wasm-ld: error: unknown file type: src/.libs/mecab.bc

emcc -v
emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 3.1.45 (ef3e4e3b044de98e1811546e0bc605c65d3412f4)
clang version 18.0.0 (https://github.com/llvm/llvm-project d1e685df45dc5944b43d2547d0138cd4a3ee4efe)
Target: wasm32-unknown-emscripten
Thread model: posix
InstalledDir: /mnt/c/Users/16515/Desktop/prj/emsdk/emsdk/upstream/bin

I'm inside WSL2 Ubuntu 22.04 following this tutorial
https://github.com/Birch-san/mecab/tree/master/mecab-web

em++ \
src/.libs/mecab.bc \
src/.libs/libmecab.so \
-o ../mecab-web/mecab.html \
-s EXPORTED_FUNCTIONS="[
'_mecab_do2',
'_mecab_model_new2',
'_mecab_model_destroy',
'_mecab_strerror',
'_mecab_model_new_tagger',
'_mecab_destroy',
'_mecab_nbest_sparse_tostr',
'_mecab_sparse_tostr'
]" \
-s MODULARIZE=1 \
-s EXPORT_ES6=1 \
-s EXTRA_EXPORTED_RUNTIME_METHODS='[
"cwrap",
"addOnExit",
"FS"
]' \
--no-heap-copy \
-s ALLOW_MEMORY_GROWTH=1 \
--preload-file ../mecab-naist-jdic/dist@naist-jdic/

Gives "wasm-ld: error: unknown file type: src/.libs/mecab.bc"