w3m / boehm-gc issue (really is getcontext in x86_64)
news at morphism.de
Fri Jul 30 02:10:25 PDT 2010
On 2010-07-06, Matthew Dillon <dillon at apollo.backplane.com> wrote:
>:I started using dragonfly not too long ago. I wanted to build w3m from
>:pkgsrc on x86_64. Configure failed in a check for libgc, which is installed.
>:I found out that libgc uses getcontext (and assumes it to exist) which it
>:doesn't on x86_64 dragonfly.
>:To fix boehm-gc + w3m, I just inserted a defined(__DragonFly__) into mach_deps.c
>:Would it be a good idea to port the i386 version of getcontext into x86_64? I
>:am willing to do that, then.
> Yes, it would be a good idea! I didn't even realize that we did not
> have a getcontext() implementation for x86_64 in libc. It looks
> fairly straight-forward if you are familiar with x86_64 argument
> passing. If you have questions you can ask them here or on irc.
Just to keep everyone updated on the matter: It took me longer than expected
to get it working (mainly due to the fact that I am running dfly in a VM at
the time which does not do make quickworld very quickly.)
I think I have a working getcontext now, I will implement setcontext as
well and then submit a patch. I would then appreciate testing and someone
to look at it whether there is nothing massively broken (I believe get_mcontext
was broken as well).
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