Building the newest RTEMS error: Invalid BSP

[my s]

Hello,Everyone.
I'm a student interested in RTEMS gsoc2010 project.
And I build the toolchain of sparc for RTEMS and build rtems-4.9.4
successfully by following the "GSoC Getting Started" page .
Then I checked out the newest RTEMS source code and built it,
but this time it complains the sis bsp is invalid.

I found the "sis.cfg" which located in "$RTEMS_SRC_HOME/make/custom"
now goes to
"$RTEMS_SRC_HOME/src/lib/libbsp/sparc/erc32/make/custom/sis.cfg".
And this leads to the configure script can't find sis.cfg in the right
place.
Is this a bug or I lose some steps during the build?

Thank you a lot. :)
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