blob: 365ceb3424b1a522bf2902947c92667e9e4cdea8 [file] [log] [blame]
# Select broken dependency issue
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# Test with:
# make KBUILD_KCONFIG=Documentation/kbuild/ menuconfig
# kconfig will not complain and enable this layout for configuration. This is
# currently a feature of kconfig, given select was designed to be heavy handed.
# Kconfig currently does not check the list of symbols listed on a symbol's
# "select" list, this is done on purpose to help load a set of known required
# symbols. Because of this use of select should be used with caution. An
# example of this issue is below.
# The option B and C are clearly contradicting with respect to A.
# However, when A is set, C can be set as well because Kconfig does not
# visit the dependencies of the select target (in this case B). And since
# Kconfig does not visit the dependencies, it breaks the dependencies of B
# (!A).
mainmenu "Simple example to demo kconfig select broken dependency issue"
config A
bool "CONFIG A"
config B
bool "CONFIG B"
depends on !A
config C
bool "CONFIG C"
depends on A
select B