[x264-devel] Possible problems with old nasm on Linux/i686?

[Henrik Gramner]

IIRC some older nasm versions had bugs that caused issues on certain
system configurations.

Not sure if it's worth looking into workarounds etc. if simply
upgrading to a newer version fixes things.

On Thu, Apr 10, 2025 at 1:02 AM Andrew Randrianasulu
<randrianasulu at gmail.com> wrote:
>
> I was playing with compiling cinelerra-gg (NLE I help to maintain) on slightly outdated self made Slackware live usb. Kernel is 64 bit but userspace is all 32bit.
>
> It used nasm 2.13 and while everything seemingly compiled fine x264 itself (both stable branch and master)  was segfaulting on encode start.
>
> After some hair splitting I updated nasm to 2.14.01 (still crash) and then to Slackware 15.0s 2.15.05 . Last update fixed x264 in itself and as part of ffmpeg/cingg.
>
> I wonder if this bug worth chasing down, considering I saw very truncated gdb backtrace on master, and some AVX prologue in stable? (host cpu does have AVX but not AVX2 - this is AMD FX 4300)