buildroot

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==== Location of downloaded packages

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The various tarballs that are downloaded by Buildroot are all stored

in +BR2_DL_DIR+, which by default is the +dl+ directory. If you want

to keep a complete version of Buildroot which is known to be working

with the associated tarballs, you can make a copy of this directory.

This will allow you to regenerate the toolchain and the target

filesystem with exactly the same versions.

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If you maintain several Buildroot trees, it might be better to have a

shared download location. This can be achieved by pointing the

+BR2_DL_DIR+ environment variable to a directory. If this is

set, then the value of +BR2_DL_DIR+ in the Buildroot configuration is

overridden. The following line should be added to +<~/.bashrc>+.

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 export BR2_DL_DIR=<shared download location>

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The download location can also be set in the +.config+ file, with the

+BR2_DL_DIR+ option. Unlike most options in the .config file, this value

is overridden by the +BR2_DL_DIR+ environment variable.