[Buildroot] [PATCH RFC] Makefile: from a defconfig file, point to the corresponding board/ entry
Yann E. MORIN
yann.morin.1998 at free.fr
Thu Nov 27 17:46:28 UTC 2014
Jérôme, All,
On 2014-11-27 11:26 +0100, Jérôme Pouiller spake thusly:
> On Thursday 27 November 2014 00:13:55 Yann E. MORIN wrote:
> > This is an RFC!
> >
> > When configuring Buildroot from a defconfig files, soem users complain
> > it is non-obvious that the corresponding board documentattion is to be
> > found in the board/ sub-directory.
> >
> > So, deduce the board name from the defconfig file, look for a similarly
> > named sub-dir of board (first level only), and if such a directory
> > exists, print a message stating extra documentation for that board is to
> > be found there.
>
> What about introducing a BR2_BOARD_DIR configuration variable? This variable
> would have two functions:
> - May be used to locate other files (configs, overlays, etc...)
> - If defined, a help message is displayed when this defconfig is loaded.
The problem with using a Kconfig string variable is that Kconfig strgings
that have no prompt can only take their default value, as defined in
Config.in; if there is no default value, then the string option is not
even stored in the .config file.
If we were to have, for example, a Config.in with:
config BR2_BOARD_DIR
string
and we were to seed it with a foo_defconfig file that has:
BR2_BOARD_DIR="$(TOP_DIR)/board/foo"
then calling "make foo_defconfig" would yield an empty .config file.
So, we can not use a Kconfig string variable.
Regards,
Yann E. MORIN.
--
.-----------------.--------------------.------------------.--------------------.
| Yann E. MORIN | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| +33 662 376 056 | Software Designer | \ / CAMPAIGN | ___ |
| +33 223 225 172 `------------.-------: X AGAINST | \e/ There is no |
| http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL | v conspiracy. |
'------------------------------^-------^------------------^--------------------'
More information about the buildroot
mailing list