Merge pull request #129 from ids1024/gsoc

GSoC Status Report 2

content/news/gsoc-self-hosting-2.md

++++
+title = "GSoC Project: Making Redox Self-hosting, Status Report 2"
+author = "ids1024"
+date = "2017-07-08 16:52:23-07:00"
++++
+
+As [previously reported](/news/gsoc-self-hosting-1/), I am working on making Redox self hosting for the Google Summer of Code.
+
+# Cargo
+
+Based on how far I was at the time of my last report, I was hoping cargo would be working on Redox by now. But that is not yet the case.
+
+It took a while to find one bug that was interfering with cargo; [an issue with the implementation of `Convdar` on Redox](https://github.com/rust-lang/rust/pull/43082/). The remaining issue seems to be in [jobserver-rs](https://github.com/alexcrichton/jobserver-rs); the modifications I made to it to run on Redox were incorrect. It should be possible to port that properly once Redox has full support for signals and signal handlers.
+
+Cargo also is unable to fetch the registry; I'm not sure why, but hopefully it will work better once Redox switches to a network stack based on [smoltcp](https://github.com/m-labs/smoltcp).
+
+# Symlinks
+
+`symlink()` and `readlink()` are two functions I've had to comment out of C code I've ported, and the `gcc` and `dash` packages needed to use scripts for `/bin/cc` and `/bin/sh` since symlinks weren't available, so it seemed about time to [implement symlinks](https://github.com/redox-os/redoxfs/pull/18). To be able to create symlinks when building Redox, I also had to [make symlinks work in redoxfs's fuse mount](https://github.com/redox-os/redoxfs/pull/20), and [improve support for symlinks in upstream tar-rs](https://github.com/alexcrichton/tar-rs/pull/117).
+
+There were various other small things to address, like adjusting [libstd](https://github.com/redox-os/rust/pull/6) and [newlib](https://github.com/redox-os/newlib/pull/33), and adding a [readlink command](https://github.com/redox-os/coreutils/pull/156).
+
+# Other libc functions
+
+I added the [`getppid()` system call](https://github.com/redox-os/kernel/pull/26) (which was trivial), and [sent a PR](https://github.com/redox-os/newlib/pull/32) adding that function to Redox's newlib, along with `inet_pton()` and `inet_ntop()`. And later I added [`gethostname()`](https://github.com/redox-os/newlib/pull/37). The goal here is mainly to reduce the amount of patching needed for C programs.
+
+# Git
+
+One issue with git was caused by a [bug in Redox's pipe scheme](https://github.com/redox-os/kernel/pull/29). With some dificulty, I managed to create a [recipe for git](https://github.com/redox-os/cookbook/pull/40) that includes support for http(s) via curl; it was somewhat dificult tricking it into finding the dependencies and linking correctly. I added a way to [specify build dependencies](https://github.com/redox-os/cookbook/pull/39) for static libraries needed by C programs in the cookbook, which helps with git since it depends on several libraries.
+
+Git still doesn't work yet.
+
+# Python
+
+I've created an initial [patch and recipe for python](https://github.com/redox-os/cookbook/pull/37), which now runs although it is not fully functional. This was partially because LLVM and Rust require Python to build, so it should be available for full self-hosting; although it looks like they require Python 2... but I makes a good screenshot anyway.
+
+<img class="img-responsive" src="/img/screenshot/redox-python.png"/>