And if I follow this guide:
https://github.com/AviSynth/AviSynth...ting/posix.rst, up to test installation with Version(), I get just this:
[info] ffplay version N-101739-gcad3a5d715 Copyright (c) 2003-2021 the FFmpeg developers
[info] built with gcc 10.2.0 (GCC)
[info] configuration: --enable-gpl --enable-version3 --disable-doc --disable-debug --enable-pic --enable-avisynth --cc=cc
[info] libavutil 56. 72.100 / 56. 72.100
[info] libavcodec 58.135.100 / 58.135.100
[info] libavformat 58. 77.100 / 58. 77.100
[info] libavdevice 58. 14.100 / 58. 14.100
[info] libavfilter 7.111.100 / 7.111.100
[info] libswscale 5. 10.100 / 5. 10.100
[info] libswresample 3. 10.100 / 3. 10.100
[info] libpostproc 55. 10.100 / 55. 10.100
[verbose] Initialized opengl renderer.
[NULL @ 0x7f9b14000c80] [debug] Opening 'test.avs' for reading
[file @ 0x7f9b14001980] [debug] Setting default whitelist 'file,crypto,data'
[avisynth @ 0x7f9b14000c80] [debug] Format avisynth probed with size=2048 and score=50
[AVIOContext @ 0x7f9b14009dc0] [verbose] Statistics: 11 bytes read, 0 seeks
[error] test.avs: Unknown error occurred
I don't think any AddAutoLoadDir() is needed for just Version(), right?
So I went back to previous ../configure options. I think we didn't get something right in ffmpeg configure...