Cython version 0.29.33
x86_64-pc-linux-gnu-gcc: warning: ‘-x c++’ after last input file has no effect
cc1plus: warning: command-line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++
cc1plus: warning: command-line option ‘-std=gnu17’ is valid for C/ObjC but not for C++
x86_64-pc-linux-gnu-gcc: warning: ‘-x c++’ after last input file has no effect
cc1plus: warning: command-line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++
cc1plus: warning: command-line option ‘-std=gnu17’ is valid for C/ObjC but not for C++
warning: build_py: byte-compiling is disabled, skipping.

warning: install_lib: byte-compiling is disabled, skipping.

warning: no files found matching 'plyvel/*.pxi'