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import os
import sys
from building import *
from SCons.Subst import quote_spaces
cwd = GetCurrentDir()
sys.path.append(os.path.join(cwd, '../tools'))
from build_support import (
detect_rust_target,
make_rustflags,
make_cargo_build_std_args,
collect_features,
verify_rust_toolchain,
ensure_rust_target_installed,
cargo_build_staticlib,
get_staticlib_link_name,
clean_rust_build,
)
def _has(sym: str) -> bool:
try:
return bool(GetDepend([sym]))
except Exception:
return bool(GetDepend(sym))
group = []
if not _has('RT_RUST_CORE') and not GetOption('clean'):
Return('group')
def get_staticlib_link_name_from_artifact(lib_path):
"""Derive the link name from the actual staticlib artifact file name."""
artifact_name = os.path.basename(os.fspath(lib_path))
if artifact_name.startswith("lib") and artifact_name.endswith(".a"):
return artifact_name[3:-2]
return None
# Source files – MSH command glue.
# rust_cmd.c references rust_init(), which is only provided by the Rust core
# static library. It must only enter the build when that library is actually
# produced; otherwise the C link stage fails with 'undefined reference to
# rust_init' instead of failing/skipping cleanly at the Rust build step.
LIBS = []
LIBPATH = []
LINKFLAGS = ""
include_rust_cmd = False
if GetOption('clean'):
# Register Rust artifacts for cleaning
rust_build_dir = clean_rust_build(Dir('#').abspath)
if os.path.exists(rust_build_dir):
print(f'Registering {rust_build_dir} for cleanup')
Clean('.', rust_build_dir)
else:
print('No rust build artifacts to clean')
# Keep rust_cmd.c in the group during clean so its object is cleaned too.
include_rust_cmd = True
else:
if verify_rust_toolchain():
import rtconfig
rust_build_dir = clean_rust_build(Dir('#').abspath)
target = detect_rust_target(_has, rtconfig)
if not target:
print('Error: Unable to detect Rust target; please check configuration')
sys.exit(1)
else:
print(f'Detected Rust target: {target}')
# Optional hint if target missing
if not ensure_rust_target_installed(target):
print('Error: Rust target is not installed; Rust library build failed')
sys.exit(1)
else:
# Build mode and features
debug = bool(_has('RUST_DEBUG_BUILD'))
features = collect_features(_has)
rustflags = make_rustflags(rtconfig, target)
cargo_extra_args = make_cargo_build_std_args(rtconfig, target)
rust_lib = cargo_build_staticlib(
rust_dir=cwd, target=target, features=features, debug=debug, rustflags=rustflags, build_root=rust_build_dir, cargo_extra_args=cargo_extra_args
)
if rust_lib:
# Derive the link name from the actual artifact so it always
# matches the file that was built. Only fall back to
# re-parsing Cargo.toml when the artifact name does not
# follow the lib<name>.a convention.
link_lib_name = get_staticlib_link_name_from_artifact(rust_lib)
if not link_lib_name:
link_lib_name = get_staticlib_link_name(cwd)
LIBS = [link_lib_name]
LIBPATH = [os.path.dirname(rust_lib)]
if rtconfig.PLATFORM == 'armclang':
if not (os.path.isfile(rust_lib) and os.path.getsize(rust_lib) > 0):
print(f'Error: ArmClang Rust core link requires a non-empty archive, but got: {rust_lib}')
sys.exit(1)
LINKFLAGS = " " + quote_spaces(os.fspath(rust_lib))
LIBS = []
LIBPATH = []
include_rust_cmd = True
print('Rust library linked successfully')
else:
print('Error: Failed to build Rust library')
sys.exit(1)
else:
print('Error: Rust toolchain not found')
print('Please install Rust from https://rustup.rs')
sys.exit(1)
# Only define the component group (with rust_cmd.c) when the Rust core static
# library was actually produced, so its rust_init() reference always resolves.
if include_rust_cmd:
group = DefineGroup('rust', ['rust_cmd.c'], depend=['RT_USING_RUST', 'RT_RUST_CORE'], LIBS=LIBS, LIBPATH=LIBPATH, LINKFLAGS=LINKFLAGS)
Return('group')
|
