test.sh

#!/bin/sh

set -xe

ROOT=$PWD/build/output
CPPROOT=$ROOT/cpp
PYROOT=$ROOT/python

$(which wasmtime) -W threads=y -S threads=y --dir $PYROOT::/ \
  --env PYTHONPATH=/lib/python-3.12 \
  $PYROOT/bin/python3.12.wasm \
  -c "import json; print(json.dumps('hello'))"

DIR=build/test

rm -rf $DIR
mkdir -p $DIR
cp -r $CPPROOT/* $DIR

cat > $DIR/main.cc << EOF
#include <bits/stdc++.h>
int main(int argc, char **argv) {
  std::vector<std::string> v;
  for (size_t i = 0; i < argc; i++) {
    v.push_back(argv[i]);
  }
  int a;
  scanf("%d", &a);
  printf("%d\\n", a);
  for (size_t i = 0; i < argc; i++) {
    fprintf(stderr, "%zu: %s\\n", i, v[i].c_str());
  }
  return 0;
}
EOF

$(which wasmtime) -W threads=y -S threads=y --dir $DIR::/ \
  $DIR/bin/clang++ -cc1 -isysroot / \
  "-resource-dir" "lib/clang/19" -I "/include/c++/15.0.0/wasm32-wasi/" -I "/include/c++/15.0.0/" "-isysroot" "/" \
  "-internal-isystem" "lib/clang/19/include" "-internal-isystem" "/include/wasm32-wasi-threads" "-internal-isystem" "/include" \
  "-target-feature" "+atomics" "-target-feature" "+bulk-memory" "-target-feature" "+mutable-globals" \
  "-stdlib=libstdc++" \
  -O2 -emit-obj main.cc -o main.wasm

$(which wasmtime) -W threads=y -S threads=y --dir $DIR::/ \
  $DIR/bin/wasm-ld \
  -L /lib/wasm32-wasi-threads/ /lib/clang/19/lib/wasi/libclang_rt.builtins-wasm32.a \
  -lc /lib/wasm32-wasi-threads/crt1.o \
  -L /lib -lstdc++ -lsupc++ \
  -z stack-size=1048576 --shared-memory --import-memory --export-memory --max-memory=4294967296 \
  main.wasm -o main

$(which wasmtime) -W threads=y -S threads=y $DIR/main a b c d <<< 13845