error building coreboot

hi,
i am trying to build coreboot according to

https://github.com/bibanon/Coreboot-ThinkPads/wiki/T60p-Build-Coreboot#build...

make crossgcc worked fine.

after running "make" im getting the following error and the building 
process is stopped:
---------
/coreboot/util/cbfstool/cbfs_image.c:451:59: error: comparison between 
signed and unsigned integer expressions [-Werror=sign-compare]
   assert((char*)CBFS_SUBHEADER(entry) - image->buffer.data ==
                                                            ^
cc1: all warnings being treated as errors
make: *** [build/util/cbfstool/cbfs_image.o] Fehler 1
---------

any ideas what is causing this error and how to fix it?

thanks in advance

chp

[Patrick Georgi]

2015-04-28 8:42 GMT+02:00  :
> after running "make" im getting the following error and the building process
> is stopped:
>
> /coreboot/util/cbfstool/cbfs_image.c:451:59: error: comparison between
> signed and unsigned integer expressions [-Werror=sign-compare]
>   assert((char*)CBFS_SUBHEADER(entry) - image->buffer.data ==
>                                                            ^
> cc1: all warnings being treated as errors
> make: *** [build/util/cbfstool/cbfs_image.o] Fehler 1
>
> any ideas what is causing this error and how to fix it?

You're probably building on a 32bit host system, which isn't a
well-tested environment (our autobuilders are 64bit as are, it seems,
most developer machines).
http://review.coreboot.org/#/c/10015/ should fix the issue.

Regards,
Patrick