Difference between revisions of "NeTV local compilation"

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(Preparing the device)
 
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==Compatibility==
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This documentation is verified at version 12 firmware.
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NeTV includes the abilities to download packages that are pre-compiled from the chumby release servers.  
 
NeTV includes the abilities to download packages that are pre-compiled from the chumby release servers.  
  
 
To do local development, you will use this facility to install gcc.  
 
To do local development, you will use this facility to install gcc.  
  
WARNING -- DO NOT USE THIS PROCEDURE IT HAS NOT BEEN COMPLETELY DEBUGGED. In particular, if the device runs out of space during tool installation you can brick the device. Currently trying to figure out a more robust method for installing the very large package of tools required for development.
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==Preparing the device==
 
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==Getting the compiler installed==
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First, connect to the network using the NeTV UI. Once you are connected to the network, ssh into the device.  
 
First, connect to the network using the NeTV UI. Once you are connected to the network, ssh into the device.  
  
Now, type the command
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Then, execute this series of commands to create a unionfs that unlocks the free space on the microSD card:
  
opkg update
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  mkdir /tmp/roroot
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  mount / /tmp/roroot -o bind
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  mkdir /tmp/unionroot
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  mkdir /media/storage/newroot
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  mount -w -t unionfs -o dirs=/media/storage/newroot=rw:/tmp/roroot=ro unionfs /tmp/unionroot
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  mount /var/volatile /tmp/unionroot/var/volatile -o bind
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  chroot /tmp/unionroot /bin/bash
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  mount -a
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  mkdir /dev/pts
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  mkdir /dev/shm
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  mount devpts /dev/pts -t devpts
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  mount tmpfs /dev/shm -t tmpfs -o rw,mode=777
  
This will update the list of installable packages.
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Finally, download and install the package to the new unionfs root:
  
Before going on, you will need to change / to be writeable. This is done by using
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  opkg update
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  opkg install task-sdk-native
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  opkg install libgcc-dev
  
mount -o remount,rw /
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This process will download all of the files, headers, and executables required to do C development. It takes a while, maybe a half hour or so. It's recommended to kill the NeTVBrowser and NeTVServer before running this to free up RAM.
 
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In order to install gcc, you will need to first remove some packages to make space. If you aren't planning on using python, that's an easy to remove and fairly large package. You can remove it by doing
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opkg remove python-core --force-removal-of-dependent-packages
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If you do want to retain python, have a look at the list of installed packages using "opkg list-installed" and pick packages that you don't need.
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Once you have freed up about 250 MB, you can run
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opkg install task-sdk-native
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This process will download all of the files, headers, and executables required to do C development.
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Once this process is done, you can now use gcc:
 
Once this process is done, you can now use gcc:
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  gcc -o hello hello.c
 
  gcc -o hello hello.c
 
  ./hello
 
  ./hello
  hello world!
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  Hello, world!
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The total space consumed by the toolchain is currently around 380 MB.
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'''Important note''': every time the device is rebooted, you need to re-do the unionfs. You do not need to re-install the toolchain, as it is already there, but you do need to chroot into the unionroot.

Latest revision as of 20:20, 3 October 2011

Compatibility

This documentation is verified at version 12 firmware.

NeTV includes the abilities to download packages that are pre-compiled from the chumby release servers.

To do local development, you will use this facility to install gcc.

Preparing the device

First, connect to the network using the NeTV UI. Once you are connected to the network, ssh into the device.

Then, execute this series of commands to create a unionfs that unlocks the free space on the microSD card:

 mkdir /tmp/roroot
 mount / /tmp/roroot -o bind 
 mkdir /tmp/unionroot
 mkdir /media/storage/newroot
 mount -w -t unionfs -o dirs=/media/storage/newroot=rw:/tmp/roroot=ro unionfs /tmp/unionroot 
 mount /var/volatile /tmp/unionroot/var/volatile -o bind
 chroot /tmp/unionroot /bin/bash
 mount -a
 mkdir /dev/pts
 mkdir /dev/shm
 mount devpts /dev/pts -t devpts
 mount tmpfs /dev/shm -t tmpfs -o rw,mode=777

Finally, download and install the package to the new unionfs root:

 opkg update
 opkg install task-sdk-native
 opkg install libgcc-dev

This process will download all of the files, headers, and executables required to do C development. It takes a while, maybe a half hour or so. It's recommended to kill the NeTVBrowser and NeTVServer before running this to free up RAM.

Once this process is done, you can now use gcc:

gcc -o hello hello.c
./hello
Hello, world!

The total space consumed by the toolchain is currently around 380 MB.

Important note: every time the device is rebooted, you need to re-do the unionfs. You do not need to re-install the toolchain, as it is already there, but you do need to chroot into the unionroot.