sfackler/rust-openssl — pull request #64 by reem (2014-10-05 01:21:38+00:00)
Title: Add a dummy bn_is_zero C dependency to wrap BN_is_zero

This is necessary because on some architectures BN_is_zero
is a CPP macro, so trying to link against it in an `extern "C"`
block causes a linker error.

This also introduces a build command to Cargo to compile
the bn_is_zero wrapper.