#rs-libc
This is a subset of libc that can be used with Rust inside SGX. Functions are
added on an as-needed basis.
##errno
`errno` is not supported. Functions that have had `errno` functionality removed:
*`strtod`*`strtof`*`strtoimax`*`strtol`*`strtold`*`strtoll`*`strtoul`*`strtoull`*`strtoumax`