Re: [gentoo-portage-dev] [PATCH] config.environ: delay export of A and AA (bug 720180)

[Ulrich Mueller]

>>>>> On Tue, 26 May 2020, Zac Medico wrote:

> On 5/26/20 12:48 AM, Michał Górny wrote:
>> On Mon, 2020-05-25 at 21:31 -0700, Zac Medico wrote:
>>> Since variables like A and AA can contain extremely large values which
>>> may trigger E2BIG errors during attempts to execute subprocesses, delay
>>> export until the last moment, and unexport when appropriate.
>>
>> Please don't.  This will only hide the problem from developers who will
>> unknowingly commit broken ebuilds and cause users of alternative package
>> managers to suffer.

> We've seen in https://bugs.gentoo.org/719202 that developers can already
> do that with existing versions of portage, since the failure can be
> dependent on USE configuration.

We have seen in bug 719202 that A has exceeded _SC_ARG_MAX which is
128 KiB.

However, your commit message mentions E2BIG which will trigger at a much
larger value, namely 2 MiB. We are far away from reaching that limit in
any ebuild.

These are separate issues (although related), so I think we should make
it very clear about which one we're talking.

Ulrich