Some improvements

Author: antoyo

CONTRIBUTING.md

@@ -31,8 +31,9 @@ We encourage new contributors to join our communication channels and introduce t
 To run specific tests, use appropriate flags such as:
 - `./y.sh test --test-libcore`
 - `./y.sh test --std-tests`
+- `cargo test -- <name of test>`
 
-Additional test running options:
+Additionally, you can run the tests of `libgccjit`:
 ```bash
 # libgccjit tests
 cd gcc-build/gcc
@@ -48,14 +49,14 @@ The project provides several environment variables for debugging:
 - `CG_GCCJIT_DUMP_MODULE`: Dumps a specific module
 - `CG_GCCJIT_DUMP_TO_FILE`: Creates C-like representation
 
-Full list of debugging options can be found in the README.
+Full list of debugging options can be found in the [README](/rust-lang/rustc_codegen_gcc#env-vars).
 
 ## Making Contributions
 
 ### Finding Issues to Work On
-1. Look for issues labeled with `good-first-issue` or `help-wanted`
+1. Look for issues labeled with `good first issue` or `help wanted`
 2. Check the [progress report](https://blog.antoyo.xyz/rustc_codegen_gcc-progress-report-34#state_of_rustc_codegen_gcc) for larger initiatives
-3. Consider improving documentation or investigate [failing tests](https://github.com/rust-lang/rustc_codegen_gcc/tree/master/tests)(except failing-ui-tests12.txt)
+3. Consider improving documentation or investigating [failing tests](https://github.com/rust-lang/rustc_codegen_gcc/tree/master/tests)(except failing-ui-tests12.txt)
 
 ### Pull Request Process
 1. Fork the repository and create a new branch

Readme.md

@@ -15,7 +15,8 @@ A secondary goal is to check if using the gcc backend will provide any run-time
 ## Getting Started
 
 Note: **This requires a patched libgccjit in order to work.
-You need to use my [fork of gcc](https://github.com/antoyo/gcc) which already includes these patches.**
+You need to use my [fork of gcc](https://github.com/rust-lang/gcc) which already includes these patches.**
+The default configuration (see below in the [Quick start](#quick-start) section) will download a pre-built `libgccjit` that already contains these patches, so you don't need to build this fork yourself if you use the default configuration.
 
 ### Dependencies
   - rustup: follow instructions on the [official website](https://rustup.rs)
@@ -53,7 +54,7 @@ to do a few more things.
 To build it (most of these instructions come from [here](https://gcc.gnu.org/onlinedocs/jit/internals/index.html), so don't hesitate to take a look there if you encounter an issue):
 
 ```bash
-$ git clone https://github.com/antoyo/gcc
+$ git clone https://github.com/rust-lang/gcc
 $ sudo apt install flex libmpfr-dev libgmp-dev libmpc3 libmpc-dev
 $ mkdir gcc-build gcc-install
 $ cd gcc-build