Add M1 instructions

BUILDING.md

@@ -1,7 +1,7 @@
 
 # Running on Windows using MSYS2
 
-The following is 
+The following are instructions for building whisper-rs on Windows using the msys2 set of compilers. 
 
 1. install msys2/mingw by following [https://code.visualstudio.com/docs/cpp/config-mingw](`https://code.visualstudio.com/docs/cpp/config-mingw`)
    1. Install g++ and make within msys2 ucrt64
@@ -9,7 +9,7 @@ The following is
    2. Add the msys2 ucrt64 bin folder to path `C:\msys64\ucrt64\bin`
 2. Install make by running `pacman -S make` in msys2 ucrt66
 3. Set rust to use msys2: by running `rustup toolchain install stable-x86_64-pc-windows-gnu` in Windows Powershell/Cmd
-4. Add `.cargo/config` file in the project with the following contents: 
+4. Add `.cargo/config.toml` file in the project with the following contents: 
 ```
 [target.x86_64-pc-windows-gnu]
 linker = "C:\\msys64\\ucrt64\\bin\\gcc.exe"
@@ -27,3 +27,14 @@ Make sure you have installed and in the path:
 - cmake
 
 You may need to clone the git repository instead of using the Cargo package.
+
+# Running on M1 OSX
+
+To build on a M1 Mac, make sure to add the following to your project's `.cargo/config.toml`: 
+
+```
+[target.aarch64-apple-darwin]
+rustflags = "-lc++ -l framework=Accelerate"
+```
+
+See https://github.com/tazz4843/whisper-rs/pull/2 for more information.