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76df6815da
Extend the "depends on" syntax to support conditional dependencies using "depends on X if Y". While functionally equivalent to "depends on X || (Y == n)", "depends on X if Y" is much more readable and makes the kconfig language uniform in supporting the "if <expr>" suffix. This also improves readability for "optional" dependencies, which are the subset of conditional dependencies where X is Y. Previously such optional dependencies had to be expressed as the counterintuitive "depends on X || !X", now this can be represented as "depends on X if X". The change is implemented by converting the "X if Y" syntax into the "X || (Y == n)" syntax during "depends on" token processing. Signed-off-by: Nicolas Pitre <nico@fluxnic.net> [Graham Roff: Rewrote commit message, updated patch, added tests] Signed-off-by: Graham Roff <grahamr@qti.qualcomm.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Link: https://patch.msgid.link/20251215-kconfig_conditional_deps-v3-1-59519af0a5df@qti.qualcomm.com [nathan: Minor adjustments to spacing] Signed-off-by: Nathan Chancellor <nathan@kernel.org>