How to build WAMR for RP2350 (thumbv8m.main-none-eabihf) target

[JarvisPrestidge]

Summary

I'm trying to build WAMR for the Raspberry Pi Pico 2 (RP2350) which uses an ARM Cortex-M33 core (ARMv8-M architecture). The build fails during CMake's compiler test phase with linking errors related to missing syscall implementations.

Environment

• Host OS: macOS (Apple Silicon M1)
• Target: Raspberry Pi Pico 2 (RP2350)
• Target Architecture: ARM Cortex-M33 (ARMv8-M)
• Toolchain: ARM GNU Toolchain 12.3.Rel1 (arm-none-eabi-gcc)
• CMake: 3.29.6
• WAMR Version: v1.1.0 (via wamr-rust-sdk)

Current Configuration

I'm building through the wamr-rust-sdk with these CMake configurations (but I'm throwing everything at it at this point to see what will stick):

WAMR_BUILD_PLATFORM=linux
WAMR_BUILD_TARGET=arm
WAMR_BUILD_INTERP=1
WAMR_BUILD_FAST_INTERP=1
WAMR_BUILD_AOT=1
WAMR_BUILD_JIT=0
WAMR_BUILD_FAST_JIT=0
WAMR_BUILD_LIBC_WASI=0
WAMR_BUILD_LIBC_BUILTIN=1
WAMR_BUILD_MINI_LOADER=1

Error Details

The build fails during CMake's compiler test with these linking errors:
CMake Error: The C compiler "/opt/homebrew/bin/arm-none-eabi-gcc" is not able to compile a simple test program.

Linking errors:

• undefined reference to `_exit'
• undefined reference to `_close'
• undefined reference to `_lseek'
• undefined reference to `_read'
• undefined reference to `_sbrk'
• undefined reference to `_write'

Expected Outcome

WAMR should build successfully for the RP2350 target, allowing WebAssembly execution on this embedded platform.

Additional Context

The RP2350 is a new microcontroller from Raspberry Pi with dual ARM Cortex-M33 cores, similar to other ARM Cortex-M targets that WAMR already supports. It should be feasible to get WAMR working on this platform.
Any guidance on the correct build configuration or platform-specific considerations would be greatly appreciated!

[TianlongLiang]

Your error message:

CMake Error: The C compiler "/opt/homebrew/bin/arm-none-eabi-gcc" is not able to compile a simple test program.

seems more like a cross-compile toolchain set up error than a WAMR-related one. Are you able to build any program with the same toolchain file?(in which you set several variables like CMAKE_SYSTEM_PROCESSOR CMAKE_C/CXX_COMPILER, and CMAKE_F_FLAGS)