On 2018-02-04 15:03, tu...@posteo.de wrote:

> I still have the problem of failed builds due to an
> 'undefined reference to `__alloca''. I recompiled 
> gcc/glibc and I am using linux-4.15.1 (from kernel.org)
> with linux-headers 4.15. .
> Affected are (at least) cdrdao and kbuild.


> I am using gcc (Gentoo 7.3.0 p1.0) 7.3.0. I recompiled glibc.
> I did https://wiki.gentoo.org/wiki/Upgrading_GCC
> What can cause this problem and how can I fix it?

To make progress against this, you'll have to look at the build logs, or
let others look at them.

Before doing that, I would try to build the affected packages outside of
portage, saving the output of "configure" and "make".  If you also see
the problem that way, try with the stable gcc and compare logs.

BTW alloca() is a very peculiar way of allocating memory and only a few
packages use it, fortunately.

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