CONFIG_* defines

[Bernhard Fischer]

On Wed, Sep 07, 2005 at 11:51:25AM -0500, Rob Landley wrote:
>On Wednesday 07 September 2005 02:44, Bernhard Fischer wrote:
>> >I've been slowly switching things over to the ENABLE_* macros, which
>> > instead of being defined or undefined are always defined, but to 0 or 1. 
>> > That way they can be used in normal if() statements.  Since it's a
>> > constant, the
>>
>> Yes, since you started to do that, i'm getting:
>> applets/applets.c:447: warning: empty body in an if-statement
>> applets/applets.c:455: warning: empty body in an if-statement
>> applets/busybox.c:74: warning: empty body in an if-statement
>> See e.g. allnoconfig.
>
>I checked in a some fixes to scripts/config/confdata.c:
>
>http://www.busybox.net/cgi-bin/viewcvs.cgi/trunk/busybox/scripts/config/confdata.c?rev=11329&view=log
>
>Unfortunately, yet another example of how our make dependencies are horked is 
>that not only does scripts/config not get rebuilt, but a "make clean" doesn't 
>delete scripts/config/{conf,mconf,mkconfigs}

make distclean would (see the "$(MAKE) -C scripts/config clean" there).
>
>Do a "make clean", then delete those three files by hand, and then rebuild.

I was experiencing this on a fresh checkout; abovementioned checkin does
result for me in
#
# (null)
#
CONFIG_TEST=y
# CONFIG_FEATURE_TEST_64 is not set
CONFIG_TOUCH=y
CONFIG_TR=y

instead of formerly:
#
# test (forced enabled for use with shell)
#
CONFIG_FEATURE_TEST_64=y
CONFIG_TOUCH=y
CONFIG_TR=y

svn history 11329
gives the advise to look at help, so i've no idea what you "fixed" in
that ci, unfortunately.

>> >compiler's "dead code elimination" optimization (a very old and very
>> > simple optimization, one even fabrice bellard's "tiny C compiler" does)
>> > can chop them out.
>>
>> yes, tcc also has dead code elimination. It doesn't support
>> variable-sized arrays, currently. It should be taught to deal with them
>> as they are useful generally and also used in busybox. I remember i got
>> some headache from starting to support tcc -E some time ago, though.
>
>I keep meaning to play with it more than I have, but it's not like I have a 
>shortage of things to do... :)

sounds familiar ;)
cheerio,
Bernhard
>
>Rob
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