[FFmpeg-trac] #4474(build system:open): Some inline asm code does not compile on Haiku 32-bit with GCC 4

[FFmpeg]

#4474: Some inline asm code does not compile on Haiku 32-bit with GCC 4
-------------------------------------+-------------------------------------
             Reporter:  Timothy_Gu   |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:  build
              Version:  git-master   |  system
             Keywords:  haiku        |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Changes (by michael):

 * cc: michael (added)
 * status:  new => open


Comment:

 You could disable the functions which fail to build on haiku with some #if
 !HAIKU, iam not sure how to detect haiku ...
 or something like this could be added:
 {{{
 --- a/configure
 +++ b/configure
 @@ -5622,6 +5622,7 @@ enabled threads && ! enabled pthreads && ! enabled
 atomics_native && die "non pt
  if test $target_os = "haiku"; then
      disable memalign
      disable posix_memalign
 +    disable ebp_available # gcc 4.8.4 (2014_12_21) on haiku at least
 fails if ebp is used
  fi

  enabled_all d3d11va d3d11_cobj CoTaskMemFree &&
 }}}
 I can apply this but i suspect the problem is between the compiler and the
 individual functions and its more a coincidence that ebp_available = 0
 catches all

 the {{{"g" (-mmx_len)}}} looks suspicous as a potential cause, the
 compiler here must be capable to put the intermediate negated variable in
 memory to avoid the need for another register

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Ticket URL: <https://trac.ffmpeg.org/ticket/4474#comment:11>
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