I created a branch for Intel BID library at
svn://gcc.gnu.org/svn/gcc/branches/libbid
and synced it with mainline at revision 126175. The only differences
are a new top level directory, libbid which contains Intel BID
library, and a libgcc2 patch I am enclosing it here. I tested it on
Linux/ia32 and Linux/x86-64 with default languages. It only affects
Linux/ia32 and Linux/x86-64 since they are the only targets which
use BID for DFP. Could maintainers for x86, libgcc and build machinery
take a look at the libbid branch?