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from SCons.Script import *
def do_patch(target, source):
for k, v in source.items():
if k in target and isinstance(v, dict):
do_patch(target[k], v)
else:
target[k] = v
def SelectMCU(env, mcu, variant_dir = None, patch = None):
spec = env.PlatformSpec(mcu = mcu)
if len(spec) <= 1:
print('Unknown MCU: %s' % mcu)
Exit(1)
if patch:
do_patch(spec, patch)
detected_gcc = env.Detect([f'{toolchain}-gcc' for toolchain in spec['toolchains']])
if detected_gcc is None:
print('Couldn\'t find a suitable toolchain.')
print('Toolchains searched for:')
for toolchain in spec['toolchains']:
print(f' * {toolchain}')
Exit(1)
env.SetDefault(
TOOLCHAIN = detected_gcc[:-3],
)
env.Replace(
PLATFORM_SPEC = spec,
CC = '${TOOLCHAIN}gcc',
CXX = '${TOOLCHAIN}g++',
AS = '${TOOLCHAIN}gcc',
LINK = '${TOOLCHAIN}g++',
AR = '${TOOLCHAIN}ar',
RANLIB = '${TOOLCHAIN}ranlib',
CCFLAGS = Split('-O2 -Wall -ggdb -ffunction-sections -fdata-sections'),
CXXFLAGS = Split('-std=c++20 -fno-exceptions -fno-rtti -fcoroutines -Wno-volatile'),
ASFLAGS = Split('-c -x assembler-with-cpp'),
LINKFLAGS = Split('-Wall -nostartfiles -Wl,-T${LINK_SCRIPT} -Wl,--gc-sections'),
CPPPATH = ['${LAKS_PATH}'],
LIBPATH = ['${LAKS_PATH}/ld_scripts'],
LIB_SOURCES = [],
CPPDEFINES = ['LAKS'],
)
env.Replace(
LINK_SCRIPT = 'generated.ld',
)
env.Append(
CCFLAGS = spec.get('cflags', []),
LINKFLAGS = spec.get('cflags', []),
CPPDEFINES = spec.get('define', []),
)
env.SConscript('${LAKS_PATH}/SConscript', variant_dir = variant_dir, exports = 'env')
def exists():
return True
def generate(env):
env.AddMethod(SelectMCU)
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