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05 April 2024, 19:05:47 UTC
Revision 59faba1b316a7798a33752b3889193333f8af1a0 authored by Trent Piepho on 27 June 2007, 21:09:54 UTC, committed by Linus Torvalds on 28 June 2007, 18:34:53 UTC 
Fix Kconfig dependency problems wrt boolean menuconfigs
 
If one has a dependency chain (tristate)FOO depends on (bool)BAR depends on
(tristate)BAZ, build problems will result.  If BAZ=m, then BAR can be set
y, which allows FOO=y.  It's possible to have FOO=y && BAZ=m, which
wouldn't be allowed if FOO depended directly on BAZ.  In effect, the bool
promotes the tristate from m to y.

This ends up causing a problem with several menuconfigs that look like:

menuconfig BAR
	bool
	depends on BAZ [tristate]
if BAR
config FOO
	tristate
endif

The solution used here is to add the dependencies of BAR to the if
statement, so that items in the if block will gain a direct
non-bool-promoted dependency on BAZ.  This is how it would work if a menu
was used instead of an if block.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Acked-by: Jeff Garzik <jeff@garzik.org>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Chas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 30acbab
History
Tip revision: 59faba1b316a7798a33752b3889193333f8af1a0 authored by Trent Piepho on 27 June 2007, 21:09:54 UTC
Fix Kconfig dependency problems wrt boolean menuconfigs
Tip revision: 59faba1
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