Built yosys.wasm is too large

[LSTM-Kirigaya]

Version

Yosys 0.48+5 (git sha1 7a362f1, clang++ 18.1.2-wasi-sdk -Oz)

On which OS did this happen?

Linux, WebAssembly

Reproduction Steps

Disable all the features in Makefile

# features (the more the better)
ENABLE_TCL := 0
ENABLE_ABC := 0
ENABLE_GLOB := 0
ENABLE_PLUGINS := 0
ENABLE_READLINE := 0
ENABLE_EDITLINE := 0
ENABLE_GHDL := 0
ENABLE_VERIFIC := 0
ENABLE_VERIFIC_SYSTEMVERILOG := 0
ENABLE_VERIFIC_VHDL := 0
ENABLE_VERIFIC_HIER_TREE := 0
ENABLE_VERIFIC_YOSYSHQ_EXTENSIONS := 0
ENABLE_VERIFIC_EDIF := 0
ENABLE_VERIFIC_LIBERTY := 0
ENABLE_COVER := 0
ENABLE_LIBYOSYS := 0
ENABLE_ZLIB := 0

...

# Needed for environments that can't run executables (i.e. emscripten, wasm)
DISABLE_SPAWN := 1
# Needed for environments that don't have proper thread support (i.e. emscripten, wasm--for now)
DISABLE_ABC_THREADS := 1

then run

make config-wasi
make -j 48
du yosys.wasm -h

output:

242M    yosys.wasm

The build wasm is too large (previous version of emcc build wasm is only 12MB)

btw, wasi sdk is wasi-sdk-24.0-x86_64-linux

Expected Behavior

Expect generated yosys.wasm with size of <20MB

Actual Behavior

Generated yosys.wasm with size of 242MB

[whitequark]

Do you happen to build with debug information? If you post the output of objdump -h that would help.