Hi Albert, On Sun, Jun 23, 2013 at 12:29 AM, Albert ARIBAUD <albert.u.b...@aribaud.net>wrote:
> Hi Simon, > > On Mon, 17 Jun 2013 07:44:52 -0700, Simon Glass <s...@chromium.org> > wrote: > > > Note that a config_drop.h file is added - this defines all the CONFIGs > > which are not used in any board config file. Without this, autoconf > cannot > > define the macros for this CONFIGs. > > > > Compile time for main.c does not seem to be any different in my tests. > The > > time to perform the 'dep' step (which now creates autoconf.h) increases, > > from about 2.8s to about 4.6s. This additional time is used to grep, sed > > and sort the contents of all the header file in U-Boot. The time for an > > incremental build is not affected. > > > > It would be much more efficient to maintain a list of all available > CONFIG > > defines, but no such list exists at present. > > Stop me if I am wrong, but do you not have this list already, since at > one point you grep, sed and sort the whole list of config options, then > at another point generate the list of unused ones? > Well yes I create the list. But I don't 'have' it in the sense that it is a pre-existing file in the tree. My point was that if the file existed I would not need to create it in the build system. I asked about this at one point, and the comment was made that putting it in the source tree 'staticly' is risky, since someone might add a new option and it would not work. Perhaps when Kconfig is in there things will be different. > > Granted, that's the list of config options defined, not necessarily the > list of options used, but a second variation of the grep/sed/sort might > give you a hint on that. > > Plus, I would love having scripts in tools/ that look for either > defined or used config options. > With this series you kind-of get this feature - you can look at the files it creates along the way. Regards, Simon
_______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot