[U-Boot] Regarding the config.mk in U-boot TOP directory

[Bedia, Vaibhav]

On Thursday, December 30, 2010 6:51 PM, Asokan, Shyama Trikkadeeri
wrote: 
> Hi Wolfgang,
> I have been facing an issue while building u-boot for AT91SAM9263ek
> board. The environment I am using is CYGWIN and toolchain is the
> Code sourcery toolchain.  
> 
> 
> The make configuration step works fine while "make CROSS_COMPILE "
> step throws the following error: 
> make CROSS_COMPILE=arm-none-linux-gnueabi-
> Generating include/autoconf.mk
> include/common.h:37: fatal error: config.h: No such file or
> directory compilation terminated. 
> Generating include/autoconf.mk.dep
> include/common.h:37: fatal error: config.h: No such file or
> directory compilation terminated. 
> make: *** [include/autoconf.mk.dep] Error 1 While going through the
> files in u-boot I made the following 
> observations:
> 
[...]

I had similar issues some time back but the build environment was not Cygwin.

I was working on adding support for a board on one GIT branch and after building an image (without a distclean) shifted to another branch which didn't have the board support added.

Compiling u-boot for a different board on the second branch threw up errors like you mentioned. Even distclean didn't help. This was probably due to the auto-generated files depending on a board config which wasn't in the branch I was working on.

I was able to finally get things working by manually deleting 
include/config.h, include/config.mk, include/autoconf.mk and include/autoconf.mk.dep

A couple of more instances where I got the errors was when during the course of development directory structure/config filename had to be changed but remnants of a build with old directory structure/config file were present. Again manually deleting the files mentioned above got things working.

Deleting the files manually may not be correct way of fixing this issue but I thought it might help if you are stuck.

Regards,
Vaibhav