On 11/24/21 22:57, Andres Freund wrote:
>
>> Which things does it break exactly?
> -Bsymbolic causes symbols that are defined and referenced within one shared
> library to use that definition. E.g. if a shared lib has a function
> "do_something()" and some of its code calls do_something(), you ca
Hi,
On 2021-11-24 17:55:03 -0500, Andrew Dunstan wrote:
> On 11/24/21 13:55, Andres Freund wrote:
> > On 2021-11-23 17:28:08 +0100, Peter Eisentraut wrote:
> >> On 22.11.21 23:32, Tom Lane wrote:
> The easier approach for this class of issues is to use the linker option
> -Bsymbolic.
> >
On 11/24/21 13:55, Andres Freund wrote:
> Hi,
>
> On 2021-11-23 17:28:08 +0100, Peter Eisentraut wrote:
>> On 22.11.21 23:32, Tom Lane wrote:
The easier approach for this class of issues is to use the linker option
-Bsymbolic.
>>> I don't recall details, but we've previously rejected th
Hi,
On 2021-11-23 17:28:08 +0100, Peter Eisentraut wrote:
> On 22.11.21 23:32, Tom Lane wrote:
> > > The easier approach for this class of issues is to use the linker option
> > > -Bsymbolic.
> > I don't recall details, but we've previously rejected the idea of
> > trying to use -Bsymbolic widely;
On 22.11.21 23:32, Tom Lane wrote:
The easier approach for this class of issues is to use the linker option
-Bsymbolic.
I don't recall details, but we've previously rejected the idea of
trying to use -Bsymbolic widely; apparently it has undesirable
side-effects on some platforms. See commit mes
Hi,
On 2021-11-22 20:13:28 -0500, Bruce Momjian wrote:
> On Mon, Nov 22, 2021 at 03:57:45PM -0800, Andres Freund wrote:
> > It does however change symbol binding, basically making all symbols bound
> > eagerly. Which I guess theoretically could be considered an ABI change,
> > because it removes t
On Mon, Nov 22, 2021 at 03:57:45PM -0800, Andres Freund wrote:
> It does however change symbol binding, basically making all symbols bound
> eagerly. Which I guess theoretically could be considered an ABI change,
> because it removes the ability to intercept symbols referenced in a previously
> loa
Hi,
On 2021-11-22 17:32:21 -0500, Tom Lane wrote:
> > The easier approach for this class of issues is to use the linker option
> > -Bsymbolic.
>
> I don't recall details, but we've previously rejected the idea of
> trying to use -Bsymbolic widely; apparently it has undesirable
> side-effects on s
Andres Freund writes:
> Basically they way we currently build our extensions, the compiler & linker
> assume every symbol inside the extension libraries needs to be interceptable
> by the main binary. Which means that all function calls to symbols visible
> outside the current translation unit nee
Hi,
There's two related, but somewhat different aspects to $subject.
TL;DR: We use use -fvisibility=hidden + explicit symbol visiblity,
-Wl,-Bdynamic, -fno-plt
1) Cross-translation-unit calls in extension library
A while ago I was looking at a profile of a workload that spent a good chunk
of t
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