third_party.pigweed.src/pw_bloat/py/no_toolchains.py

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pw_toolchain_size_report template This change adds a GN template which creates a size report card across a set of different toolchains. The toolchains are defined in a build variable, each with an optional linker script and Bloaty config. The size report template builds a base and diff executable with each of the toolchains and compares the size difference of each. Example output for the host target: simple_bloat_toolchain ────────────────────── ┌───────────┬─────────┬────────┬───────┬───────┐ │ Label │ Segment │ Before │ Delta │ After │ ├═══════════┼═════════┼════════┼═══════┼═══════┤ │ gcc -Og │ CODE │ 413 │ +32 │ 445 │ │ │ RAM │ 576 │ +8 │ 584 │ ├───────────┼─────────┼────────┼───────┼───────┤ │ gcc -Os │ CODE │ 429 │ +16 │ 445 │ │ │ RAM │ 576 │ +8 │ 584 │ ├───────────┼─────────┼────────┼───────┼───────┤ │ gcc -O2 │ CODE │ 429 │ +32 │ 461 │ │ │ RAM │ 576 │ +8 │ 584 │ ├───────────┼─────────┼────────┼───────┼───────┤ │ clang -Og │ CODE │ 448 │ +32 │ 480 │ │ │ RAM │ 113 │ +15 │ 128 │ ├───────────┼─────────┼────────┼───────┼───────┤ │ clang -Os │ CODE │ 432 │ +16 │ 448 │ │ │ RAM │ 113 │ +15 │ 128 │ ├───────────┼─────────┼────────┼───────┼───────┤ │ clang -O2 │ CODE │ 448 │ +80 │ 528 │ │ │ RAM │ 113 │ +15 │ 128 │ └───────────┴─────────┴────────┴───────┴───────┘ Change-Id: I2c65f4d4f61354b9779628f207297eacd04470b9
2019-12-19 00:13:38 +00:00
# Copyright 2019 The Pigweed Authors
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
"""Outputs a ReST warning about the size toolchains variable being empty."""
import os
import sys
_NO_TOOLCHAIN_ERROR: str = '''
.. warning::
The ``pw_size_report_toolchains`` build variable is empty for this target.
Size reports will not be generated.
See :ref:`bloat-howto` for details on how to set up size reports.
'''
def main() -> int:
os.makedirs(os.path.dirname(sys.argv[1]), exist_ok=True)
with open(sys.argv[1], 'w') as fd:
fd.write(_NO_TOOLCHAIN_ERROR)
return 0
if __name__ == '__main__':
sys.exit(main())