Created attachment 466990 [details] buildlog I think because of this: /usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/../../../../x86_64-pc-linux-gnu/bin/ld: cannot find -lgcc_s see attachments
Created attachment 466992 [details] emergeinfo
This is now fixed in xsb-3.6.0 and xsb-3.7.0. Thanks for reporting this bug.