general questions about sysroot in building a toolchain

[Maxim Osipov]

You have all your libraries and headers in sysroot. Gcc and ld will use 
it when building your programs.

Maxim

Robert P. J. Day wrote:
> On Thu, 29 Sep 2005, Leon Woestenberg wrote:
> 
> 
>>Robert,
>>
>>Robert P. J. Day wrote:
>>
>>
>>> (is there an online tutorial about the purpose and use of sysroot in
>>>building a toolchain somewhere?)
>>>
>>
>>Beware of what you ask. Some use a chroot() environment for the toolchain
>>itself (to be vert
>>independent from the host tools/environment). And there is the sysroot style
>>where you prepare a
>>target root filesystem on the host.
>>
>>See these threads for a recent answer of the rationale of the last technique:
>>
>>http://www.diy-linux.org/pipermail/diy-linux-dev/2005-September/thread.html
>>
>>http://www.embeddedtux.org/pipermail/etux/2005-July/001080.html
> 
> 
> let me ask a simpler question regarding this whole sysroot thing,
> then. what is the advantage in selecting a USE_SYSROOT build when
> running crosstool?  what do i get out of it?
> 
> from what i can see in the results directory, the created sys-root/
> directory contains the following top-level directories:
> 
>   sys-root/
>     etc/
>     lib/
>     usr/
> 
> so ... as i read it, the contents of that directory represents a
> *partial*, chroot-style, root filesystem for the target system.  but i
> have no interest in that aspect.  i want my crosstool build to just
> build a toolchain -- i don't care about any bonus results like a
> partial root filesystem (yet).
> 
> so the questions remains -- if i use a sysroot approach in building my
> toolchain, do i have any need for that sys-root directory afterwards?
> is it necessary for the *use* of the toolchain once it's been built?
> 
> rday
> 
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> 

-- 
Maxim Osipov
OOO Siemens, CT, Embedded Linux
Tel.: +7 (812) 324 8379

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