Blame flags/assertflags.py
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"""
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This script asserts that Python config vars with compiler options including
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one or more -O flags have the last specified -O flag equal to the script's
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first argument.
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We use it to check that the debug build (as well as extension modules) was
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built with a desired optimization level (usually -Og or -O0).
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About -O flags: https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html
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"If you use multiple -O options, with or without level numbers,
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the last such option is the one that is effective."
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"""
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import sys
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import sysconfig
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# The flags that currently don't have the -Og flag on the debug build
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# and we consider it OK, because we don't know any better :)
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WHITELIST = [
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'CONFIGURE_CFLAGS',
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'CONFIGURE_CFLAGS_NODIST',
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'CONFIG_ARGS',
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'OPT',
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]
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print('Expecting that {} is the last -O flag:\n'.format(sys.argv[1]))
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ret = 0
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for key, flags in sysconfig.get_config_vars().items():
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if key in WHITELIST:
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continue
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if isinstance(flags, str):
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oflags = [f for f in flags.split(' ') if f.startswith('-O')]
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if oflags and oflags[-1] != sys.argv[1]:
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print('Problem in {} -O flags: {}'.format(key, ' '.join(oflags)))
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ret = 1
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elif oflags:
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print('{} are OK'.format(key))
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sys.exit(ret)
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