GNU bug report logs - #3883
Interleaved builds in separate trees create different versions

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Package: emacs; Severity: minor; Reported by: Rob Browning <rlb@HIDDEN>; Keywords: unreproducible; dated Sun, 19 Jul 2009 20:10:05 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.
Added tag(s) unreproducible. Request was from Stefan Kangas <stefankangas@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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To: 3883 <at> debbugs.gnu.org
From: Mauro Aranda <maurooaranda@HIDDEN>
Subject: Re: bug#3883: Interleaved builds in separate trees create different
 versions
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Rob Browning <rlb@HIDDEN> writes:

 > If you try to build two trees from the same source directory at the
 > same time, alternating the respective SRCDIR/configure, make, and make
 > install operations, the first tree will end up with a ".2" version while
 > the second tree will end up with a ".1" version.  This doesn't happen if
 > you don't have separate "make" and "make install" steps.
 >
 > I don't know if this behavior is intentional, but in case it's not, I
 > thought I'd report it.
 >
 > You can trivially reproduce the situation with this script (using the
 > 23.0.96 archive), and note that the same thing still happens if you omit
 > the differing configure arguments:
 >
 > #!/bin/bash
 >
 > set -e
 > set -x
 >
 > tar xf emacs-23.0.96.tar.gz
 >
 > mkdir -p build/1
 > mkdir -p build/2
 >
 > (cd build/1 && ../../emacs-23.0.96/configure --with-x=yes)
 > (cd build/2 && ../../emacs-23.0.96/configure --with-x=no)
 >
 > (cd build/1 && make)
 > (cd build/2 && make)
 >
 > mkdir -p install/1
 > mkdir -p install/2
 >
 > inst_1="$(pwd)/install/1"
 > inst_2="$(pwd)/install/2"
 >
 > (cd build/1 && make DESTDIR="${inst_1}")
 > (cd build/2 && make DESTDIR="${inst_2}")
 >
 > find -name "emacs-23.*"
 > find -name "DOC*"

I'm not able to reproduce it.  This was 16 years ago, perhaps it got
fixed someway? I can't tell it from the Makefile, but perhaps someone
can.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#3883; Package emacs. Full text available.

Message received at 3883 <at> debbugs.gnu.org:


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From: Glenn Morris <rgm@HIDDEN>
To: Rob Browning <rlb@HIDDEN>
Subject: Re: Bug#3883: Interleaved builds in separate trees create different
	versions
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(A very delayed reply)

Rob Browning wrote:

> If you try to build two trees from the same source directory at the
> same time, alternating the respective SRCDIR/configure, make, and make
> install operations, the first tree will end up with a ".2" version while
> the second tree will end up with a ".1" version.

I think this happens because the second make recompiles the .el files,
and the output .elc files are written into the lisp/ directory in the
source-tree, not the build directory. Then the first build thinks it
need to redump Emacs, because the .elc files have newer timestamps.

Neither make should need to compile the .el files at all, but this is
tricky, see http://debbugs.gnu.org/cgi/bugreport.cgi?bug=2151 .

Arguably, the compiled .elc files should be written into the build
tree's lisp/ directory, not the source lisp/ directory.
But, they are supposed to be platform independent, so maybe the current
set-up is designed to let them be shared between all builds.
But, they get recompiled anyway, so that doesn't actually work...
Information forwarded to owner <at> debbugs.gnu.org, bug-gnu-emacs@HIDDEN:
bug#3883; Package emacs. Full text available.
Severity set to `minor' from `normal' Request was from Glenn Morris <rgm@HIDDEN> to control@HIDDEN. Full text available.

Message received at submit@HIDDEN:


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To: bug-gnu-emacs@HIDDEN
Subject: Interleaved builds in separate trees create different versions
From: Rob Browning <rlb@HIDDEN>
Date: Sun, 19 Jul 2009 13:02:33 -0700
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If you try to build two trees from the same source directory at the
same time, alternating the respective SRCDIR/configure, make, and make
install operations, the first tree will end up with a ".2" version while
the second tree will end up with a ".1" version.  This doesn't happen if
you don't have separate "make" and "make install" steps.

I don't know if this behavior is intentional, but in case it's not, I
thought I'd report it.

You can trivially reproduce the situation with this script (using the
23.0.96 archive), and note that the same thing still happens if you omit
the differing configure arguments:

#!/bin/bash

set -e
set -x

tar xf emacs-23.0.96.tar.gz

mkdir -p build/1
mkdir -p build/2

(cd build/1 && ../../emacs-23.0.96/configure --with-x=yes)
(cd build/2 && ../../emacs-23.0.96/configure --with-x=no)

(cd build/1 && make)
(cd build/2 && make)

mkdir -p install/1
mkdir -p install/2

inst_1="$(pwd)/install/1"
inst_2="$(pwd)/install/2"

(cd build/1 && make DESTDIR="${inst_1}")
(cd build/2 && make DESTDIR="${inst_2}")

find -name "emacs-23.*"
find -name "DOC*"

-- 
Rob Browning
rlb @defaultvalue.org and @debian.org; previously @cs.utexas.edu
GPG as of 2002-11-03 14DD 432F AE39 534D B592 F9A0 25C8 D377 8C7E 73A4
Acknowledgement sent to Rob Browning <rlb@HIDDEN>:
New bug report received and forwarded. Copy sent to Emacs Bugs <bug-gnu-emacs@HIDDEN>. Full text available.
Report forwarded to bug-submit-list@HIDDEN, Emacs Bugs <bug-gnu-emacs@HIDDEN>:
bug#3883; Package emacs. Full text available.
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