[Buildroot] (How-to properly use) external toolchain?

[Buildroot] (How-to properly use) external toolchain?

[Piotr Adam Zolnierczuk]

Hi,
I could not find answer in a FAQ nor in the mailing list archives, so I 
am posting the question

Problem:
I am not sure I understand the meaning of
BR2_TOOLCHAIN_EXTERNAL_LIB_C and BR2_TOOLCHAIN_EXTERNAL_LIBS config 
parameters

Synopsis:
Here's what I did
1. Got buildroot (revision 17875) and succesfully build toolchain only 
(gcc-4.1.1, binutils-2-17 and gdb-6.5, uClib latest snapshot) and 
installed it to /opt/arm directory (by setting 
BR2_STAGING_DIR="/opt/arm"). All target options were disabled.
2. Using the above I was able to compile linux kernel that works on my 
board (it happens to be at91sam9260ek, but that is I hope irrelevant)
3. Now I unpack buildroot to a separate directory and configure it to 
use my /opt/arm external toolchain. All works fine except that I have to 
manually copy several libs from /opt/arm/lib to 
(...)/buildroot/build_arm/root/lib. I tried several different 
BR2_TOOLCHAIN_EXTERNAL_LIB_C and BR2_TOOLCHAIN_EXTERNAL_LIBS but they 
seem to be simply ignored

Q: Any ideas as to what am I doing wrong?

Thanks

Piotr




-- 
 ________________________________________________________________
 Piotr Adam Zolnierczuk
 Indiana University                        phone:  (812) 855-3613
 Cyclotron Facility                        fax:    (812) 855-6645
 2401 Milo B Sampson Ln             e-mail:  pzolnier at indiana.edu
 Bloomington,IN 47408, USA    http://www.iucf.indiana.edu/~zolnie
 ________________________________________________________________
                   written on recycled electrons                 	


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[Buildroot] (How-to properly use) external toolchain?

[MikeW]

Piotr Adam Zolnierczuk <pzolnier@...> writes:

> 
> Hi,
> I could not find answer in a FAQ nor in the mailing list archives, so I 
> am posting the question
>
> Q: Any ideas as to what am I doing wrong?
> 
> Thanks
> 
> Piotr
> 

Thanks to the creator of the external toolchain option.
But I also have a difficulty.
I have set up the toolchain path and prefix, but there were problems finding
(kernel header?) files such as linux/param.h, since they aren't inside the
toolchain path.
I presume another include path needs setting up somewhere ... or a symlink ?

Regards,
Mike