I'm downloaded the blackfin-buildroot-2012R2-RC5.tar.bz2. I'm using the uclibc-full buildchain.
I've tried out the bf526-ezbrd_defconfig and that seems to work.
Then I've tried the bf526-ezbrd-fdpic_defconfig and that doesn't seem to work.
I've attached a "make 2>err".
If you disable all libraries in menuconfig (Eg. Speex etc.) it seems to compile.