Am 12.09.23 um 07:19 schrieb Peng Gao:
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
you talk about linker errors but only set compiler flags
cat /rpmbuild/SPECS/ffmpeg.spec | grep -i pic
--extra-cflags="%{optflags} %{O3_flags} -fPIC -flto=%{?_smp_tasks} -w" \
--extra-ldflags="-Wl,--as-needed -Wl,-z,now -Wl,-z,relro
-Wl,-z,noexecstack %{optflags} %{O3_flags} -fPIC -flto=%{?_smp_tasks} -w" \
--enable-pic \
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