built it with =E2=80=98guix build --rounds=3D2 -K=E2=80=99 and got 17 dif=
fering .go
files.  I looked at srfi/srfi-9/gnu.go with ediff + hexl-mode in Emacs
and found a dozen of =E2=80=9Ct-XYZ=E2=80=9D and =E2=80=9Ctmp-XYZ=E2=80=9D =
identifiers with a different
value for XYZ (an integer).

To be continued=E2=80=A6

Ludo=E2=80=99.

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ludo@HIDDEN (Ludovic Court=C3=A8s) skribis:

> ludo@HIDDEN (Ludovic Court=C3=A8s) skribis:
>
>> Jan Nieuwenhuizen <janneke@HIDDEN> skribis:
>>
>>> I have been building quite some versions of Guile the past week.  There
>>> re a couple of .go files that keep giving me problems wrt
>>> nondeterminism:
>>>
>>>     web/server/http.go
>>>
>>> (define *timer* (gettimeofday)) seemed suspect, but seems harmless.
>>>
>>>     rnrs/arithmetic/fixnums.go
>>>
>>> make-implementation-restriction-violation seemed suspect, but commenting
>>> it out does not seem to help.
>>>
>>> After commenting out all of http.scm and fixnums.scm, yesterday I had 3
>>> Guix builds on two machines (GuixSD and one Ubuntu+Guix) that were
>>> bit-identical, but one build showed differences in
>>>
>>>     system/repl/commands.go
>>>
>>> Apparently most of the time this file builds deterministicly, but some
>>> times it does not!?  Ideas?
>>
>> Did you look at these differences with diffoscope?  That would be
>> useful.
>
> I built it with =E2=80=98guix build --rounds=3D2 -K=E2=80=99 and got 17 d=
iffering .go
> files.  I looked at srfi/srfi-9/gnu.go with ediff + hexl-mode in Emacs
> and found a dozen of =E2=80=9Ct-XYZ=E2=80=9D and =E2=80=9Ctmp-XYZ=E2=80=
=9D identifiers with a different
> value for XYZ (an integer).

To demonstrate non-reproducibility (with the attached patch, which is a
rebased version of Mark=E2=80=99s), just build the same module twice: once =
with
its dependency evaluated, and then with its dependency compiled.  The
results differ:

--8<---------------cut here---------------start------------->8---
ludo@pluto ~/src/guile$ rm -f module/srfi/srfi-9/gnu.go module/srfi/srfi-9.=
go
ludo@pluto ~/src/guile$ make -C module srfi/srfi-9/gnu.go
make: Entering directory '/home/ludo/src/guile/module'
  GUILEC srfi/srfi-9/gnu.go
wrote `srfi/srfi-9/gnu.go'
make: Leaving directory '/home/ludo/src/guile/module'
ludo@pluto ~/src/guile$ mv module/srfi/srfi-9/gnu.go{,.v1}
ludo@pluto ~/src/guile$ make -C module srfi/srfi-9.go
make: Entering directory '/home/ludo/src/guile/module'
  GUILEC srfi/srfi-9.go
wrote `srfi/srfi-9.go'
make: Leaving directory '/home/ludo/src/guile/module'
ludo@pluto ~/src/guile$ make -C module srfi/srfi-9/gnu.go
make: Entering directory '/home/ludo/src/guile/module'
  GUILEC srfi/srfi-9/gnu.go
wrote `srfi/srfi-9/gnu.go'
make: Leaving directory '/home/ludo/src/guile/module'
ludo@pluto ~/src/guile$ mv module/srfi/srfi-9/gnu.go{,.v2}
ludo@pluto ~/src/guile$ diff -u module/srfi/srfi-9/gnu.go.{v1,v2}
Ciferecaj dosieroj module/srfi/srfi-9/gnu.go.v1 kaj module/srfi/srfi-9/gnu.=
go.v2 estas malsamaj
--8<---------------cut here---------------end--------------->8---

In gnu.go.v2 the integers appended to generated symbols are lower
because fewer symbols had to be generated.

Ludo=E2=80=99.


--=-=-=
Content-Type: text/x-patch; charset=utf-8
Content-Disposition: inline;
 filename=0001-psyntax-Remove-uses-of-syntax-session-id.patch
Content-Transfer-Encoding: quoted-printable
Content-Description: the patch

From 4301d4b53d7243012bbf6ee4d7558910dd712330 Mon Sep 17 00:00:00 2001
From: Mark H Weaver <mhw@HIDDEN>
Date: Fri, 12 Feb 2016 11:19:38 -0500
Subject: [PATCH] psyntax: Remove uses of syntax-session-id.
MIME-Version: 1.0
Content-Type: text/plain; charset=3DUTF-8
Content-Transfer-Encoding: 8bit

This is an attempted fix for <https://debbugs.gnu.org/20272>,
but I'm not yet confident in its correctness.

* module/ice-9/boot-9.scm (module-generate-unique-id!): New procedure.
  (module): Add 'next-unique-id' field.
  (the-root-module): Inherit 'next-unique-id' value from early stub.
  (make-module, make-autoload-interface): Adjust calls to
  module-constructor.
* module/ice-9/psyntax.scm (gen-label, new-mark): Generate unique
  identifiers from the module name and the per-module unique-id.
* module/ice-9/psyntax-pp.scm: Regenerate.

Signed-off-by: Ludovic Court=C3=A8s <ludo@HIDDEN>
---
 module/ice-9/boot-9.scm     | 25 +++++++++++++++++++++----
 module/ice-9/psyntax-pp.scm | 15 +++++++++++++--
 module/ice-9/psyntax.scm    | 11 +++++++++--
 3 files changed, 43 insertions(+), 8 deletions(-)

diff --git a/module/ice-9/boot-9.scm b/module/ice-9/boot-9.scm
index 426d831..8ef7e5f 100644
--- a/module/ice-9/boot-9.scm
+++ b/module/ice-9/boot-9.scm
@@ -1,6 +1,6 @@
 ;;; -*- mode: scheme; coding: utf-8; -*-
=20
-;;;; Copyright (C) 1995-2014  Free Software Foundation, Inc.
+;;;; Copyright (C) 1995-2014, 2016  Free Software Foundation, Inc.
 ;;;;
 ;;;; This library is free software; you can redistribute it and/or
 ;;;; modify it under the terms of the GNU Lesser General Public
@@ -384,6 +384,12 @@ If there is no handler at all, Guile prints an error a=
nd then exits."
 (define (module-ref module sym)
   (let ((v (module-variable module sym)))
     (if v (variable-ref v) (error "badness!" (pk module) (pk sym)))))
+(define module-generate-unique-id!
+  (let ((next-id 0))
+    (lambda (m)
+      (let ((i next-id))
+        (set! next-id (+ i 1))
+        i))))
 (define (resolve-module . args)
   #f)
=20
@@ -2021,7 +2027,8 @@ VALUE."
      submodules
      submodule-binder
      public-interface
-     filename)))
+     filename
+     next-unique-id)))
=20
=20
 ;; make-module &opt size uses binder
@@ -2049,7 +2056,7 @@ VALUE."
                       (make-hash-table %default-import-size)
                       '()
                       (make-weak-key-hash-table 31) #f
-                      (make-hash-table 7) #f #f #f))
+                      (make-hash-table 7) #f #f #f 0))
=20
=20
 
@@ -2656,6 +2663,11 @@ VALUE."
   (let ((m (make-module 0)))
     (set-module-obarray! m (%get-pre-modules-obarray))
     (set-module-name! m '(guile))
+
+    ;; Inherit next-unique-id from preliminary stub of
+    ;; %module-get-next-unique-id! defined above.
+    (set-module-next-unique-id! m (module-generate-unique-id! #f))
+
     m))
=20
 ;; The root interface is a module that uses the same obarray as the
@@ -2684,6 +2696,11 @@ VALUE."
       the-root-module
       (error "unexpected module to resolve during module boot" name)))
=20
+(define (module-generate-unique-id! m)
+  (let ((i (module-next-unique-id m)))
+    (set-module-next-unique-id! m (+ i 1))
+    i))
+
 ;; Cheat.  These bindings are needed by modules.c, but we don't want
 ;; to move their real definition here because that would be unnatural.
 ;;
@@ -3013,7 +3030,7 @@ VALUE."
               #:warning "Failed to autoload ~a in ~a:\n" sym name))))
     (module-constructor (make-hash-table 0) '() b #f #f name 'autoload #f
                         (make-hash-table 0) '() (make-weak-value-hash-tabl=
e 31) #f
-                        (make-hash-table 0) #f #f #f)))
+                        (make-hash-table 0) #f #f #f 0)))
=20
 (define (module-autoload! module . args)
   "Have @var{module} automatically load the module named @var{name} when o=
ne
diff --git a/module/ice-9/psyntax-pp.scm b/module/ice-9/psyntax-pp.scm
index 1ec5107..c81b69e 100644
--- a/module/ice-9/psyntax-pp.scm
+++ b/module/ice-9/psyntax-pp.scm
@@ -312,7 +312,12 @@
          (values x (car w)))))
    (gen-label
      (lambda ()
-       (string-append "l-" (session-id) (symbol->string (gensym "-")))))
+       (let ((mod (current-module)))
+         (simple-format
+           #f
+           "l-~s~s"
+           (module-generate-unique-id! mod)
+           (module-name mod)))))
    (gen-labels
      (lambda (ls)
        (if (null? ls) '() (cons (gen-label) (gen-labels (cdr ls))))))
@@ -960,7 +965,13 @@
            ((transformer-environment (lambda (k) (k e r w s rib mod))))
            (rebuild-macro-output
              (p (source-wrap e (anti-mark w) s mod))
-             (gensym (string-append "m-" (session-id) "-")))))))
+             (let ((mod (current-module)))
+               (string->symbol
+                 (simple-format
+                   #f
+                   "m-~s~s"
+                   (module-generate-unique-id! mod)
+                   (module-name mod)))))))))
    (expand-body
      (lambda (body outer-form r w mod)
        (let* ((r (cons '("placeholder" placeholder) r))
diff --git a/module/ice-9/psyntax.scm b/module/ice-9/psyntax.scm
index 79b353d..7d12469 100644
--- a/module/ice-9/psyntax.scm
+++ b/module/ice-9/psyntax.scm
@@ -642,7 +642,10 @@
     ;; labels must be comparable with "eq?", have read-write invariance,
     ;; and distinct from symbols.
     (define (gen-label)
-      (string-append "l-" (session-id) (symbol->string (gensym "-"))))
+      (let ((mod (current-module)))
+        (simple-format #f "l-~s~s"
+                       (module-generate-unique-id! mod)
+                       (module-name mod))))
=20
     (define gen-labels
       (lambda (ls)
@@ -671,7 +674,11 @@
                    (cons 'shift (wrap-subst w)))))
=20
     (define-syntax-rule (new-mark)
-      (gensym (string-append "m-" (session-id) "-")))
+      (let ((mod (current-module)))
+        (string->symbol
+         (simple-format #f "m-~s~s"
+                        (module-generate-unique-id! mod)
+                        (module-name mod)))))
=20
     ;; make-empty-ribcage and extend-ribcage maintain list-based ribcages =
for
     ;; internal definitions, in which the ribcages are built incrementally
--=20
2.10.2


--=-=-=--

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--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

ludo@HIDDEN (Ludovic Court=C3=A8s) skribis:

> To demonstrate non-reproducibility (with the attached patch, which is a
> rebased version of Mark=E2=80=99s), just build the same module twice: onc=
e with
> its dependency evaluated, and then with its dependency compiled.  The
> results differ:

[...]

> In gnu.go.v2 the integers appended to generated symbols are lower
> because fewer symbols had to be generated.

This is fixed by introducing a =E2=80=9Cper-module gensym=E2=80=9D (patch a=
ttached; to
be applied on top of the previous one).  That way, the sequence number
in generated identifiers only depends on the module being compiled, not
on whether other modules are being interpreted or not.

The =E2=80=98module-gensym=E2=80=99 procedure I added adds a hash of the mo=
dule name in
the identifier, to distinguish from symbols introduced by =E2=80=98gensym=
=E2=80=99.
This makes symbols 3=E2=80=934 characters longer; perhaps we could avoid it.

Thoughts?

Thanks,
Ludo=E2=80=99.


--=-=-=
Content-Type: text/x-patch
Content-Disposition: inline

diff --git a/module/ice-9/boot-9.scm b/module/ice-9/boot-9.scm
index 8ef7e5f..5d0e727 100644
--- a/module/ice-9/boot-9.scm
+++ b/module/ice-9/boot-9.scm
@@ -390,6 +390,7 @@ If there is no handler at all, Guile prints an error and then exits."
       (let ((i next-id))
         (set! next-id (+ i 1))
         i))))
+(define module-gensym gensym)
 (define (resolve-module . args)
   #f)
 
@@ -2731,6 +2732,20 @@ VALUE."
             (nested-define-module! (resolve-module '() #f) name mod)
             (accessor mod))))))
 
+(define* (module-gensym #:optional (id " mg") (m (current-module)))
+  "Return a fresh symbol in the context of module M, based on ID (a
+string or symbol).  As long as M is a valid module, this procedure is
+deterministic."
+  (define (->string number)
+    (number->string number 16))
+
+  (if m
+      (string->symbol
+       (string-append id "-"
+                      (->string (hash (module-name m) 10000)) "-"
+                      (->string (module-generate-unique-id! m))))
+      (gensym id)))
+
 (define (make-modules-in module name)
   (or (nested-ref-module module name)
       (let ((m (make-module 31)))
@@ -4322,7 +4337,6 @@ when none is available, reading FILE-NAME with READER."
                      syntax-locally-bound-identifiers
                      syntax-session-id)))
 
-
 
 
 ;;; Place the user in the guile-user module.
diff --git a/module/ice-9/psyntax-pp.scm b/module/ice-9/psyntax-pp.scm
index c81b69e..e46951d 100644
--- a/module/ice-9/psyntax-pp.scm
+++ b/module/ice-9/psyntax-pp.scm
@@ -1483,7 +1483,8 @@
                                         s
                                         mod
                                         get-formals
-                                        (map (lambda (tmp-2 tmp-1 tmp) (cons tmp (cons tmp-1 tmp-2)))
+                                        (map (lambda (tmp-c0a-a89 tmp-c0a-a88 tmp-c0a-a87)
+                                               (cons tmp-c0a-a87 (cons tmp-c0a-a88 tmp-c0a-a89)))
                                              e2*
                                              e1*
                                              args*)))
@@ -1515,7 +1516,7 @@
    (gen-var
      (lambda (id)
        (let ((id (if (syntax-object? id) (syntax-object-expression id) id)))
-         (gensym (string-append (symbol->string id) "-")))))
+         (module-gensym (symbol->string id)))))
    (lambda-var-list
      (lambda (vars)
        (let lvl ((vars vars) (ls '()) (w '(())))
@@ -1777,7 +1778,8 @@
             (apply (lambda (args e1 e2)
                      (build-it
                        '()
-                       (map (lambda (tmp-2 tmp-1 tmp) (cons tmp (cons tmp-1 tmp-2)))
+                       (map (lambda (tmp-c0a-c54 tmp-c0a-c53 tmp-c0a-c52)
+                              (cons tmp-c0a-c52 (cons tmp-c0a-c53 tmp-c0a-c54)))
                             e2
                             e1
                             args)))
@@ -1789,7 +1791,8 @@
                 (apply (lambda (docstring args e1 e2)
                          (build-it
                            (list (cons 'documentation (syntax->datum docstring)))
-                           (map (lambda (tmp-2 tmp-1 tmp) (cons tmp (cons tmp-1 tmp-2)))
+                           (map (lambda (tmp-c0a-c6a tmp-c0a-c69 tmp-c0a-c68)
+                                  (cons tmp-c0a-c68 (cons tmp-c0a-c69 tmp-c0a-c6a)))
                                 e2
                                 e1
                                 args)))
@@ -1812,7 +1815,8 @@
             (apply (lambda (args e1 e2)
                      (build-it
                        '()
-                       (map (lambda (tmp-2 tmp-1 tmp) (cons tmp (cons tmp-1 tmp-2)))
+                       (map (lambda (tmp-c0a-c8a tmp-c0a-c89 tmp-c0a-c88)
+                              (cons tmp-c0a-c88 (cons tmp-c0a-c89 tmp-c0a-c8a)))
                             e2
                             e1
                             args)))
@@ -1824,7 +1828,8 @@
                 (apply (lambda (docstring args e1 e2)
                          (build-it
                            (list (cons 'documentation (syntax->datum docstring)))
-                           (map (lambda (tmp-2 tmp-1 tmp) (cons tmp (cons tmp-1 tmp-2)))
+                           (map (lambda (tmp-c0a-ca0 tmp-c0a-c9f tmp-c0a-c9e)
+                                  (cons tmp-c0a-c9e (cons tmp-c0a-c9f tmp-c0a-ca0)))
                                 e2
                                 e1
                                 args)))
@@ -2340,7 +2345,7 @@
         (if (not (list? x))
           (syntax-violation 'generate-temporaries "invalid argument" x)))
       (let ((mod (cons 'hygiene (module-name (current-module)))))
-        (map (lambda (x) (wrap (gensym "t-") '((top)) mod)) ls))))
+        (map (lambda (x) (wrap (module-gensym "t-") '((top)) mod)) ls))))
   (set! free-identifier=?
     (lambda (x y)
       (let ((x x))
@@ -2710,7 +2715,8 @@
                          #f
                          k
                          '()
-                         (map (lambda (tmp-2 tmp-1 tmp) (list (cons tmp tmp-1) tmp-2))
+                         (map (lambda (tmp-c0a-1 tmp-c0a tmp-c0a-10ff)
+                                (list (cons tmp-c0a-10ff tmp-c0a) tmp-c0a-1))
                               template
                               pattern
                               keyword)))
@@ -2726,7 +2732,8 @@
                              #f
                              k
                              (list docstring)
-                             (map (lambda (tmp-2 tmp-1 tmp) (list (cons tmp tmp-1) tmp-2))
+                             (map (lambda (tmp-c0a-111a tmp-c0a-1 tmp-c0a)
+                                    (list (cons tmp-c0a tmp-c0a-1) tmp-c0a-111a))
                                   template
                                   pattern
                                   keyword)))
@@ -2741,7 +2748,8 @@
                                  dots
                                  k
                                  '()
-                                 (map (lambda (tmp-2 tmp-1 tmp) (list (cons tmp tmp-1) tmp-2))
+                                 (map (lambda (tmp-c0a-2 tmp-c0a-1 tmp-c0a)
+                                        (list (cons tmp-c0a tmp-c0a-1) tmp-c0a-2))
                                       template
                                       pattern
                                       keyword)))
@@ -2757,7 +2765,8 @@
                                      dots
                                      k
                                      (list docstring)
-                                     (map (lambda (tmp-2 tmp-1 tmp) (list (cons tmp tmp-1) tmp-2))
+                                     (map (lambda (tmp-c0a-2 tmp-c0a-1 tmp-c0a)
+                                            (list (cons tmp-c0a tmp-c0a-1) tmp-c0a-2))
                                           template
                                           pattern
                                           keyword)))
@@ -2876,7 +2885,7 @@
                                              (apply (lambda (p)
                                                       (if (= lev 0)
                                                         (quasilist*
-                                                          (map (lambda (tmp) (list "value" tmp)) p)
+                                                          (map (lambda (tmp-c0a-11b7) (list "value" tmp-c0a-11b7)) p)
                                                           (quasi q lev))
                                                         (quasicons
                                                           (quasicons
@@ -2894,7 +2903,8 @@
                                                  (apply (lambda (p)
                                                           (if (= lev 0)
                                                             (quasiappend
-                                                              (map (lambda (tmp) (list "value" tmp)) p)
+                                                              (map (lambda (tmp-c0a-11bc) (list "value" tmp-c0a-11bc))
+                                                                   p)
                                                               (quasi q lev))
                                                             (quasicons
                                                               (quasicons
@@ -2927,7 +2937,9 @@
                               (if tmp
                                 (apply (lambda (p)
                                          (if (= lev 0)
-                                           (quasilist* (map (lambda (tmp) (list "value" tmp)) p) (vquasi q lev))
+                                           (quasilist*
+                                             (map (lambda (tmp-c0a-11d2) (list "value" tmp-c0a-11d2)) p)
+                                             (vquasi q lev))
                                            (quasicons
                                              (quasicons
                                                '("quote" #(syntax-object unquote ((top)) (hygiene guile)))
@@ -2943,7 +2955,7 @@
                                     (apply (lambda (p)
                                              (if (= lev 0)
                                                (quasiappend
-                                                 (map (lambda (tmp) (list "value" tmp)) p)
+                                                 (map (lambda (tmp-c0a-11d7) (list "value" tmp-c0a-11d7)) p)
                                                  (vquasi q lev))
                                                (quasicons
                                                  (quasicons
@@ -3031,7 +3043,7 @@
                               (let ((tmp-1 ls))
                                 (let ((tmp ($sc-dispatch tmp-1 'each-any)))
                                   (if tmp
-                                    (apply (lambda (t) (cons "vector" t)) tmp)
+                                    (apply (lambda (t--c0a) (cons "vector" t--c0a)) tmp)
                                     (syntax-violation
                                       #f
                                       "source expression failed to match any pattern"
@@ -3039,7 +3051,8 @@
                    (let ((tmp y))
                      (let ((tmp-1 ($sc-dispatch tmp '(#(atom "quote") each-any))))
                        (if tmp-1
-                         (apply (lambda (y) (k (map (lambda (tmp) (list "quote" tmp)) y)))
+                         (apply (lambda (y)
+                                  (k (map (lambda (tmp-c0a-122c) (list "quote" tmp-c0a-122c)) y)))
                                 tmp-1)
                          (let ((tmp-1 ($sc-dispatch tmp '(#(atom "list") . each-any))))
                            (if tmp-1
@@ -3048,7 +3061,8 @@
                                (if tmp-1
                                  (apply (lambda (y z) (f z (lambda (ls) (k (append y ls))))) tmp-1)
                                  (let ((else tmp))
-                                   (let ((tmp x)) (let ((t tmp)) (list "list->vector" t)))))))))))))))))
+                                   (let ((tmp x))
+                                     (let ((t--c0a-123b tmp)) (list "list->vector" t--c0a-123b)))))))))))))))))
        (emit (lambda (x)
                (let ((tmp x))
                  (let ((tmp-1 ($sc-dispatch tmp '(#(atom "quote") any))))
@@ -3061,7 +3075,8 @@
                                   (let ((tmp-1 (map emit x)))
                                     (let ((tmp ($sc-dispatch tmp-1 'each-any)))
                                       (if tmp
-                                        (apply (lambda (t) (cons '#(syntax-object list ((top)) (hygiene guile)) t))
+                                        (apply (lambda (t--c0a-124a)
+                                                 (cons '#(syntax-object list ((top)) (hygiene guile)) t--c0a-124a))
                                                tmp)
                                         (syntax-violation
                                           #f
@@ -3077,8 +3092,10 @@
                                           (let ((tmp-1 (list (emit (car x*)) (f (cdr x*)))))
                                             (let ((tmp ($sc-dispatch tmp-1 '(any any))))
                                               (if tmp
-                                                (apply (lambda (t-1 t)
-                                                         (list '#(syntax-object cons ((top)) (hygiene guile)) t-1 t))
+                                                (apply (lambda (t--c0a-125e t--c0a-125d)
+                                                         (list '#(syntax-object cons ((top)) (hygiene guile))
+                                                               t--c0a-125e
+                                                               t--c0a-125d))
                                                        tmp)
                                                 (syntax-violation
                                                   #f
@@ -3091,8 +3108,9 @@
                                           (let ((tmp-1 (map emit x)))
                                             (let ((tmp ($sc-dispatch tmp-1 'each-any)))
                                               (if tmp
-                                                (apply (lambda (t)
-                                                         (cons '#(syntax-object append ((top)) (hygiene guile)) t))
+                                                (apply (lambda (t--c0a-126a)
+                                                         (cons '#(syntax-object append ((top)) (hygiene guile))
+                                                               t--c0a-126a))
                                                        tmp)
                                                 (syntax-violation
                                                   #f
@@ -3105,8 +3123,9 @@
                                               (let ((tmp-1 (map emit x)))
                                                 (let ((tmp ($sc-dispatch tmp-1 'each-any)))
                                                   (if tmp
-                                                    (apply (lambda (t)
-                                                             (cons '#(syntax-object vector ((top)) (hygiene guile)) t))
+                                                    (apply (lambda (t--c0a)
+                                                             (cons '#(syntax-object vector ((top)) (hygiene guile))
+                                                                   t--c0a))
                                                            tmp)
                                                     (syntax-violation
                                                       #f
@@ -3117,8 +3136,9 @@
                                        (if tmp-1
                                          (apply (lambda (x)
                                                   (let ((tmp (emit x)))
-                                                    (let ((t tmp))
-                                                      (list '#(syntax-object list->vector ((top)) (hygiene guile)) t))))
+                                                    (let ((t--c0a tmp))
+                                                      (list '#(syntax-object list->vector ((top)) (hygiene guile))
+                                                            t--c0a))))
                                                 tmp-1)
                                          (let ((tmp-1 ($sc-dispatch tmp '(#(atom "value") any))))
                                            (if tmp-1
diff --git a/module/ice-9/psyntax.scm b/module/ice-9/psyntax.scm
index 7d12469..13e15be 100644
--- a/module/ice-9/psyntax.scm
+++ b/module/ice-9/psyntax.scm
@@ -1,7 +1,7 @@
 ;;;; -*-scheme-*-
 ;;;;
 ;;;; Copyright (C) 2001, 2003, 2006, 2009, 2010, 2011,
-;;;;   2012, 2013 Free Software Foundation, Inc.
+;;;;   2012, 2013, 2016 Free Software Foundation, Inc.
 ;;;;
 ;;;; This library is free software; you can redistribute it and/or
 ;;;; modify it under the terms of the GNU Lesser General Public
@@ -460,9 +460,10 @@
               (make-letrec src in-order? ids vars val-exps body-exp)))))
 
 
-    ;; FIXME: use a faster gensym
     (define-syntax-rule (build-lexical-var src id)
-      (gensym (string-append (symbol->string id) "-")))
+      ;; Use a per-module counter instead of the global counter of
+      ;; 'gensym' so that the generated identifier is reproducible.
+      (module-gensym (symbol->string id)))
 
     (define-structure (syntax-object expression wrap module))
 
@@ -2598,7 +2599,9 @@
           (lambda (ls)
             (arg-check list? ls 'generate-temporaries)
             (let ((mod (cons 'hygiene (module-name (current-module)))))
-              (map (lambda (x) (wrap (gensym "t-") top-wrap mod)) ls))))
+              (map (lambda (x)
+                     (wrap (module-gensym "t-") top-wrap mod))
+                   ls))))
 
     (set! free-identifier=?
           (lambda (x y)
diff --git a/module/language/tree-il/fix-letrec.scm b/module/language/tree-il/fix-letrec.scm
index 60c87e3..23d37a8 100644
--- a/module/language/tree-il/fix-letrec.scm
+++ b/module/language/tree-il/fix-letrec.scm
@@ -1,6 +1,6 @@
 ;;; transformation of letrec into simpler forms
 
-;; Copyright (C) 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
+;; Copyright (C) 2009, 2010, 2011, 2012, 2016 Free Software Foundation, Inc.
 
 ;;;; This library is free software; you can redistribute it and/or
 ;;;; modify it under the terms of the GNU Lesser General Public
@@ -267,7 +267,9 @@
                     ;; bindings, in a `let' to indicate that order doesn't
                     ;; matter, and bind to their variables.
                     (list
-                     (let ((tmps (map (lambda (x) (gensym)) c)))
+                     (let ((tmps (map (lambda (x)
+                                        (module-gensym "fixlr"))
+                                      c)))
                        (make-let
                         #f (map cadr c) tmps (map caddr c)
                         (make-sequence
diff --git a/module/system/base/syntax.scm b/module/system/base/syntax.scm
index 249961d..d280869 100644
--- a/module/system/base/syntax.scm
+++ b/module/system/base/syntax.scm
@@ -1,6 +1,6 @@
 ;;; Guile VM specific syntaxes and utilities
 
-;; Copyright (C) 2001, 2009 Free Software Foundation, Inc
+;; Copyright (C) 2001, 2009, 2016 Free Software Foundation, Inc
 
 ;;; This library is free software; you can redistribute it and/or
 ;;; modify it under the terms of the GNU Lesser General Public
@@ -72,7 +72,7 @@
                            '()
                            (cons (car slots) (lp (cdr slots))))))
                (opts (list-tail slots (length reqs)))
-               (tail (gensym)))
+               (tail (module-gensym "defrec")))
           `(define (,(symbol-append 'make- stem) ,@reqs . ,tail)
              (let ,(map (lambda (o)
                           `(,(car o) (cond ((null? ,tail) ,(cadr o))
@@ -243,8 +243,8 @@
 ;; code looks good.
 
 (define-macro (transform-record type-and-common record . clauses)
-  (let ((r (gensym))
-        (rtd (gensym))
+  (let ((r (module-gensym "rec"))
+        (rtd (module-gensym "rtd"))
         (type-stem (trim-brackets (car type-and-common))))
     (define (make-stem s)
       (symbol-append type-stem '- s))

--=-=-=--

Message sent to bug-guile@HIDDEN:

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Subject: bug#20272: Support reproducible builds
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From: ludo@HIDDEN (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
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Date: Thu, 22 Dec 2016 00:53:20 +0100
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--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

With the attached patch I can build =E2=80=98stable-2.0=E2=80=99 with --rou=
nds=3D2 and
there are no discrepancies.

I=E2=80=99ll apply it next week if there are no objections.

Next I=E2=80=99ll adjust it for =E2=80=98master=E2=80=99.

Thanks,
Ludo=E2=80=99.


--=-=-=
Content-Type: text/x-patch; charset=utf-8
Content-Disposition: inline;
 filename=0001-psyntax-Generate-identifiers-in-a-deterministic-fash.patch
Content-Transfer-Encoding: quoted-printable
Content-Description: the patch

From 33ac270ad8d6f2fbb7fcb07294d1149aa82caf9e Mon Sep 17 00:00:00 2001
From: Mark H Weaver <mhw@HIDDEN>
Date: Fri, 12 Feb 2016 11:19:38 -0500
Subject: [PATCH] psyntax: Generate identifiers in a deterministic fashion.
MIME-Version: 1.0
Content-Type: text/plain; charset=3DUTF-8
Content-Transfer-Encoding: 8bit

Fixes <http://bugs.gnu.org/20272>.

* module/ice-9/boot-9.scm (module-generate-unique-id!)
(module-gensym): New procedures.
(module): Add 'next-unique-id' field.
(the-root-module): Inherit 'next-unique-id' value from early stub.
(make-module, make-autoload-interface): Adjust calls to
module-constructor.
* module/ice-9/psyntax.scm (gen-label, new-mark): Generate unique
identifiers from the module name and the per-module unique-id.
(build-lexical-var, generate-temporaries): Use
'module-gensym' instead of 'gensym'.
* module/ice-9/psyntax-pp.scm: Regenerate.
* module/language/tree-il/fix-letrec.scm (fix-letrec!): Use
'module-gensym' instead of 'gensym'.
* module/system/base/syntax.scm (define-record): Likewise.
(transform-record): Likewise.

Co-authored-by: Ludovic Court=C3=A8s <ludo@HIDDEN>
---
 module/ice-9/boot-9.scm                | 42 +++++++++++++++--
 module/ice-9/psyntax-pp.scm            | 83 +++++++++++++++++++++---------=
----
 module/ice-9/psyntax.scm               | 15 +++---
 module/language/tree-il/fix-letrec.scm |  6 ++-
 module/system/base/syntax.scm          |  8 ++--
 5 files changed, 106 insertions(+), 48 deletions(-)

diff --git a/module/ice-9/boot-9.scm b/module/ice-9/boot-9.scm
index 426d831..7f35325 100644
--- a/module/ice-9/boot-9.scm
+++ b/module/ice-9/boot-9.scm
@@ -1,6 +1,6 @@
 ;;; -*- mode: scheme; coding: utf-8; -*-
=20
-;;;; Copyright (C) 1995-2014  Free Software Foundation, Inc.
+;;;; Copyright (C) 1995-2014, 2016  Free Software Foundation, Inc.
 ;;;;
 ;;;; This library is free software; you can redistribute it and/or
 ;;;; modify it under the terms of the GNU Lesser General Public
@@ -384,6 +384,13 @@ If there is no handler at all, Guile prints an error a=
nd then exits."
 (define (module-ref module sym)
   (let ((v (module-variable module sym)))
     (if v (variable-ref v) (error "badness!" (pk module) (pk sym)))))
+(define module-generate-unique-id!
+  (let ((next-id 0))
+    (lambda (m)
+      (let ((i next-id))
+        (set! next-id (+ i 1))
+        i))))
+(define module-gensym gensym)
 (define (resolve-module . args)
   #f)
=20
@@ -2021,7 +2028,8 @@ VALUE."
      submodules
      submodule-binder
      public-interface
-     filename)))
+     filename
+     next-unique-id)))
=20
=20
 ;; make-module &opt size uses binder
@@ -2049,7 +2057,7 @@ VALUE."
                       (make-hash-table %default-import-size)
                       '()
                       (make-weak-key-hash-table 31) #f
-                      (make-hash-table 7) #f #f #f))
+                      (make-hash-table 7) #f #f #f 0))
=20
=20
 
@@ -2656,6 +2664,11 @@ VALUE."
   (let ((m (make-module 0)))
     (set-module-obarray! m (%get-pre-modules-obarray))
     (set-module-name! m '(guile))
+
+    ;; Inherit next-unique-id from preliminary stub of
+    ;; %module-get-next-unique-id! defined above.
+    (set-module-next-unique-id! m (module-generate-unique-id! #f))
+
     m))
=20
 ;; The root interface is a module that uses the same obarray as the
@@ -2684,6 +2697,11 @@ VALUE."
       the-root-module
       (error "unexpected module to resolve during module boot" name)))
=20
+(define (module-generate-unique-id! m)
+  (let ((i (module-next-unique-id m)))
+    (set-module-next-unique-id! m (+ i 1))
+    i))
+
 ;; Cheat.  These bindings are needed by modules.c, but we don't want
 ;; to move their real definition here because that would be unnatural.
 ;;
@@ -2714,6 +2732,21 @@ VALUE."
             (nested-define-module! (resolve-module '() #f) name mod)
             (accessor mod))))))
=20
+(define* (module-gensym #:optional (id " mg") (m (current-module)))
+  "Return a fresh symbol in the context of module M, based on ID (a
+string or symbol).  As long as M is a valid module, this procedure is
+deterministic."
+  (define (->string number)
+    (number->string number 16))
+
+  (if m
+      (string->symbol
+       (string-append id "-"
+                      (->string (hash (module-name m) most-positive-fixnum=
))
+                      "-"
+                      (->string (module-generate-unique-id! m))))
+      (gensym id)))
+
 (define (make-modules-in module name)
   (or (nested-ref-module module name)
       (let ((m (make-module 31)))
@@ -3013,7 +3046,7 @@ VALUE."
               #:warning "Failed to autoload ~a in ~a:\n" sym name))))
     (module-constructor (make-hash-table 0) '() b #f #f name 'autoload #f
                         (make-hash-table 0) '() (make-weak-value-hash-tabl=
e 31) #f
-                        (make-hash-table 0) #f #f #f)))
+                        (make-hash-table 0) #f #f #f 0)))
=20
 (define (module-autoload! module . args)
   "Have @var{module} automatically load the module named @var{name} when o=
ne
@@ -4305,7 +4338,6 @@ when none is available, reading FILE-NAME with READER=
."
                      syntax-locally-bound-identifiers
                      syntax-session-id)))
=20
-
 
=20
 ;;; Place the user in the guile-user module.
diff --git a/module/ice-9/psyntax-pp.scm b/module/ice-9/psyntax-pp.scm
index 1ec5107..3df661d 100644
--- a/module/ice-9/psyntax-pp.scm
+++ b/module/ice-9/psyntax-pp.scm
@@ -310,9 +310,7 @@
            (syntax-object-expression x)
            (join-marks (car w) (car (syntax-object-wrap x))))
          (values x (car w)))))
-   (gen-label
-     (lambda ()
-       (string-append "l-" (session-id) (symbol->string (gensym "-")))))
+   (gen-label (lambda () (symbol->string (module-gensym "l"))))
    (gen-labels
      (lambda (ls)
        (if (null? ls) '() (cons (gen-label) (gen-labels (cdr ls))))))
@@ -960,7 +958,7 @@
            ((transformer-environment (lambda (k) (k e r w s rib mod))))
            (rebuild-macro-output
              (p (source-wrap e (anti-mark w) s mod))
-             (gensym (string-append "m-" (session-id) "-")))))))
+             (module-gensym "m"))))))
    (expand-body
      (lambda (body outer-form r w mod)
        (let* ((r (cons '("placeholder" placeholder) r))
@@ -1472,7 +1470,8 @@
                                         s
                                         mod
                                         get-formals
-                                        (map (lambda (tmp-2 tmp-1 tmp) (co=
ns tmp (cons tmp-1 tmp-2)))
+                                        (map (lambda (tmp-bde397a-a85 tmp-=
bde397a-a84 tmp-bde397a-a83)
+                                               (cons tmp-bde397a-a83 (cons=
 tmp-bde397a-a84 tmp-bde397a-a85)))
                                              e2*
                                              e1*
                                              args*)))
@@ -1504,7 +1503,7 @@
    (gen-var
      (lambda (id)
        (let ((id (if (syntax-object? id) (syntax-object-expression id) id)=
))
-         (gensym (string-append (symbol->string id) "-")))))
+         (module-gensym (symbol->string id)))))
    (lambda-var-list
      (lambda (vars)
        (let lvl ((vars vars) (ls '()) (w '(())))
@@ -1766,7 +1765,8 @@
             (apply (lambda (args e1 e2)
                      (build-it
                        '()
-                       (map (lambda (tmp-2 tmp-1 tmp) (cons tmp (cons tmp-=
1 tmp-2)))
+                       (map (lambda (tmp-bde397a-c50 tmp-bde397a-c4f tmp-b=
de397a-c4e)
+                              (cons tmp-bde397a-c4e (cons tmp-bde397a-c4f =
tmp-bde397a-c50)))
                             e2
                             e1
                             args)))
@@ -1778,7 +1778,8 @@
                 (apply (lambda (docstring args e1 e2)
                          (build-it
                            (list (cons 'documentation (syntax->datum docst=
ring)))
-                           (map (lambda (tmp-2 tmp-1 tmp) (cons tmp (cons =
tmp-1 tmp-2)))
+                           (map (lambda (tmp-bde397a-c66 tmp-bde397a-c65 t=
mp-bde397a-c64)
+                                  (cons tmp-bde397a-c64 (cons tmp-bde397a-=
c65 tmp-bde397a-c66)))
                                 e2
                                 e1
                                 args)))
@@ -1801,7 +1802,8 @@
             (apply (lambda (args e1 e2)
                      (build-it
                        '()
-                       (map (lambda (tmp-2 tmp-1 tmp) (cons tmp (cons tmp-=
1 tmp-2)))
+                       (map (lambda (tmp-bde397a-c86 tmp-bde397a-c85 tmp-b=
de397a-c84)
+                              (cons tmp-bde397a-c84 (cons tmp-bde397a-c85 =
tmp-bde397a-c86)))
                             e2
                             e1
                             args)))
@@ -1813,7 +1815,8 @@
                 (apply (lambda (docstring args e1 e2)
                          (build-it
                            (list (cons 'documentation (syntax->datum docst=
ring)))
-                           (map (lambda (tmp-2 tmp-1 tmp) (cons tmp (cons =
tmp-1 tmp-2)))
+                           (map (lambda (tmp-bde397a-c9c tmp-bde397a-c9b t=
mp-bde397a-c9a)
+                                  (cons tmp-bde397a-c9a (cons tmp-bde397a-=
c9b tmp-bde397a-c9c)))
                                 e2
                                 e1
                                 args)))
@@ -2329,7 +2332,7 @@
         (if (not (list? x))
           (syntax-violation 'generate-temporaries "invalid argument" x)))
       (let ((mod (cons 'hygiene (module-name (current-module)))))
-        (map (lambda (x) (wrap (gensym "t-") '((top)) mod)) ls))))
+        (map (lambda (x) (wrap (module-gensym "t") '((top)) mod)) ls))))
   (set! free-identifier=3D?
     (lambda (x y)
       (let ((x x))
@@ -2699,7 +2702,8 @@
                          #f
                          k
                          '()
-                         (map (lambda (tmp-2 tmp-1 tmp) (list (cons tmp tm=
p-1) tmp-2))
+                         (map (lambda (tmp-bde397a-10fd tmp-bde397a-10fc t=
mp-bde397a-10fb)
+                                (list (cons tmp-bde397a-10fb tmp-bde397a-1=
0fc) tmp-bde397a-10fd))
                               template
                               pattern
                               keyword)))
@@ -2715,7 +2719,8 @@
                              #f
                              k
                              (list docstring)
-                             (map (lambda (tmp-2 tmp-1 tmp) (list (cons tm=
p tmp-1) tmp-2))
+                             (map (lambda (tmp-bde397a-2 tmp-bde397a-1 tmp=
-bde397a)
+                                    (list (cons tmp-bde397a tmp-bde397a-1)=
 tmp-bde397a-2))
                                   template
                                   pattern
                                   keyword)))
@@ -2730,7 +2735,8 @@
                                  dots
                                  k
                                  '()
-                                 (map (lambda (tmp-2 tmp-1 tmp) (list (con=
s tmp tmp-1) tmp-2))
+                                 (map (lambda (tmp-bde397a-112f tmp-bde397=
a-112e tmp-bde397a-112d)
+                                        (list (cons tmp-bde397a-112d tmp-b=
de397a-112e) tmp-bde397a-112f))
                                       template
                                       pattern
                                       keyword)))
@@ -2746,7 +2752,8 @@
                                      dots
                                      k
                                      (list docstring)
-                                     (map (lambda (tmp-2 tmp-1 tmp) (list =
(cons tmp tmp-1) tmp-2))
+                                     (map (lambda (tmp-bde397a-114e tmp-bd=
e397a-114d tmp-bde397a-114c)
+                                            (list (cons tmp-bde397a-114c t=
mp-bde397a-114d) tmp-bde397a-114e))
                                           template
                                           pattern
                                           keyword)))
@@ -2865,7 +2872,9 @@
                                              (apply (lambda (p)
                                                       (if (=3D lev 0)
                                                         (quasilist*
-                                                          (map (lambda (tm=
p) (list "value" tmp)) p)
+                                                          (map (lambda (tm=
p-bde397a-11b3)
+                                                                 (list "va=
lue" tmp-bde397a-11b3))
+                                                               p)
                                                           (quasi q lev))
                                                         (quasicons
                                                           (quasicons
@@ -2883,7 +2892,9 @@
                                                  (apply (lambda (p)
                                                           (if (=3D lev 0)
                                                             (quasiappend
-                                                              (map (lambda=
 (tmp) (list "value" tmp)) p)
+                                                              (map (lambda=
 (tmp-bde397a-11b8)
+                                                                     (list=
 "value" tmp-bde397a-11b8))
+                                                                   p)
                                                               (quasi q lev=
))
                                                             (quasicons
                                                               (quasicons
@@ -2916,7 +2927,9 @@
                               (if tmp
                                 (apply (lambda (p)
                                          (if (=3D lev 0)
-                                           (quasilist* (map (lambda (tmp) =
(list "value" tmp)) p) (vquasi q lev))
+                                           (quasilist*
+                                             (map (lambda (tmp-bde397a-11c=
e) (list "value" tmp-bde397a-11ce)) p)
+                                             (vquasi q lev))
                                            (quasicons
                                              (quasicons
                                                '("quote" #(syntax-object u=
nquote ((top)) (hygiene guile)))
@@ -2932,7 +2945,7 @@
                                     (apply (lambda (p)
                                              (if (=3D lev 0)
                                                (quasiappend
-                                                 (map (lambda (tmp) (list =
"value" tmp)) p)
+                                                 (map (lambda (tmp-bde397a=
-11d3) (list "value" tmp-bde397a-11d3)) p)
                                                  (vquasi q lev))
                                                (quasicons
                                                  (quasicons
@@ -3020,7 +3033,7 @@
                               (let ((tmp-1 ls))
                                 (let ((tmp ($sc-dispatch tmp-1 'each-any)))
                                   (if tmp
-                                    (apply (lambda (t) (cons "vector" t)) =
tmp)
+                                    (apply (lambda (t-bde397a-121c) (cons =
"vector" t-bde397a-121c)) tmp)
                                     (syntax-violation
                                       #f
                                       "source expression failed to match a=
ny pattern"
@@ -3028,7 +3041,8 @@
                    (let ((tmp y))
                      (let ((tmp-1 ($sc-dispatch tmp '(#(atom "quote") each=
-any))))
                        (if tmp-1
-                         (apply (lambda (y) (k (map (lambda (tmp) (list "q=
uote" tmp)) y)))
+                         (apply (lambda (y)
+                                  (k (map (lambda (tmp-bde397a) (list "quo=
te" tmp-bde397a)) y)))
                                 tmp-1)
                          (let ((tmp-1 ($sc-dispatch tmp '(#(atom "list") .=
 each-any))))
                            (if tmp-1
@@ -3037,7 +3051,8 @@
                                (if tmp-1
                                  (apply (lambda (y z) (f z (lambda (ls) (k=
 (append y ls))))) tmp-1)
                                  (let ((else tmp))
-                                   (let ((tmp x)) (let ((t tmp)) (list "li=
st->vector" t)))))))))))))))))
+                                   (let ((tmp x))
+                                     (let ((t-bde397a tmp)) (list "list->v=
ector" t-bde397a)))))))))))))))))
        (emit (lambda (x)
                (let ((tmp x))
                  (let ((tmp-1 ($sc-dispatch tmp '(#(atom "quote") any))))
@@ -3050,7 +3065,8 @@
                                   (let ((tmp-1 (map emit x)))
                                     (let ((tmp ($sc-dispatch tmp-1 'each-a=
ny)))
                                       (if tmp
-                                        (apply (lambda (t) (cons '#(syntax=
-object list ((top)) (hygiene guile)) t))
+                                        (apply (lambda (t-bde397a)
+                                                 (cons '#(syntax-object li=
st ((top)) (hygiene guile)) t-bde397a))
                                                tmp)
                                         (syntax-violation
                                           #f
@@ -3066,8 +3082,10 @@
                                           (let ((tmp-1 (list (emit (car x*=
)) (f (cdr x*)))))
                                             (let ((tmp ($sc-dispatch tmp-1=
 '(any any))))
                                               (if tmp
-                                                (apply (lambda (t-1 t)
-                                                         (list '#(syntax-o=
bject cons ((top)) (hygiene guile)) t-1 t))
+                                                (apply (lambda (t-bde397a-=
125a t-bde397a)
+                                                         (list '#(syntax-o=
bject cons ((top)) (hygiene guile))
+                                                               t-bde397a-1=
25a
+                                                               t-bde397a))
                                                        tmp)
                                                 (syntax-violation
                                                   #f
@@ -3080,8 +3098,9 @@
                                           (let ((tmp-1 (map emit x)))
                                             (let ((tmp ($sc-dispatch tmp-1=
 'each-any)))
                                               (if tmp
-                                                (apply (lambda (t)
-                                                         (cons '#(syntax-o=
bject append ((top)) (hygiene guile)) t))
+                                                (apply (lambda (t-bde397a)
+                                                         (cons '#(syntax-o=
bject append ((top)) (hygiene guile))
+                                                               t-bde397a))
                                                        tmp)
                                                 (syntax-violation
                                                   #f
@@ -3094,8 +3113,9 @@
                                               (let ((tmp-1 (map emit x)))
                                                 (let ((tmp ($sc-dispatch t=
mp-1 'each-any)))
                                                   (if tmp
-                                                    (apply (lambda (t)
-                                                             (cons '#(synt=
ax-object vector ((top)) (hygiene guile)) t))
+                                                    (apply (lambda (t-bde3=
97a)
+                                                             (cons '#(synt=
ax-object vector ((top)) (hygiene guile))
+                                                                   t-bde39=
7a))
                                                            tmp)
                                                     (syntax-violation
                                                       #f
@@ -3106,8 +3126,9 @@
                                        (if tmp-1
                                          (apply (lambda (x)
                                                   (let ((tmp (emit x)))
-                                                    (let ((t tmp))
-                                                      (list '#(syntax-obje=
ct list->vector ((top)) (hygiene guile)) t))))
+                                                    (let ((t-bde397a-127e =
tmp))
+                                                      (list '#(syntax-obje=
ct list->vector ((top)) (hygiene guile))
+                                                            t-bde397a-127e=
))))
                                                 tmp-1)
                                          (let ((tmp-1 ($sc-dispatch tmp '(=
#(atom "value") any))))
                                            (if tmp-1
diff --git a/module/ice-9/psyntax.scm b/module/ice-9/psyntax.scm
index 79b353d..c09a551 100644
--- a/module/ice-9/psyntax.scm
+++ b/module/ice-9/psyntax.scm
@@ -1,7 +1,7 @@
 ;;;; -*-scheme-*-
 ;;;;
 ;;;; Copyright (C) 2001, 2003, 2006, 2009, 2010, 2011,
-;;;;   2012, 2013 Free Software Foundation, Inc.
+;;;;   2012, 2013, 2016 Free Software Foundation, Inc.
 ;;;;
 ;;;; This library is free software; you can redistribute it and/or
 ;;;; modify it under the terms of the GNU Lesser General Public
@@ -460,9 +460,10 @@
               (make-letrec src in-order? ids vars val-exps body-exp)))))
=20
=20
-    ;; FIXME: use a faster gensym
     (define-syntax-rule (build-lexical-var src id)
-      (gensym (string-append (symbol->string id) "-")))
+      ;; Use a per-module counter instead of the global counter of
+      ;; 'gensym' so that the generated identifier is reproducible.
+      (module-gensym (symbol->string id)))
=20
     (define-structure (syntax-object expression wrap module))
=20
@@ -642,7 +643,7 @@
     ;; labels must be comparable with "eq?", have read-write invariance,
     ;; and distinct from symbols.
     (define (gen-label)
-      (string-append "l-" (session-id) (symbol->string (gensym "-"))))
+      (symbol->string (module-gensym "l")))
=20
     (define gen-labels
       (lambda (ls)
@@ -671,7 +672,7 @@
                    (cons 'shift (wrap-subst w)))))
=20
     (define-syntax-rule (new-mark)
-      (gensym (string-append "m-" (session-id) "-")))
+      (module-gensym "m"))
=20
     ;; make-empty-ribcage and extend-ribcage maintain list-based ribcages =
for
     ;; internal definitions, in which the ribcages are built incrementally
@@ -2591,7 +2592,9 @@
           (lambda (ls)
             (arg-check list? ls 'generate-temporaries)
             (let ((mod (cons 'hygiene (module-name (current-module)))))
-              (map (lambda (x) (wrap (gensym "t-") top-wrap mod)) ls))))
+              (map (lambda (x)
+                     (wrap (module-gensym "t") top-wrap mod))
+                   ls))))
=20
     (set! free-identifier=3D?
           (lambda (x y)
diff --git a/module/language/tree-il/fix-letrec.scm b/module/language/tree-=
il/fix-letrec.scm
index 60c87e3..23d37a8 100644
--- a/module/language/tree-il/fix-letrec.scm
+++ b/module/language/tree-il/fix-letrec.scm
@@ -1,6 +1,6 @@
 ;;; transformation of letrec into simpler forms
=20
-;; Copyright (C) 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
+;; Copyright (C) 2009, 2010, 2011, 2012, 2016 Free Software Foundation, In=
c.
=20
 ;;;; This library is free software; you can redistribute it and/or
 ;;;; modify it under the terms of the GNU Lesser General Public
@@ -267,7 +267,9 @@
                     ;; bindings, in a `let' to indicate that order doesn't
                     ;; matter, and bind to their variables.
                     (list
-                     (let ((tmps (map (lambda (x) (gensym)) c)))
+                     (let ((tmps (map (lambda (x)
+                                        (module-gensym "fixlr"))
+                                      c)))
                        (make-let
                         #f (map cadr c) tmps (map caddr c)
                         (make-sequence
diff --git a/module/system/base/syntax.scm b/module/system/base/syntax.scm
index 249961d..d280869 100644
--- a/module/system/base/syntax.scm
+++ b/module/system/base/syntax.scm
@@ -1,6 +1,6 @@
 ;;; Guile VM specific syntaxes and utilities
=20
-;; Copyright (C) 2001, 2009 Free Software Foundation, Inc
+;; Copyright (C) 2001, 2009, 2016 Free Software Foundation, Inc
=20
 ;;; This library is free software; you can redistribute it and/or
 ;;; modify it under the terms of the GNU Lesser General Public
@@ -72,7 +72,7 @@
                            '()
                            (cons (car slots) (lp (cdr slots))))))
                (opts (list-tail slots (length reqs)))
-               (tail (gensym)))
+               (tail (module-gensym "defrec")))
           `(define (,(symbol-append 'make- stem) ,@reqs . ,tail)
              (let ,(map (lambda (o)
                           `(,(car o) (cond ((null? ,tail) ,(cadr o))
@@ -243,8 +243,8 @@
 ;; code looks good.
=20
 (define-macro (transform-record type-and-common record . clauses)
-  (let ((r (gensym))
-        (rtd (gensym))
+  (let ((r (module-gensym "rec"))
+        (rtd (module-gensym "rtd"))
         (type-stem (trim-brackets (car type-and-common))))
     (define (make-stem s)
       (symbol-append type-stem '- s))
--=20
2.10.2


--=-=-=--

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 <87mvfygjs1.fsf@HIDDEN> <87eg12fbog.fsf@HIDDEN>
 <871sx0vnyn.fsf@HIDDEN>
Date: Fri, 30 Dec 2016 22:00:21 +0100
In-Reply-To: <871sx0vnyn.fsf@HIDDEN> ("Ludovic
 \=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\=
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ludo@HIDDEN (Ludovic Court=C3=A8s) skribis:

> With the attached patch I can build =E2=80=98stable-2.0=E2=80=99 with --r=
ounds=3D2 and
> there are no discrepancies.
>
> I=E2=80=99ll apply it next week if there are no objections.

Pushed as 458ae248ab353af24e27b8fb3e5fe7a8b78ae219!

Ludo=E2=80=99.

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On Thu 22 Dec 2016 00:53, ludo@HIDDEN (Ludovic Court=C3=A8s) writes:

> +(define (module-generate-unique-id! m)
> +  (let ((i (module-next-unique-id m)))
> +    (set-module-next-unique-id! m (+ i 1))
> +    i))

This introduces a race condition when expanding from multiple threads at
once.  Any plan here?

Andy

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Hi!

Andy Wingo <wingo@HIDDEN> skribis:

> On Thu 22 Dec 2016 00:53, ludo@HIDDEN (Ludovic Court=C3=A8s) writes:
>
>> +(define (module-generate-unique-id! m)
>> +  (let ((i (module-next-unique-id m)))
>> +    (set-module-next-unique-id! m (+ i 1))
>> +    i))
>
> This introduces a race condition when expanding from multiple threads at
> once.  Any plan here?

Good point!  We could grab a per-module mutex for that, though that=E2=80=
=99s
again a fat mutex.

Thoughts?

Ludo=E2=80=99.

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Hi,

On Sun 05 Mar 2017 21:49, ludo@HIDDEN (Ludovic Court=C3=A8s) writes:

> Andy Wingo <wingo@HIDDEN> skribis:
>
>> On Thu 22 Dec 2016 00:53, ludo@HIDDEN (Ludovic Court=C3=A8s) writes:
>>
>>> +(define (module-generate-unique-id! m)
>>> +  (let ((i (module-next-unique-id m)))
>>> +    (set-module-next-unique-id! m (+ i 1))
>>> +    i))
>>
>> This introduces a race condition when expanding from multiple threads at
>> once.  Any plan here?
>
> Good point!  We could grab a per-module mutex for that, though that=E2=80=
=99s
> again a fat mutex.
>
> Thoughts?

I would use atomic boxes if possible, but they are in another module :/
Even mutexes aren't directly available in boot-9 any more... Alternately
we can make a new primitive for module-generate-unique-id! which can
obviously use C.  That's probably the easiest option, sadly!

Andy

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Currently .go files embed randomly-generated symbols stemming from
=E2=80=98syntax-session-id=E2=80=99, which prevents reproducible builds (see
<https://lists.gnu.org/archive/html/guix-devel/2013-09/msg00159.html>.)

One way to fix it would be to allow users to specify a random seed used
when generating session ids, and to make that available as a
command-line option to =E2=80=98guild compile=E2=80=99.  (GCC does somethin=
g similar
with its =E2=80=98-frandom-seed=E2=80=99 option.)

Probably, =E2=80=98syntax-session-id=E2=80=99 would have to be a SRFI-39 pa=
rameter and
we would need a =E2=80=98fresh-syntax-session-id=E2=80=99 procedure that wo=
uld take a
seed as a parameter.  In turn, =E2=80=98fresh_syntax_session_id=E2=80=99 wo=
uld need to
take that extra argument, and it would need to be changed to not read
directly from /dev/urandom.

WDYT?

Ludo=E2=80=99.



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ludo@HIDDEN (Ludovic Court=C3=A8s) skribis:

> ludo@HIDDEN (Ludovic Court=C3=A8s) skribis:
>
>> With the attached patch I can build =E2=80=98stable-2.0=E2=80=99 with --=
rounds=3D2 and
>> there are no discrepancies.
>>
>> I=E2=80=99ll apply it next week if there are no objections.
>
> Pushed as 458ae248ab353af24e27b8fb3e5fe7a8b78ae219!

Applied as commit 84a740d86a5afd235f1b47ac66c88db010b1d56b in master (2.1).

I haven=E2=80=99t yet done a --rounds=3D2 build of master, but hopefully th=
at=E2=80=99ll
be fine!

Ludo=E2=80=99.


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Subject: bug#20272: closed (Re: bug#20272: Support reproducible builds)
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Your bug report

#20272: Support reproducible builds

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

The explanation is attached below, along with your original report.
If you require more details, please reply to 20272 <at> debbugs.gnu.org.

--=20
20272: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D20272
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To: Jan Nieuwenhuizen <janneke@HIDDEN>
Subject: Re: bug#20272: Support reproducible builds
References: <87bmxxnjd7.fsf@HIDDEN> <87shqtwxcb.fsf@HIDDEN>
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ludo@HIDDEN (Ludovic Court=C3=A8s) skribis:

> ludo@HIDDEN (Ludovic Court=C3=A8s) skribis:
>
>> With the attached patch I can build =E2=80=98stable-2.0=E2=80=99 with --=
rounds=3D2 and
>> there are no discrepancies.
>>
>> I=E2=80=99ll apply it next week if there are no objections.
>
> Pushed as 458ae248ab353af24e27b8fb3e5fe7a8b78ae219!

Applied as commit 84a740d86a5afd235f1b47ac66c88db010b1d56b in master (2.1).

I haven=E2=80=99t yet done a --rounds=3D2 build of master, but hopefully th=
at=E2=80=99ll
be fine!

Ludo=E2=80=99.


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From: ludo@HIDDEN (Ludovic =?utf-8?Q?Court=C3=A8s?=)
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Subject: Support reproducible builds
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Currently .go files embed randomly-generated symbols stemming from
=E2=80=98syntax-session-id=E2=80=99, which prevents reproducible builds (see
<https://lists.gnu.org/archive/html/guix-devel/2013-09/msg00159.html>.)

One way to fix it would be to allow users to specify a random seed used
when generating session ids, and to make that available as a
command-line option to =E2=80=98guild compile=E2=80=99.  (GCC does somethin=
g similar
with its =E2=80=98-frandom-seed=E2=80=99 option.)

Probably, =E2=80=98syntax-session-id=E2=80=99 would have to be a SRFI-39 pa=
rameter and
we would need a =E2=80=98fresh-syntax-session-id=E2=80=99 procedure that wo=
uld take a
seed as a parameter.  In turn, =E2=80=98fresh_syntax_session_id=E2=80=99 wo=
uld need to
take that extra argument, and it would need to be changed to not read
directly from /dev/urandom.

WDYT?

Ludo=E2=80=99.



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unarchive 20272

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I've just stumpled upon this as within Nixpkgs we have a pending [PR]
that references this issue. Since it reads as if it should be solved in
Guile 2.1+ but still occurs for us in nixpkgs when using parallel builds
(aka using multiple cores in a single build) I thought it might be a
good to get in touch.

Updating our expression to Guile 3.0.2 did not fix the reproducibility
issues either (when built using multiple cores).

I've just now tried a Guix 1.1.0 QEMU image and invoked `guix build
--round=2 -K guile --check -c 8` and it also wasn't reproducible. A
bunch of .go files showed differences between the builds.

Am I missings something?

Would gladly help if there is something I can do.

[PR]: https://github.com/NixOS/nixpkgs/pull/78778

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Subject: bug#20272: Support reproducible builds
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I've just stumpled upon this as within Nixpkgs we have a pending [PR]
that references this issue. Since it reads as if it should be solved in
Guile 2.1+ but still occurs for us in nixpkgs when using parallel builds
(aka using multiple cores in a single build) I thought it might be a
good to get in touch.

Updating our expression to Guile 3.0.2 did not fix the reproducibility
issues either (when built using multiple cores).

I've just now tried a Guix 1.1.0 QEMU image and invoked `guix build
--round=2 -K guile --check -c 8` and it also wasn't reproducible. A
bunch of .go files showed differences between the builds.

Am I missings something?

Would gladly help if there is something I can do.

[PR]: https://github.com/NixOS/nixpkgs/pull/78778

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From: Maxim Cournoyer <maxim.cournoyer@HIDDEN>
To: ludo@HIDDEN (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: bug#20272: Support reproducible builds
References: <87twws88hr.fsf@HIDDEN>
Date: Thu, 08 Oct 2020 12:19:23 -0400
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unarchive 20272
reopen 20272
severity 20272 important
thanks

Hello!

I've hit a .go non-reproducibility issue fairly trivially on
core-updates.  I think it sufficed to change a core library file (e.g.,
commit 7102c18678dc02d5ee6c77a9a70ae344482af841 which touched (guix
build utils)) and then attempting to build something with --rounds=3D2
flagged it:

--8<---------------cut here---------------start------------->8---
./pre-inst-env guix build --rounds=3D2 mit-krb5 -K --no-substitutes

building /gnu/store/74fh18318l4f9zmkl3y3klyasnc1jqc2-module-import-compiled=
.drv...
building /gnu/store/40wzfd27s4i50rc1q86dqks986ff8fq2-module-import-compiled=
.drv...
building /gnu/store/dlzy98gvyddjg3zrv5f1l3nvgjvaxjmf-module-import-compiled=
.drv...
building /gnu/store/0i3sqm9cl2rbbikfas2y28wibnmqr1pa-module-import-compiled=
.drv...
[ 1/ 2] Loading './guix/build/utils.scm'...
[ 2/ 2] Compiling './guix/build/utils.scm'...
building /gnu/store/dlzy98gvyddjg3zrv5f1l3nvgjvaxjmf-module-import-compiled=
.drv...
building /gnu/store/40wzfd27s4i50rc1q86dqks986ff8fq2-module-import-compiled=
.drv...
output =E2=80=98/gnu/store/czbmygd6id8qk3bfb0rcjjkmpn5bh7f1-module-import-c=
ompiled=E2=80=99 of =E2=80=98/gnu/store/dlzy98gvyddjg3zrv5f1l3nvgjvaxjmf-mo=
dule-import-compiled.drv=E2=80=99 differs from =E2=80=98/gnu/store/czbmygd6=
id8qk3bfb0rcjjkmpn5bh7f1-module-import-compiled-check=E2=80=99 from previou=
s round
build of /gnu/store/dlzy98gvyddjg3zrv5f1l3nvgjvaxjmf-module-import-compiled=
.drv failed
View build log at '/var/log/guix/drvs/dl/zy98gvyddjg3zrv5f1l3nvgjvaxjmf-mod=
ule-import-compiled.drv.bz2'.
--8<---------------cut here---------------end--------------->8---

And here's the diffoscope output:

--8<---------------cut here---------------start------------->8---
 diffoscope /gnu/store/czbmygd6id8qk3bfb0rcjjkmpn5bh7f1-module-import-compi=
led{,-check}
--- /gnu/store/czbmygd6id8qk3bfb0rcjjkmpn5bh7f1-module-import-compiled
+++ /gnu/store/czbmygd6id8qk3bfb0rcjjkmpn5bh7f1-module-import-compiled-check
=E2=94=82   --- /gnu/store/czbmygd6id8qk3bfb0rcjjkmpn5bh7f1-module-import-c=
ompiled/guix
=E2=94=9C=E2=94=80=E2=94=80 +++ /gnu/store/czbmygd6id8qk3bfb0rcjjkmpn5bh7f1=
-module-import-compiled-check/guix
=E2=94=82 =E2=94=82   --- /gnu/store/czbmygd6id8qk3bfb0rcjjkmpn5bh7f1-modul=
e-import-compiled/guix/build
=E2=94=82 =E2=94=9C=E2=94=80=E2=94=80 +++ /gnu/store/czbmygd6id8qk3bfb0rcjj=
kmpn5bh7f1-module-import-compiled-check/guix/build
=E2=94=82 =E2=94=82 =E2=94=82   --- /gnu/store/czbmygd6id8qk3bfb0rcjjkmpn5b=
h7f1-module-import-compiled/guix/build/utils.go
=E2=94=82 =E2=94=82 =E2=94=9C=E2=94=80=E2=94=80 +++ /gnu/store/czbmygd6id8q=
k3bfb0rcjjkmpn5bh7f1-module-import-compiled-check/guix/build/utils.go
=E2=94=82 =E2=94=82 =E2=94=82=E2=94=84 xxd not available in path. Falling b=
ack to Python hexlify.
=E2=94=82 =E2=94=82 =E2=94=82 @@ -160,24 +160,24 @@
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=E2=94=82 =E2=94=82 =E2=94=82 +4f2d393238a4030c00f513f4120001a4030c00f613e3=
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=E2=94=82 =E2=94=82 =E2=94=82  030c00f713e213ef13f013f6110004a4030c00f86700=
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=E2=94=82 =E2=94=82 =E2=94=82  030c00f913f8130613071308110004a4030c00fa13df=
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=E2=94=82 =E2=94=82 =E2=94=82  030c00fb67000004696e6974a4030c00fc13df13fb13=
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=E2=94=82 =E2=94=82 =E2=94=82  fd67000006676574637764a4030c00fe13df13fd13f7=
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=E2=94=82 =E2=94=82 =E2=94=82  13fe110001a4030c010013fc13ff110002a4030c0101=
140100110001a4030c01
=E2=94=82 =E2=94=82 =E2=94=82  026700000c64796e616d69632d77696e64a4030c0103=
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13df14010413f713f912
=E2=94=82 =E2=94=82 =E2=94=82 @@ -199,23 +199,23 @@
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=E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82 +Links: 1
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=E2=94=82 =E2=94=82 =E2=94=82 =E2=94=82  Modify: 1970-01-01 00:00:01.000000=
000 +0000
--8<---------------cut here---------------end--------------->8---

Thank you,

Maxim

Message received at fakecontrol@fakecontrolmessage:

Received: (at fakecontrol) by fakecontrolmessage;
To: internal_control <at> debbugs.gnu.org
From: Debbugs Internal Request <help-debbugs@HIDDEN>
Subject: Internal Control
Message-Id: Did not alter fixed versions and reopened.
Date: Thu, 08 Oct 2020 16:20:03 +0000
User-Agent: Fakemail v42.6.9

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# The action:
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Last modified: Thu, 8 Oct 2020 16:30:02 UTC

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.