[Buildroot] uclibc config changes and cross-compiler

[Buildroot] uclibc config changes and cross-compiler

[Sergey Naumov]

Hello.

Does anybody know whether changes in uclibc.conf when cross-compiler
is already built can lead to unrunnable programs?
For example, we made a toolchain with certain uclibc features. Then we
decided to add/remove some programs from our build so we need
additional/no longer need some uclibc features. Is it safe to rebuild
only uclibc in this case, or we also have to rebuild compiler?

Thanks in advance,

Sergey Naumov.

[Buildroot] uclibc config changes and cross-compiler

[Thomas Petazzoni]

On Fri, 21 Jan 2011 10:46:48 +0300
Sergey Naumov <sknaumov@gmail.com> wrote:

> Does anybody know whether changes in uclibc.conf when cross-compiler
> is already built can lead to unrunnable programs?

I don't think there is an uclibc.conf file, but I assume you're talking
about uClibc .config file.

> For example, we made a toolchain with certain uclibc features. Then we
> decided to add/remove some programs from our build so we need
> additional/no longer need some uclibc features. Is it safe to rebuild
> only uclibc in this case, or we also have to rebuild compiler?

I am not an uClibc expert, but my understanding is that uClibc does not
provide ABI compatibility between versions and configurations.
Therefore, you cannot assume that programs compiled against version
A/configuration A of uClibc will work properly with version
B/configuration B of uClibc.

Regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com