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contrib: ffmpeg: change rules.mak optflags to -O0

Closed contrib: ffmpeg: change rules.mak optflags to -O0
umxprime/vlc:umxprime/4.x/contrib/ffmpeg/cahnge-build-rules-debug-opt-flag/mr into master
Closed Maxime Chapelet requested to merge umxprime/vlc:umxprime/4.x/contrib/ffmpeg/cahnge-build-rules-debug-opt-flag/mr into master
  1. Jan 24, 2025
    • Maxime Chapelet's avatar
      contrib: ffmpeg: change rules.mak optflags to -O0 · 32323720
      Maxime Chapelet authored 
      Given one try to debug ffmpeg contrib in lldb, when
`--disable-optim` option is used on bootstrap, then `-Og` flag
was added to compiler flags.

With `-Og` many stack frames were broken (unavailable variables or
unexpected program pointer jumps when stepping through code)

Using `-O0` instead seems to fix the issue to provide proper
stack frame access in lldb.
      32323720

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