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Ubuntu 12.04.4 LTS MultiArch (i386 <<-> > ARM Hard float)
We will learn about configure & amp; install multi-arch packages in our host machine Ubuntu 12.04.4 LTS.This is required when we wish cross compile software using our host machine under Ubuntu/debian environment.
= Overview =
What we learn? Configure our environment and install cross packages in Ubuntu, after install the packages we will cross compile programs using our ubuntu host.
__TOC__
= Host Enviroment =
This how to is done using 12.04.4 LTS (32 bits) in your host, you can download it from our server using this [http://downloads.isee.biz/pub/igepv5_ce/devel/iso/ubuntu-12.04.4-desktop-i386.iso link] or directly from Ubuntu (Canonical) website. You can install it in a Virtual Machine enviroment using any Virtualization software or directly in your PC.
== Host Configuration ==We will modify dpkg & apt for use a multi arch environment but what extacly is a multi arch environment?
The first step is add the multi arch option in dpkg. Go to /etc/dpkg/dpkg.cfg.d and if the directory is empty you must create one file named: multi archand inside the file we will put this line:foreign-architecture armhf So this is the result: <pre>pwd /etc/dpkg/dpkg.cfg.d ls -al mcaro@mcaro-vm-u12:/etc/dpkg/dpkg.cfg.d$ ls -altotal 12drwxr-xr-x 2 root root 4096 May 8 10:25 .drwxr-xr-x 4 root root 4096 May 8 09:43 ..-rw-r--r-- 1 root root 27 May 8 10:25 multiarch mcaro@mcaro-vm-u12:/etc/dpkg/dpkg.cfg.d$ cat multiarch
foreign-architecture armhf
</pre><div>Now we're ready for modify the apt repo sources for our wished new architecture, you should edit the file /etc/apt/sources.list and change the repositories as (I left here a sources.list sample file)</div><pre># deb cdrom:[Ubuntu 12.04.4 LTS _Precise Pangolin_ - Release i386 (20140204)]/ precise main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb [arch=i386] http://us.archive.ubuntu.com/ubuntu/ precise main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ precise main restricted
deb [arch=armel,armhf] http://ports.ubuntu.com/ubuntu-ports precise main universe
## Major bug fix updates produced after the final release of the
## distribution.
deb [arch=i386] http://us.archive.ubuntu.com/ubuntu/ precise-updates main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ precise-updates main restricted
deb [arch=armel,armhf] http://ports.ubuntu.com/ubuntu-ports precise-updates main restricted
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb [arch=i386] http://us.archive.ubuntu.com/ubuntu/ precise universe
deb-src http://us.archive.ubuntu.com/ubuntu/ precise universe
deb [arch=i386] http://us.archive.ubuntu.com/ubuntu/ precise-updates universe
deb-src http://us.archive.ubuntu.com/ubuntu/ precise-updates universe
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb [arch=i386] http://us.archive.ubuntu.com/ubuntu/ precise multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ precise multiverse
deb [arch=i386] http://us.archive.ubuntu.com/ubuntu/ precise-updates multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ precise-updates multiverse
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb [arch=i386] http://us.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
deb [arch=i386] http://us.archive.ubuntu.com/ubuntu/ precise-security main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ precise-security main restricted
deb [arch=i386] http://us.archive.ubuntu.com/ubuntu/ precise-security universe
deb-src http://us.archive.ubuntu.com/ubuntu/ precise-security universe
deb [arch=i386] http://us.archive.ubuntu.com/ubuntu/ precise-security multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ precise-security multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
deb [arch=i386] http://archive.canonical.com/ubuntu precise partner
deb-src http://archive.canonical.com/ubuntu precise partner
## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb [arch=i386] http://extras.ubuntu.com/ubuntu precise main
deb-src http://extras.ubuntu.com/ubuntu precise main
