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rules.bzl
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rules.bzl
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""
load("@bazel_arm//:rules.bzl", "arm_toolchain")
load("@bazel_stm32//mcu:stm32_famillies.bzl", "STM32_FAMILLIES_LUT")
def _stm32_rules_impl(rctx):
substitutions = {
"%{rctx_name}": rctx.name,
"%{toolchain_path}": "external/{}/".format(rctx.name),
"%{arm_none_eabi_repo_name}": rctx.attr.arm_none_eabi_repo_name,
"%{MCU_ID}": rctx.attr.stm32_mcu,
"%{MCU_FAMILLY}": rctx.attr.stm32_familly,
"%{mcu_startupfile}": rctx.path(rctx.attr.mcu_startupfile).basename,
"%{exec_compatible_with}": json.encode(rctx.attr.exec_compatible_with),
"%{target_compatible_with}": json.encode(rctx.attr.target_compatible_with),
"%{toolchain_mcu_constraint}": json.encode(rctx.attr.toolchain_mcu_constraint),
}
rctx.template(
"BUILD",
Label("//templates:BUILD.tpl"),
substitutions
)
rctx.template(
"rules.bzl",
Label("//templates:rules.bzl.tpl"),
substitutions
)
_stm32_rules = repository_rule(
attrs = {
'arm_none_eabi_repo_name': attr.string(mandatory = True),
'stm32_mcu': attr.string(mandatory = True),
'stm32_familly': attr.string(mandatory = True),
'mcu_startupfile': attr.label(mandatory = True, allow_single_file = True),
'exec_compatible_with': attr.string_list(default = []),
'toolchain_mcu_constraint': attr.string_list(default = []),
'target_compatible_with': attr.string_list(default = []),
},
local = False,
implementation = _stm32_rules_impl,
)
def stm32_toolchain(
name,
stm32_mcu,
mcu_ldscript,
mcu_device_group,
mcu_startupfile,
copts = [],
conlyopts = [],
cxxopts = [],
linkopts = [],
defines = [],
includedirs = [],
linkdirs = [],
libc = True,
libm = True,
libnosys = True,
specs = "-specs=nano.specs",
gc_sections = True,
use_mcu_constraint = True,
exec_compatible_with = [],
target_compatible_with = [],
arm_none_eabi_version = "latest",
arm_toolchain_package = None,
internal_arm_toolchain_extras_filegroups = [],
internal_arm_toolchain_local_download = True,
internal_arm_toolchain_auto_register = True
):
"""STM32 toolchain
This macro create a repository containing all files needded to get an STM32 toolchain using an arm-none-eabi Toolchain
Args:
name: Name of the repo that will be created
stm32_mcu: STM32 mcu name
mcu_ldscript: mcu_ldscript
mcu_device_group: mcu_device_group
mcu_startupfile: mcu_startupfile
copts: copts
conlyopts: conlyopts
cxxopts: cxxopts
linkopts: linkopts
defines: defines
includedirs: includedirs
linkdirs: linkdirs
libc: Does include libc '-lc'
libm: Does include libm '-lm'
libnosys: Does include libnosys '-lnosys'
specs: specs for the compiler (nano, nosys, ...) by default: nano
gc_sections: Enable the garbage collection of unused sections
use_mcu_constraint: Add the mcu_constraint list (cpu / stm32 familly) to the target_compatible_with
exec_compatible_with: The exec_compatible_with list for the toolchain
target_compatible_with: The target_compatible_with list for the toolchain
arm_none_eabi_version: The arm-none-eabi archive version
arm_toolchain_package: The arm_toolchain to use
internal_arm_toolchain_extras_filegroups: internal_arm_toolchain_extras_filegroups
internal_arm_toolchain_local_download: If set to false the internal arm-none-eabi toolchain will be used as an external dependencies
internal_arm_toolchain_auto_register: If the internal arm-none-eabi toolchain is registered to bazel using `register_toolchains`
"""
stm32_mcu = stm32_mcu.upper()
stm32_familly = stm32_mcu[:7]
stm32_familly_info = STM32_FAMILLIES_LUT[stm32_familly]
mcu = [ stm32_familly_info.cpu, "-mthumb" ]
if hasattr(stm32_familly_info, "fpu") and stm32_familly_info.fpu != None:
mcu += [ stm32_familly_info.fpu_abi, stm32_familly_info.fpu ]
copts = mcu + copts
linkopts = mcu + [ "-T{}".format(mcu_ldscript) ] + linkopts
defines = defines + [ "USE_HAL_DRIVER", mcu_device_group ]
includedirs = includedirs + [
"Core/Inc",
"Drivers/{stm32_familly}xx_HAL_Driver/Inc".format(stm32_familly = stm32_familly),
"Drivers/{stm32_familly}xx_HAL_Driver/Inc/Legacy".format(stm32_familly = stm32_familly),
"Drivers/CMSIS/Device/ST/{stm32_familly}xx/Include".format(stm32_familly = stm32_familly),
"Drivers/CMSIS/Include"
]
linkopts = linkopts + ([ specs ] if specs != "" else [])
linkopts = linkopts + ([ "-lc" ] if libc else [])
linkopts = linkopts + ([ "-lm" ] if libm else [])
linkopts = linkopts + ([ "-lnosys" ] if libnosys else [])
if gc_sections:
copts += [ "-fdata-sections", "-ffunction-sections" ]
linkopts.append("-Wl,--gc-sections")
toolchain_mcu_constraint = [
"@platforms//cpu:{}".format(stm32_familly_info.arm_cpu_version),
"@bazel_stm32//mcu:{}".format(stm32_familly.lower()),
]
if use_mcu_constraint:
target_compatible_with = target_compatible_with + toolchain_mcu_constraint
if arm_toolchain_package == None:
arm_toolchain_package = "arm-none-eabi-" + stm32_mcu
arm_toolchain(
name = "arm-none-eabi-" + stm32_mcu,
arm_toolchain_type = "arm-none-eabi",
arm_toolchain_version = arm_none_eabi_version,
copts = copts,
conlyopts = conlyopts,
cxxopts = cxxopts,
linkopts = linkopts,
defines = defines,
includedirs = includedirs,
linkdirs = linkdirs,
add_toolchain_linkdirs = False,
exec_compatible_with = exec_compatible_with,
target_compatible_with = target_compatible_with,
toolchain_extras_filegroups = internal_arm_toolchain_extras_filegroups,
local_download = internal_arm_toolchain_local_download,
auto_register_toolchain = internal_arm_toolchain_auto_register,
)
_stm32_rules(
name = name,
arm_none_eabi_repo_name = arm_toolchain_package,
stm32_mcu = stm32_mcu,
stm32_familly = stm32_familly,
mcu_startupfile = mcu_startupfile,
toolchain_mcu_constraint = toolchain_mcu_constraint,
target_compatible_with = target_compatible_with,
)