Using linux OS, where can I find arm-elf

[onocentaur]

I've been playing with compiling from source and adding patches. It's not really working - I'm using Ubuntu linux and an ipod, so I need arm-elf-gcc, but I don't have it! Where can I download it?
And if I've horribly misunderstood things, please excuse me, I'm new to both linux and rockbox...  

[saratoga]

Check out the wiki:

http://www.rockbox.org/twiki/bin/view/Main/CrossCompiler

I recommend the automatic script.  It takes about 30 seconds to setup.  Just run it, and then add the bin directory it creates to your path.

[onocentaur]

I actually saw that when I was looking for info, after failing to make the 'simple guide...' work. I figured as step one mentioned something about arm-elf it would fail in the same way so I didn't try it!
But I'll give it a go now, thanks  

[onocentaur]

Okay, so I tried that. From in the tools folder I ran sudo ./rockboxdev.sh, and it did something. But when I try to make, it still fails the same way... no arm-elf-gcc. What have I done wrong?

 

[bluebrother]

have you re-run the configure script? Where did you install the compiler, and did you add the path to the PATH variable like the script tells? Have you made sure the changes take effect in your current session?

[onocentaur]

have you re-run the configure script?

yeah, I did that

Where did you install the compiler, and did you add the path to the PATH variable like the script tells?

I don't know where I installed the complier!   I just ran the command from within the tools folder in a terminal...
And I don't remember being told to add anything to any path variable

Have you made sure the changes take effect in your current session?

good grief, I don't even know what this mean. perhaps I should just stick with the standard build...

[lights0ut]

onocentaur, as a fellow ubuntu user, I can tell you that when you run the rockboxdev.sh script you do not have to type make. The process goes something like this

sudo ./rockboxdev.sh

then it should ask which target you are building for (it displays the choices too)
you are using an ipod, so your choice should be arm so type in:

a

then the script does the rest. It installs arm-elf-gcc in the directory

/usr/local/arm-elf

so you need to be able to give commands to this directory through the terminal. This is done by modifying your path. The very last thing the script does is tell you to add this next line to your PATH:

/usr/local/arm-elf/bin:

so, now you need to open a terminal and type

gedit .bash_profile  (or for kubuntu: kedit .bash_profile)

Inside this file there will be a section that says

PATH=blablablab :$PATH

copy the /usr/local/arm-elf/bin: (including the colon) and paste it between the : and the $. Save the file, then log out, and log back in to your PC and you should be good to go.
An easy way to check your path is to open a terminal and type

echo $PATH

the output from this command should have /usr/local/arm-elf/bin in there.

Hope this helps you out

[onocentaur]

That looks like just the kind of information I need, brilliant! I can't try it out till this evening, but your instructions look fool-proof, and I'll report back here on how it goes. Thankyou very much!  

[onocentaur]

So I have no .bash_profile. I eventually worked out that .profile will do, although I don't have any standard PATH stuff in it, just an if conditional to add a local bin/ if I've got one (I don't) so I just added PATH=/usr/local/arm-elf/bin:"$PATH" to the end of the file. This worked when I logged out and tried echo $PATH.
So it knows where to look now. Unfortunately rockboxdev.sh isn't even making /usr/local/arm-elf/bin! After getting the PATH thing to work, I tried to compile but I got the arm-elf missing error. So I thought I'd look myself, and it's not there! Running rockboxdev again I notice this error appears twice:

checking whether the C compiler (gcc  ) works... no
configure: error: installation or configuration problem: C compiler cannot create executables.

Which presumably is the issue. Now how do I fix that?  
gcc is definitely installed - I just checked synaptic. I'm using ubuntu 7.04 feisty, if that makes any difference. (I've only had it installed for a week!)

[lights0ut]

I suggest installing your desktop environment's software development kit, or dev package.

In KDE these are found in the apt repositories under the names:

kde-sdk   and     kde-devel

if you are on regular ubuntu (GNOME, not KDE) I'm sure that installing the above packages will still do the trick. I run both KDE and GNOME, and KDE was first so I am most familiar with it, I'm not sure of the specific GNOME packages, but I'm sure there are similar ones.

[onocentaur]

I installed gnome-devel this morning - couldn't find a gnome-sdk! - and set off rockboxdev. It's definitely done something... but I won't be able to test it till this evening.
Thanks again fro your continued help  

[linuxstb]

Just in case anyone reads this thread in the future, the "build-essential" package is the one you need to install.  

Installing your desktop environment's SDK will cause the relevant packages to be installed as well (due to dependencies), but it's not necessary.

[onocentaur]

Good work, chaps.
It's worked. I've now compiled Rockbox from source myself.  

Thank you so much for your assistance. No doubt I'll have more questions sooner or later!

[shak]

hey I am having trouble setting the path. I am using ubuntu 6.06 and gnome. whenever i set the path and type: echo $PATH , i get this :
shak@shak-desktop:~$ echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11:/usr/games

My  .bash_profile file looks like this:
# ~/.bash_profile: executed by bash(1) for login shells.
# see /usr/share/doc/bash/examples/startup-files for examples.
# the files are located in the bash-doc package.

# the default umask is set in /etc/login.defs
#umask 022

# include .bashrc if it exists
if [ -f ~/.bashrc ]; then
    . ~/.bashrc
fi

#set PATH so it includes user's private bin if it exists
if [ -d ~/bin ] ; then
    PATH=/usr/local/arm-elf/bin:/usr/local/arm-elf/bin:$PATH
fi
PATH=/usr/local/arm-elf/bin:"$PATH"


I have tried everything possible but with no success. When i go to /usr/local/arm-elf/bin everything is there! but for some reason it doesn't work. When i go to compile rockbox it says that arm-elf is not in your path!
Could anyone help me out with this? or give me a sample of their .bash_profile file?

[Llorean]

Try adding the path to your .bashrc file instead of your .bash_profile.