Error compiling on Ubuntu Server 20.04

[ghost]

 cd PlotFS && cmake . && make && sudo make install
-- The C compiler identification is GNU 9.3.0
-- The CXX compiler identification is GNU 9.3.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.29.1") 
-- Found FUSE3: /usr/lib/x86_64-linux-gnu/libfuse3.so  
-- Configuring done
-- Generating done
-- Build files have been written to: /home/me/PlotFS
[ 16%] Generating plotfs_generated.h
error: /home/me/PlotFS/plotfs.fbs:17: 14: error: enum value does not fit [0; -1]
make[2]: *** [CMakeFiles/mount.plotfs.dir/build.make:62: plotfs_generated.h] Error 1
make[1]: *** [CMakeFiles/Makefile2:77: CMakeFiles/mount.plotfs.dir/all] Error 2
make: *** [Makefile:130: all] Error 2

Just trying this out of interest on new installation of Ubuntu Server 20.04. Probably something wrong my end but posting just in case it isn't.

[szatmary]

flatbuffers compiler of at least version 1.12 is required. Ubuntu 20.04 has 1.11. Install FlatBuffers from source.

[ghost]

Okay, thanks. Is this the correct source: https://github.com/google/flatbuffers?
Their readme doesn't say how to compile it. If you get a moment any chance you could add how to compile that to your readme? No problem if not.

[szatmary]

Updated readme.