forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
33 lines
1.0 KiB
33 lines
1.0 KiB
# 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
|
|
|