[FFmpeg-trac] #6578(undetermined:new): ARM NEON detection should use getauxval instead of parsing files in /proc

[FFmpeg]

#6578: ARM NEON detection should use getauxval instead of parsing files in /proc
-------------------------------------+-------------------------------------
             Reporter:  James        |                    Owner:  (none)
  Cowgill                            |
                 Type:  enhancement  |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Comment (by Aman):

 somewhat related, I experienced SEGV on some android/arm devices when
 attempting to read /proc/self/auxv

 {{{
 OS Version: Android 9 (PS7242)
 Report Version: 104

 Exception Type: Unknown (SIGSEGV)

 Application Specific Information:
 Segfault

 Thread 0 Crashed:
 0   libc.so                         0xf23ac550          fread
 1   libavutil.so                    0xd585c3ca          [inlined]
 get_hwcap (cpu.c:60)
 2   libavutil.so                    0xd585c3ca
 ff_get_cpu_flags_arm (cpu.c:109)
 }}}

 it appears since API20 getauxval() is part of android libc

 https://chromium.googlesource.com/skia/+/chrome/m49/platform_tools/android/third_party/cpufeatures
 /cpu-features.c#478
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/6578#comment:1>
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