mirror of https://gitee.com/openkylin/linux.git
34 lines
1.0 KiB
Plaintext
34 lines
1.0 KiB
Plaintext
|
# Select broken dependency issue
|
||
|
|
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||
|
|
#
|
||
|
|
# Test with:
|
||
|
|
#
|
||
|
|
# make KBUILD_KCONFIG=Documentation/kbuild/Kconfig.select-break 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
|