Roman Zippel wrote:
> Hi,
>
> On Thu, 21 Feb 2002, Giacomo Catenazzi wrote:
>
>
>>1) default: Eric proposed to include defaults in configuration,
>> but it seems that is a bad things, and defaults should be arch
>> specific. (I don't remember the discussion, but you can
>> parse the kbuild list, torque.net time)
>>
>
> The defaults are just 1:1 representation of the current define_xxx
> statements. These can be of course later moved or depreciated or whatever.
Ok. But actually the defaults come mainly from config.def.
The define_xxx are uset to set a symbols in some situations.
BTW for people who like the old configure (or fix it):
: if xxx
: define_bool CONFIG_FOO
: else
: bool CONFIG_FOO
: fi
is incorrect. You should revert the definition order
(before bool than define_bool) else xconfig will break.
>>2) One of the problem in actual configure are the dependencies.
>> FOO depend on BAR and BEER.
>> Wat are the possible value of FOO if BAR=m, BEER=y.
>> In kernel we have some drivers thet need foo to be n or y,
>> in other cases: n or m.
>> The logical operators hide the true dependency table.
>> (don't expect developers read the docs: the logical operators
>> seems like C operators, so they use like C, but they forget
>> the third case (=m) ).
>>
>
> For most cases I've seen it can be very simply defined with:
> (a && b && ...) = min(a, b, ...)
> (a || b || ...) = max(a, b, ...)
> for 'n'=0, 'm'=1, 'y'=2
With this you have a value (i.e. n,m,y).
How is the actual symbol range?
CONFIG_FOO:
dep: (FREE? && BEER?)
how you tell configuration rools that
FOO can be only min/max of (FREE? && BEER?)
> Do you have some real examples?
No by hand. But I can search in rules.
>>Do you use the python identation mode?
>>
>
> No python. Just c, flex and bison. :-)
I mean: Do you use pythons mode to tell when a
help description end (no tab: new symbol), few spaces:
is symbol help or configuration symbols)
giacomo
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This archive was generated by hypermail 2b29 : Sat Feb 23 2002 - 21:00:33 EST