# Tired Supported **Tier definitions** - **A — Production Ready:** fully tested and stable. - **B — Almost Production Ready:** partially tested; close to production. - **C — Experimental / Not Production Ready:** unfinished or volatile. ## Architecture Support | Architecture | Tier | | ------------ | ----- | | **x86-64** | **A** | | **x86-32** | **A** | | AArch64 | B | | ARC | B[^1] | | ARM | B | | RISCV32 | B | | RISCV64 | B | | THUMB | B | | MIPS | C | | XTENSA | C | [^1]: will upgrade to **A** after further testing and validation. ## OS / Platform Support | Platform | Tier | | ------------------ | ----- | | **NuttX** | **A** | | **Ubuntu** | **A** | | Android | B | | macOS | B | | Windows | B | | Zephyr | B[^2] | | AliOS-Things | C | | Cosmopolitan | C | | ESP-IDF (FreeRTOS) | C | | FreeBSD | C | | iOS | C | | RT-Thread | C | | RIOT | C | | VxWorks | C | [^2]: will upgrade to **A** after further testing and validation. ## WebAssembly Proposal Support > Defaults below reflect the sample build configuration you provided (e.g., `WAMR_BUILD_*` values), not necessarily the release bundle. “Always-on” items are part of WAMR’s baseline. | WASM Proposal / Extension | Tier | Default | | -------------------------------------- | ----------- | ------- | | **Bulk Memory** | A | **On** | | **Extended Constant Expressions** | A | Off | | **Import/Export of Mutable Globals** | A | **On** | | **Memory64** | A | Off | | **Multi-value** | A | **On** | | **Non-trapping float-to-int** | A | **On** | | **Reference Types** | A | **On** | | **Shared Memory (Threads)** | A | Off | | **SIMD (128-bit)** | A | **On** | | **Sign-extension Operators** | A | **On** | | **Tail Calls** | A | Off | | GC (Garbage Collection) | B | Off | | Stringref | B | Off | | Multi-memory | C | Off | | Legacy Exception Handling | C | Off | | Branch Hinting | Unsupported | | | Custom Annotation Syntax (text format) | Unsupported | | | Exception Handling (new spec) | Unsupported | | | JS String Builtins | Unsupported | | | Relaxed SIMD | Unsupported | | # WAMR-Specific Feature Support > Defaults below mirror your sample build output (e.g., “enabled/disabled” lines) and common WAMR options. | WAMR Feature | Tier | Default | | --------------------------------- | ---- | ------- | | **AoT (wamrc)** | A | **On** | | **AOT intrinsics** | A | **On** | | **Fast Interpreter** | A | **Off** | | **Interpreter (classic)** | A | **On** | | **Libc builtin** | A | **On** | | **Libc WASI** | A | **On** | | **Quick AOT/JIT entries** | A | **On** | | **Shrunk memory** | A | **On** | | **Wakeup of blocking operations** | A | **On** | | **WASM C API** | A | **On** | | Fast JIT (tier-0) | B | Off | | LLVM ORC JIT (“lazy” JIT) | B | Off | | Memory profiling | B | Off | | Module instance context | B | On | | Multi-module | B | Off | | Perf profiling | B | Off | | Pthread | B | Off | | Shared heap | B | Off | | Tier-up (Fast JIT → LLVM JIT) | B | Off | | WASI threads | B | Off | | WASI-NN (neural network APIs) | B | Off | | Debug AOT | C | Off | --- # Appendix: All compilation flags | Compilation flags | Tired | Default | on Ubuntu | | ------------------------------------------- | ----- | ------- | --------- | | WAMR_APP_THREAD_STACK_SIZE_MAX | B | ND[^3] | | | WAMR_BH_LOG | B | ND | | | WAMR_BH_VPRINTF | B | ND | | | WAMR_BUILD_ALLOC_WITH_USAGE | B | ND | | | WAMR_BUILD_ALLOC_WITH_USER_DATA | B | ND | | | WAMR_BUILD_AOT | A | ND | 1 | | WAMR_BUILD_AOT_INTRINSICS | A | 1[^4] | | | WAMR_BUILD_AOT_STACK_FRAME | A | ND | | | WAMR_BUILD_AOT_VALIDATOR | B | ND | | | WAMR_BUILD_BULK_MEMORY | A | 1 | | | WAMR_BUILD_COPY_CALL_STACK | B | ND | | | WAMR_BUILD_CUSTOM_NAME_SECTION | B | ND | | | WAMR_BUILD_DEBUG_AOT | B | ND | | | WAMR_BUILD_DEBUG_INTERP | B | ND | | | WAMR_BUILD_DUMP_CALL_STACK | B | ND | | | WAMR_BUILD_DYNAMIC_AOT_DEBUG | B | ND | | | WAMR_BUILD_EXCE_HANDLING | C | 0 | | | WAMR_BUILD_EXTENDED_CONST_EXPR | A | 0 | | | WAMR_BUILD_FAST_INTERP | A | ND | 1 | | WAMR_BUILD_FAST_JIT | B | ND | | | WAMR_BUILD_FAST_JIT_DUMP | B | ND | | | WAMR_BUILD_GC | B | 0 | | | WAMR_BUILD_GC_HEAP_VERIFY | B | ND | | | WAMR_BUILD_GLOBAL_HEAP_POOL | A | ND | | | WAMR_BUILD_GLOBAL_HEAP_SIZE | A | ND | | | WAMR_BUILD_INSTRUCTION_METERING | C | ND | | | WAMR_BUILD_INTERP | A | ND | 1 | | WAMR_BUILD_INVOKE_NATIVE_GENERAL | B | ND | | | WAMR_BUILD_JIT | B | ND | | | WAMR_BUILD_LAZY_JIT | B | 1[^5] | | | WAMR_BUILD_LIBC_BUILTIN | A | ND | 1 | | WAMR_BUILD_LIBC_EMCC | C | ND | | | WAMR_BUILD_LIBC_UVWASI | C | ND | | | WAMR_BUILD_LIBC_WASI | A | ND | 1 | | WAMR_BUILD_LIB_PTHREAD | A | ND | | | WAMR_BUILD_LIB_PTHREAD_SEMAPHORE | A | ND | | | WAMR_BUILD_LIB_RATS | C | ND | | | WAMR_BUILD_LIB_WASI_THREADS | A | ND | | | WAMR_BUILD_LINUX_PERF | B | ND | | | WAMR_BUILD_LOAD_CUSTOM_SECTION | A | ND | | | WAMR_BUILD_MEMORY64 | A | 0 | | | WAMR_BUILD_MEMORY_PROFILING | B | ND | | | WAMR_BUILD_MINI_LOADER | B | ND | | | WAMR_BUILD_MODULE_INST_CONTEXT | B | ND | 1 | | WAMR_BUILD_MULTI_MEMORY | C | 0 | | | WAMR_BUILD_MULTI_MODULE | B | ND | | | WAMR_BUILD_PERF_PROFILING | B | ND | | | WAMR_BUILD_PLATFORM | - | ND | linux | | WAMR_BUILD_QUICK_AOT_ENTRY | A | 1[^6] | | | WAMR_BUILD_REF_TYPES | A | ND | 1 | | WAMR_BUILD_SANITIZER | B | ND | | | WAMR_BUILD_SGX_IPFS | C | ND | | | WAMR_BUILD_SHARED_HEAP | A | ND | | | WAMR_BUILD_SHARED_MEMORY | A | 0 | 1 | | WAMR_BUILD_SHRUNK_MEMORY | A | ND | 1 | | WAMR_BUILD_SIMD | A | ND | 1 | | WAMR_BUILD_SIMDE | A | ND | 1 | | WAMR_BUILD_SPEC_TEST | A | ND | | | WAMR_BUILD_STACK_GUARD_SIZE | B | ND | | | WAMR_BUILD_STATIC_PGO | B | ND | | | WAMR_BUILD_STRINGREF | B | 0 | | | WAMR_BUILD_TAIL_CALL | A | 0 | 1 | | WAMR_BUILD_TARGET | - | ND | X86-64 | | WAMR_BUILD_THREAD_MGR | A | ND | | | WAMR_BUILD_WAMR_COMPILER | A | ND | | | WAMR_BUILD_WASI_EPHEMERAL_NN | B | ND | | | WAMR_BUILD_WASI_NN | B | ND | | | WAMR_BUILD_WASI_NN_ENABLE_EXTERNAL_DELEGATE | B | ND | | | WAMR_BUILD_WASI_NN_ENABLE_GPU | B | ND | | | WAMR_BUILD_WASI_NN_EXTERNAL_DELEGATE_PATH | B | ND | | | WAMR_BUILD_WASI_NN_LLAMACPP | B | ND | | | WAMR_BUILD_WASI_NN_ONNX | B | ND | | | WAMR_BUILD_WASI_NN_OPENVINO | B | ND | | | WAMR_BUILD_WASI_NN_TFLITE | B | ND | | | WAMR_BUILD_WASI_TEST | B | ND | | | WAMR_BUILD_WASM_CACHE | B | ND | | | WAMR_CONFIGURABLE_BOUNDS_CHECKS | C | ND | | | WAMR_DISABLE_APP_ENTRY | A | ND | | | WAMR_DISABLE_HW_BOUND_CHECK | A | ND | | | WAMR_DISABLE_STACK_HW_BOUND_CHECK | A | ND | | | WAMR_DISABLE_WAKEUP_BLOCKING_OP | B | ND | | | WAMR_DISABLE_WRITE_GS_BASE | B | ND | | | WAMR_TEST_GC | B | ND | | [^3]: _ND_ represents _not defined_ [^4]: active if `WAMR_BUILD_AOT` is 1 [^5]: active if `WAMR_BUILD_FAST_JIT` or `WARM_BUILD_JIT1` is 1 [^6]: active if `WAMR_BUILD_AOT` or `WAMR_BUILD_JIT` is 1