FATE

Unknown option "--enable-libcelt".
See /home/fate/ffmpeg/configure --help for available options.

Unknown option "--enable-libcelt".
See /home/fate/ffmpeg/configure --help for available options.

i686-pc-msdosdjgpp-gcc is unable to create an executable file.
C compiler test failed.

If you think configure made a mistake, make sure you are using the latest
version from Git.  If the latest version fails, report the problem to the
ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.libera.chat.
Include the log file "ffbuild/config.log" produced by configure as this will help
solve the problem.

        h264_qpel mf8, mf4
        ^
<instantiation>:150:29: warning: use of vtype encodings with SEW > 8 and LMUL == mf4 may not be compatible with all RVV implementations
        vsetvli zero, zero, e16, mf4, ta, ma
                            ^
<instantiation>:4:9: note: while in macro instantiation
        qpel_lowpass avg, _l2, mf8, mf4
        ^
src/libavcodec/riscv/h264qpel_rvv.S:335:9: note: while in macro instantiation
        h264_qpel mf8, mf4
        ^
<instantiation>:170:33: warning: use of vtype encodings with LMUL < SEWMIN/ELEN == mf4 is reserved
        vsetvli zero, zero, e8, mf8, ta, ma
                                ^
<instantiation>:4:9: note: while in macro instantiation
        qpel_lowpass avg, _l2, mf8, mf4
        ^
src/libavcodec/riscv/h264qpel_rvv.S:335:9: note: while in macro instantiation
        h264_qpel mf8, mf4
        ^