Re: bdw-gc includes in libguile.h

[ludo@gnu.org (Ludovic Courtès)]

Hello,

Andy Wingo <wingo@pobox.com> writes:

> On Mon 28 Mar 2011 21:22, ludo@gnu.org (Ludovic Courtès) writes:
>
>> The problem is that libgc ends up being initialized behind our back upon
>> the first libgc-redirected ‘pthread_create’ call.
>
> Indeed.
>
>> Hans Boehm suggested [0] two solutions:
>>
>>   1. Disable pthread redirects and instead register threads explicitly
>>      (in ‘scm_with_guile’).
>>
>>   2. Initialize libgc in a constructor.
>>
>> I was leaning towards (2), because this way we’d be in control, and in
>> particular we’d have GC_all_interior_pointers = 0.  It would only work
>> on GCC/ELF platforms, and only if libgc wasn’t already initialized (for
>> instance if Guile is used in an application that already uses libgc on
>> its own)—but that really covers 90% of our use cases.
>>
>> I understand you’re in favor of (1).  This would give the same behavior
>> as in 1.8[*] while being less hackish than (2).  However, it’s only
>> applicable to 2.1.
>
> Why is this only applicable to 2.1 ?

I was thinking it’d break the ABI, but maybe not?

Ludo’.