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import os
import sys
import subprocess
import toml
from building import *
cwd = GetCurrentDir()
RUSTC_FLAGS = {
"linker": "-C linker=ld.lld",
"panic": "-C panic=abort",
}
CARGO_CMD = {
"base": "cargo build",
"build_std": "-Z build-std=core,alloc,panic_abort",
"target_flag": "--target",
"target_arch": "%s",
"release_profile": "--release",
"debug_profile": "", # No additional flag for debug mode
}
tools_dir = os.path.join(cwd, '..', '..', 'tools')
sys.path.insert(0, tools_dir)
from build_support import detect_rust_target, ensure_rust_target_installed, clean_rust_build
def _has(sym: str) -> bool:
"""Helper function to check if a configuration symbol is enabled"""
try:
return bool(GetDepend([sym]))
except Exception:
return bool(GetDepend(sym))
def detect_target_for_dynamic_modules():
"""
Detect the appropriate Rust target for dynamic modules.
For dynamic modules, we need Linux targets instead of bare-metal targets.
"""
if detect_rust_target is not None:
try:
import rtconfig
bare_metal_target = detect_rust_target(_has, rtconfig)
if bare_metal_target:
if "riscv64" in bare_metal_target:
return "riscv64gc-unknown-linux-gnu"
elif "riscv32" in bare_metal_target:
return "riscv32gc-unknown-linux-gnu"
elif "aarch64" in bare_metal_target:
return "aarch64-unknown-linux-gnu"
elif "arm" in bare_metal_target or "thumb" in bare_metal_target:
return "armv7-unknown-linux-gnueabihf"
except Exception as e:
print(f"Error: Target detection failed: {e}")
raise RuntimeError(f"Failed to detect Rust target for dynamic modules: {e}")
print("Error: Unable to detect appropriate Rust target for dynamic modules")
raise RuntimeError("Target detection failed - no valid target found")
def build_rust_module(module_dir, build_root):
"""Build a Rust dynamic module with automatic target detection"""
cargo_toml_path = os.path.join(module_dir, 'Cargo.toml')
if not os.path.exists(cargo_toml_path):
return [], [], ""
with open(cargo_toml_path, 'r') as f:
cargo_config = toml.load(f)
module_name = cargo_config['package']['name']
# Detect target automatically based on the current configuration
target = detect_target_for_dynamic_modules()
print(f"Building Rust module '{module_name}' for target: {target}")
# Detect debug mode from rtconfig (same as main rust/SConscript)
debug = bool(_has('RUST_DEBUG_BUILD'))
build_mode = "debug" if debug else "release"
print(f"Building in {build_mode} mode")
# Use global RUSTFLAGS configuration for dynamic modules
rustflags = " ".join(RUSTC_FLAGS.values())
# Verify that the target is installed
if ensure_rust_target_installed is not None:
if not ensure_rust_target_installed(target):
print(f"Error: Rust target '{target}' is not installed")
print(f"Please install it with: rustup target add {target}")
return [], [], ""
else:
print(f"Warning: Cannot verify if target '{target}' is installed")
# Set up build environment
env = os.environ.copy()
env['RUSTFLAGS'] = rustflags
env['CARGO_TARGET_DIR'] = build_root
# Build the module with configurable parameters using dictionary configuration
build_cmd = [
CARGO_CMD["base"].split()[0], # 'cargo'
CARGO_CMD["base"].split()[1], # 'build'
CARGO_CMD["target_flag"], # '--target'
target, # actual target architecture
]
# Add profile flag based on debug mode
profile_flag = CARGO_CMD["debug_profile"] if debug else CARGO_CMD["release_profile"]
if profile_flag:
build_cmd.append(profile_flag)
# Add build-std flag if specified
if CARGO_CMD["build_std"]:
build_std_parts = CARGO_CMD["build_std"].split()
build_cmd.extend(build_std_parts)
try:
subprocess.run(build_cmd, cwd=module_dir, env=env, check=True, capture_output=True)
lib_dir = os.path.join(build_root, target, build_mode)
return [module_name], [lib_dir], ""
except subprocess.CalledProcessError:
return [], [], ""
# Check dependencies
if not _has('RT_RUST_BUILD_MODULES'):
Return([])
build_root = os.path.join(Dir('#').abspath, "build", "rust_modules")
# Handle clean operation
if GetOption('clean'):
if clean_rust_build is not None:
modules_build_dir = clean_rust_build(Dir('#').abspath, "rust_modules")
if os.path.exists(modules_build_dir):
print(f'Registering {modules_build_dir} for cleanup')
Clean('.', modules_build_dir)
else:
print('No rust_modules build artifacts to clean')
else:
print('Warning: clean_rust_build function not available')
else:
# Build all Rust modules in subdirectories
modules_built = []
for item in os.listdir(cwd):
item_path = os.path.join(cwd, item)
if os.path.isdir(item_path) and os.path.exists(os.path.join(item_path, 'Cargo.toml')):
result = build_rust_module(item_path, build_root)
if result[0]:
modules_built.extend(result[0])
if modules_built:
print(f"Successfully built {len(modules_built)} Rust dynamic module(s): {', '.join(modules_built)}")
group = DefineGroup(
'rust_modules',
[],
depend=['RT_RUST_BUILD_MODULES']
)
Return('group')
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