Your message dated Mon, 23 Dec 2019 20:16:06 +0000
with message-id <[email protected]>
and subject line Bug#889925: fixed in vala 0.46.5-1.1
has caused the Debian Bug report #889925,
regarding valac is unusable for cross-compilation
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
889925: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=889925
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Source: vala
Version: 0.38.7-1
User: [email protected]
Usertags: rebootstrap
valac is presently unusable for cross-compilation. There are a number of
issues and unfortunately, this isn't going to be fixable easily.
The first issue you bump into is that executing valac gives an "Exec
format error". This is typical for build tools being installed from the
host architecture. As it happens, valac is implicitly marked Multi-Arch:
no, so it is installed for the build architecture. The simple fix for
this is to mark it Multi-Arch: foreign. Unfortunately, that is not
correct.
valac runs gcc and pkg-config. Both of these tools have
architecture-dependent behaviour and valac inherits that
architecture-dependence. Thus marking it Multi-Arch: foreign is wrong.
The typical solution to this problem is to encode the architecture into
the program name. On amd64, you can call gcc as x86_64-linux-gnu-gcc and
you can call x86_64-linux-gnu-pkg-config. However, these later
invocations also work for cross compilation. So what we need here is
adding the architecture to the valac command name.
In the simplest case, we could do:
ln -s valac .../usr/bin/${DEB_HOST_GNU_TYPE}-valac
Unfortunately, that won't fix any cross compilation issues. What we'd
want here is to have a valac executable for the build architecture
running the tools for another architecture. Thus I propose adding the
following shell script to the valac binary package:
#!/bin/sh
exec valac "--cc=${CC:-@DEB_HOST_GNU_TYPE@-gcc}"
"--pkg-config=${PKG_CONFIG:-@DEB_HOST_GNU_TYPE@-pkg-config}" "$@"
You'd interpolate @DEB_HOST_GNU_TYPE@ at package build time and install
it as /usr/bin/${DEB_HOST_GNU_TYPE}-valac. It'd run valac with the
appropriate compiler and pkg-config for the prefix it was installed as.
Now that still doesn't fix the "Exec format error". So we'd also need a
new binary package (probably called "valac-bin"), move /usr/bin/valac to
that new package, add a dependency from valac to the new package and
mark the new package Multi-Arch: foreign. That's not fully correct as
valac is still architecture-dependent, but anyone wanting a particular
architecture's behaviour can and should simply run
${DEB_HOST_GNU_TYPE}-valac. We do the same for pkg-config and that
appears to work fairly well. Consumers need to add this prefix of course
and I sent a patch for AM_PROG_VALAC (#889920) already.
Implementation plan:
* Create a new binary package valac-bin.
* Move /usr/bin/valac to valac-bin (add Breaks/Replaces).
* Add a valac-bin (= ${binary:Version}) to valac's Depends.
* The description of valac-bin should say something like "don't install
this package directly use valac instead". It should make clear that
valac-bin is an implementation detail.
* Mark valac-bin Multi-Arch: foreign.
* Add the above script as /usr/bin/${DEB_HOST_GNU_TYPE}-valac to the
valac binary package.
Do you agree with that approach? Can you help implement it?
Helmut
--- End Message ---
--- Begin Message ---
Source: vala
Source-Version: 0.46.5-1.1
We believe that the bug you reported is fixed in the latest version of
vala, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Helmut Grohne <[email protected]> (supplier of updated vala package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Tue, 10 Dec 2019 16:34:29 +0100
Source: vala
Binary: libvala-0.46-0 libvala-0.46-0-dbgsym libvala-0.46-dev
libvalacodegen-0.46-0 libvalacodegen-0.46-0-dbgsym libvaladoc-0.46-0
libvaladoc-0.46-0-dbgsym libvaladoc-0.46-data libvaladoc-0.46-dev vala-0.46-doc
valac valac-0.46-vapi valac-bin valac-bin-dbgsym valac-dbgsym valadoc
valadoc-dbgsym
Architecture: source amd64 all
Version: 0.46.5-1.1
Distribution: experimental
Urgency: medium
Maintainer: Debian GNOME Maintainers
<[email protected]>
Changed-By: Helmut Grohne <[email protected]>
Description:
libvala-0.46-0 - C# like language for the GObject system - library
libvala-0.46-dev - C# like language for the GObject system - development
headers
libvalacodegen-0.46-0 - internal package for C# like language for the GObject
system
libvaladoc-0.46-0 - API documentation generator for vala (library)
libvaladoc-0.46-data - API documentation generator for vala (data)
libvaladoc-0.46-dev - API documentation generator for vala (devel files)
vala-0.46-doc - C# like language for the GObject system - documentation
valac - C# like language for the GObject system
valac-0.46-vapi - C# like language for the GObject system - vapi files
valac-bin - internal package for C# like language for the GObject system
valadoc - API documentation generator for vala
Closes: 889925
Changes:
vala (0.46.5-1.1) experimental; urgency=medium
.
* Non-maintainer upload.
* Move valac to a M-A:foreign package and add cross wrappers. (Closes:
#889925)
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