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

[Andrew Randrianasulu]

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slightly outdated self made Slackware live usb.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)
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