Kconfig.select-break (1071B)
1# Select broken dependency issue 2# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 3# 4# Test with: 5# 6# make KBUILD_KCONFIG=Documentation/kbuild/Kconfig.select-break menuconfig 7# 8# kconfig will not complain and enable this layout for configuration. This is 9# currently a feature of kconfig, given select was designed to be heavy handed. 10# Kconfig currently does not check the list of symbols listed on a symbol's 11# "select" list, this is done on purpose to help load a set of known required 12# symbols. Because of this use of select should be used with caution. An 13# example of this issue is below. 14# 15# The option B and C are clearly contradicting with respect to A. 16# However, when A is set, C can be set as well because Kconfig does not 17# visit the dependencies of the select target (in this case B). And since 18# Kconfig does not visit the dependencies, it breaks the dependencies of B 19# (!A). 20 21mainmenu "Simple example to demo kconfig select broken dependency issue" 22 23config A 24 bool "CONFIG A" 25 26config B 27 bool "CONFIG B" 28 depends on !A 29 30config C 31 bool "CONFIG C" 32 depends on A 33 select B