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Re: Cross-toolchains for Jessie available

On Saturday 29. November 2014 01.50.30 Wookey wrote:
> After a long period of brokenness, cross-toolchains for debian are back.
> We dropped the ball rather over Wheezy as we expected new
> multiarch-built cross-toolchains to be ready much sooner than this so
> failed to take care of wheezy properly which has been a pain for a lot
> of people. Sorry about that.
> However there are now some working cross-toolchains again, in time for
> Jessie. These did not make it into Jessie proper, due to
> infrastructure changes which are needed for packages with cross-arch
> dependencies, but the deadline did provide the impetus to get it all
> working.
> These are essentially the same packages that have been available from
> secretsauce.net for much of 2014, but covering more architectures.

Thanks for doing this! I see that i386 is now provided for those of us still 
using older hardware.


> The same cross-toolchains are also available in unstable, but are not
> always installable due to multiarch skew (after a new gcc, libc or
> linux upload). And they have caused some controversy so expect changes
> and instability. Also mips is currently broken as the native compiler
> didn't build in the current upload.

What is the status here? I see that only amd64 packages are available, which 
is fairly unusual for Debian where the aim is usually to support all available 

With this in mind, I decided to try and build the cross-gcc-4.9-mipsel source 
package with pbuilder, having installed the build prerequisites. I had to 
manually add the foreign architecture within the pbuilder chroot in order to 
satisfy dependencies:

sudo /usr/sbin/pbuilder --login --save-after-login
dpkg --add-architecture mipsel
apt-get update

Otherwise, various :mipsel dependencies cannot be resolved and you get strange 
suggestions. Here's one example:

Package libc6-dev:mipsel is not available, but is referred to by another 
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  libc6-dev-amd64 libc-dev-bin

If there's a proper way of doing this multi-arch setup with pbuilder, it would 
be useful to know.

Fortunately, the build process completed successfully, suggesting that there 
is nothing (at the moment of writing) *technically* preventing the toolchain 
from being built for at least i386 in unstable, and hopefully for other 
architectures too.

I'll press on with the unstable toolchains, since they are presumably the 
future of cross-building on Debian. However, thanks again for making packages 
available for jessie and for i386, and thanks to those who got the toolchains 
ready for unstable, too!


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