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#!/usr/bin/env python
# Works like 'make allyesconfig'. Verified by the test suite to generate output
# identical to 'make allyesconfig', for all ARCHES.
#
# In theory, we need to handle choices in two different modes:
#
# y: One symbol is y, the rest are n
# m: Any number of symbols are m, the rest are n
#
# Only tristate choices can be in m mode.
#
# Here's a convoluted example of how you might get an m-mode choice even during
# allyesconfig:
#
# choice
# tristate "weird choice"
# depends on m
#
# ...
#
# endchoice
#
#
# Usage for the Linux kernel:
#
# $ make [ARCH=<arch>] scriptconfig SCRIPT=Kconfiglib/examples/allyesconfig.py
import kconfiglib
def main():
kconf = kconfiglib.standard_kconfig()
# Avoid warnings printed by Kconfiglib when assigning a value to a symbol that
# has no prompt. Such assignments never have an effect.
kconf.disable_warnings()
# Small optimization
BOOL_TRI = (kconfiglib.BOOL, kconfiglib.TRISTATE)
for sym in kconf.defined_syms:
if sym.orig_type in BOOL_TRI and not sym.choice:
sym.set_value(2)
# This might be slightly more robust than what the C tools do for choices,
# as raising one choice might allow other choices to be raised. It
# currently produces the same output for all ARCHes though.
while True:
changed = False
for choice in kconf.choices:
if choice.assignable and choice.tri_value < choice.assignable[-1]:
choice.set_value(choice.assignable[-1])
# For y-mode choices, we just let the choice get its default
# selection. For m-mode choices, we set all choice symbols to
# m.
if choice.tri_value == 1:
for sym in choice.syms:
sym.set_value(1)
changed = True
# Do multiple passes until we longer manage to raise any choices, like
# in allnoconfig_walk.py
if not changed:
break
kconf.write_config(kconfiglib.standard_config_filename())
if __name__ == "__main__":
main()
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