Re: CT_TARGET

["Yann E. MORIN" <yann dot morin dot 1998 at anciens dot enib dot fr>]

Samson, All,

On Saturday 09 October 2010 09:14:57 Samson Luk wrote:
> Thanks for the clarification... so can I asume even if I have:
> CT_PREFIX_DIR="/opt/x-tools/${CT_TARGET}"
> in .config, crosstool-NG will provide the tuple even if I don't have
> $CT_TARGET setup in the shell?

Yes. Correct. But more important: crosstool-NG *will* provide its own
value for CT_TARGET, *even* if it was previously set.

> What happened if I use something other than the tuple in the first
> place for $CT_TARGET during the initial 'ct-ng menuconfig'?

Two fold:
- if you provide your own CT_TARGET, it is ignored by crosstool-NG, which
  computes the correct value internally;
- if you set CT_PREFIX_DIR to something that does *not* contain CT_TARGET,
  then it will be used as-is.

Eg. you can want to install your toolchain in: /opt/my-toolchain, and
because you will only ever work with this one, so you do not need to
differentiate it from other toolchains.

Rule of thumb: variables starting with CT_ are internal crosstool-NG
variables, and crosstool-NG ignores the initial values of such variables.
;-)

Regards,
Yann E. MORIN.

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