[FFmpeg-user] No compiled with -fPIC for libavcodec/aarch64/vp9mc_16bpp_neon.S
Peng Gao
peng at multicorewareinc.com
Tue Sep 12 08:19:08 EEST 2023
Hi guys,
I compiled ffmpeg(4.3.1) with the following configuration on Linux:
./configure --prefix= ~/wk/install/ffmpeg --enable-pic --disable-ffplay
--disable-ffprobe --enable-static --enable-gpl
--enable-libx264 --extra-cflags="-fpic"
ffmpeg was compiled successfully.
There are some link errors when I compiled the OpenCV(4.6.0) With the
following configuration :
cmake .. -D WITH_OPENCL=ON -D WITH_FFMPEG=ON -D CMAKE_BUILD_TYPE=Release ,
following is the error:
/ffmpeg/lib/libavcodec.a(vp9mc_16bpp_neon.o): relocation
R_AARCH64_ADR_PREL_PG_HI21 against symbol `ff_vp9_subpel_filters' which may
bind externally can not be used when making a shared object; recompile with
-fPIC
/ffmpeg/lib/libavcodec.a(vp9mc_16bpp_neon.o): In function
`ff_vp9_avg_sharp4_v_12_neon':
libavcodec/aarch64/vp9mc_16bpp_neon.S:606:(.text+0x230c): dangerous
relocation: unsupported relocation.
It shows ffmpeg should be compiled with -fPIC, this is also enabled in the
configuration when compiling the ffmpeg , so I don't know why it is and I
try to get help from the community .
Thanks,
Jerry
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