[FFmpeg-user] ffmpeg built static, yet "libopenjp2.so.7: cannot open shared object file"

[Reindl Harald]

Am 14.08.2017 um 16:56 schrieb Carl Eugen Hoyos:
> 2017-08-14 16:49 GMT+02:00 Reindl Harald <h.reindl at thelounge.net>:
>>
>>
>> Am 14.08.2017 um 16:41 schrieb Carl Eugen Hoyos:
>>>
>>> 2017-08-14 13:51 GMT+02:00 Carl Eugen Hoyos <ceffmpeg at gmail.com>:
>>>>
>>>> 2017-08-14 11:04 GMT+02:00 Reindl Harald <h.reindl at thelounge.net>:
>>>>>
>>>>> frankly without -ffat-lto-objects libx264 and/or the comibnation of
>>>>> static
>>>>> libx264 and static ffmpeg just don't build
>>>>
>>>> The option should not be needed if your toolchain correctly supports
>>>> lto (and it is not needed here). Is it possible that you have to add it
>>>> because your build is not really an lto build (since something in your
>>>> toolchain - like ar - destroys the lto information but thanks to this
>>>> option,
>>>> compilation succeeds)?
>>>
>>> I can confirm that the reason you "need" -ffat-lto-objects is that you
>>> are not actually building with lto.
>>>
>>> The sad thing is that the optimized h264 cabac reader cannot be
>>> compiled with (static) lto. I don't remember the details atm but I
>>> suspect you have to disable this optimization in the source code to
>>> use lto, it may be better performance-wise to not use lto at all
>>> (depending on your exact needs).
>>>
>>> This bug cannot be worked around with -ffat-lto-objects (you would
>>> see the same issue I do if you would actually compile with lto)
>>
>> well, then i still guess other parts off mpeg can be still lto-optimized
>> and only x264 isn't
> 
> Nothing above was related to x264 but to the hevc and the h264 decoder.
> 
> The work-around for the cabac issue is using --enable-pic, I am not
> sure if this has negative effects (speed-wise), a performance test
> would be necessary

as you can see in the rpm spec (relevant part quoted again below) this 
is alreayd enabled and that's in fact part of the hardening stuff

%build 
 

mkdir generic 
 

pushd generic 
 

../configure \ 
 

  --prefix=%{_prefix}/local \ 
 

  --bindir=%{_prefix}/local/bin \ 
 

  --mandir=%{_prefix}/local/man \ 
 

  --extra-cflags="-I%{_prefix}/local/x264 %{optflags} -Ofast -ffast-math 
-funsafe-math-optimizations -Wno-pointer-sign -minline-all-stringops 
-fno-strict-aliasing -flto -fno-fat-lto-objects -fuse-ld=gold 
-fuse-linker-plugin -Wa,--noexecstack" \ 
 

  --extra-ldflags="-I%{_prefix}/local/x264 -L%{_prefix}/local/x264 -ldl 
-Wl,--as-needed -Wl,-z,now -Wl,-z,relro -Wl,-z,noexecstack %{optflags} 
-Ofast -ffast-math -funsafe-math-optimizations -Wno-pointer-sign 
-minline-all-stringops -fno-strict-aliasing -flto -fno-fat-lto-objects 
-pie -fPIE -fuse-ld=gold -fuse-linker-plugin -Wa,--noexecstack" \
  --enable-lto \
  --ar=gcc-ar \
  --ranlib=true \
  --enable-nonfree \
  --enable-gpl \
  --enable-pic \
  --enable-version3 \
  --enable-libmp3lame \
  --enable-libtheora \
  --enable-libx264 \
  --enable-libx265 \
  --enable-libvpx \
  --enable-openssl \
  --enable-static \
  --enable-runtime-cpudetect \
  --disable-amd3dnow \
  --disable-amd3dnowext \
  --disable-avdevice \
  --disable-debug \
  --disable-devices \
  --disable-ffplay \
  --disable-ffprobe \
  --disable-ffserver \
  --disable-htmlpages \
  --disable-hwaccels \
  --disable-iconv \
  --disable-libdc1394 \
  --disable-libfreetype \
  --disable-libgsm \
  --disable-libopencore-amrnb \
  --disable-libopencore-amrwb \
  --disable-libopencv \
  --disable-libopenjpeg \
  --disable-libopus \
  --disable-librtmp \
  --disable-libschroedinger \
  --disable-libspeex \
  --disable-libvorbis \
  --disable-libxvid \
  --disable-podpages \
  --disable-postproc \
  --disable-protocol=gopher \
  --disable-shared \
  --disable-txtpages