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setup_toolchains.py
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import argparse
import os
_AVAILABLE_TOOLCHAINS = {
'x86-64': {
'2021.11-5': {
'sha256': '6fe812add925493ea0841365f1fb7ca17fd9224bab61a731063f7f12f3a621b0',
'platform_arch': 'x86_64',
'tool_prefix': 'x86_64-buildroot-linux-gnu',
},
'2022.08-1': {
'sha256': '861c1e8ad0a66e4c28e7a1f8319d68080ab0ff8d16a765e65540f1957203a190',
'platform_arch': 'x86_64',
'tool_prefix': 'x86_64-buildroot-linux-gnu',
},
},
'x86-64-core-i7': {
'2020.08-1': {
'sha256': '3dd408e857f5c8e579748995477f2783fcf5ad0aac89719ea3c5c75446dfa63c',
'platform_arch': 'x86_64',
'tool_prefix': 'x86_64-buildroot-linux-gnu',
},
},
'aarch64': {
'2021.11-1': {
'sha256': 'dec070196608124fa14c3f192364c5b5b057d7f34651ad58ebb8fc87959c97f7',
'platform_arch': 'aarch64',
'tool_prefix': 'aarch64-buildroot-linux-gnu',
},
'2020.08-1': {
'sha256': '8ab7a2f17cb96621b048ab0a872650dd62faa54cd74c961b9902b8c04bff7dd1',
'platform_arch': 'aarch64',
'tool_prefix': 'aarch64-buildroot-linux-gnu',
},
},
'armv7-eabihf': {
'2020.08-1': {
'sha256': '7b6682603af9a9b5c0e46fd57165723483bb68295e827d14d238e63f33a147a8',
'platform_arch': 'armv7',
'tool_prefix': 'arm-buildroot-linux-gnueabihf',
},
},
}
_ALL_TOOLS = {
'ar': {
'buildroot_name': 'ar'
},
'cpp': {
'buildroot_name': 'cpp.br_real'
},
'gcc': {
'buildroot_name': 'gcc.br_real'
},
'gcov': {
'buildroot_name': 'gcov'
},
'ld': {
'buildroot_name': 'ld'
},
'nm': {
'buildroot_name': 'nm'
},
'objdump': {
'buildroot_name': 'objdump'
},
'strip': {
'buildroot_name': 'strip'
},
}
def create_wrappers(wrapper_dir):
for arch, buildroot_versions in _AVAILABLE_TOOLCHAINS.items():
try:
os.mkdir(os.path.join(wrapper_dir, arch))
except FileExistsError:
pass
for version, version_info in buildroot_versions.items():
try:
os.mkdir(os.path.join(wrapper_dir, arch, version))
except FileExistsError:
pass
for tool, tool_info in _ALL_TOOLS.items():
toolchain_name = f'{arch}-linux-gnu-{version}'
wrapper_name = f'{toolchain_name}-{tool}'
actual_tool_name = f'{version_info["tool_prefix"]}-{tool_info["buildroot_name"]}'
wrapper_path = os.path.join(wrapper_dir, arch, version, wrapper_name)
with open(wrapper_path, 'w') as f:
f.write('#!/bin/bash\n')
# Uses buildroot's ".br_real" wrapper to allow -no-canonical-prefix,
# -fno-canonical-system-headers, and --sysroot to correctly work (using relative paths).
f.write(f'exec external/{toolchain_name}/bin/{actual_tool_name} $@\n')
os.chmod(wrapper_path, 0o777)
def write_toolchain_info(filename):
with open(filename, 'w') as f:
f.write(f'AVAILABLE_TOOLCHAINS = {_AVAILABLE_TOOLCHAINS}\n')
f.write(f'ALL_TOOLS = {list(_ALL_TOOLS)}\n')
def write_test_script(filename):
with open(filename, 'w') as f:
f.write('#!/bin/bash\n')
f.write('set -e\n')
f.write('set -o xtrace\n\n')
for arch, buildroot_versions in _AVAILABLE_TOOLCHAINS.items():
for version in buildroot_versions:
platform = f'@bazel_bootlin//platforms:{arch}-linux-gnu-{version}'
f.write(f'bazel build --verbose_failures --platforms={platform} //test:test_cpp\n')
f.write(f'bazel build --verbose_failures --platforms={platform} //test:test_c\n')
os.chmod(filename, 0o777)
def main():
parser = argparse.ArgumentParser(description='Generate wrapper scripts for Bazel toolchains.')
args = parser.parse_args()
root_dir = os.path.dirname(os.path.realpath(__file__))
create_wrappers(os.path.join(root_dir, 'toolchains/tool_wrappers'))
write_toolchain_info(os.path.join(root_dir, 'toolchains/toolchain_info.bzl'))
write_test_script(os.path.join(root_dir, 'test_build_all.sh'))
if __name__ == '__main__':
main()