Guide: Install developer tools on macOS

These are the instructions for installing the development tools on macOS. We peppered the installation instructions with Check steps that confirm your progress through the steps. Use each to validate a step before moving on. If you hit a snag, stop and reach out (forum, office hours) and we can help you out!

Install Xcode

To ease the installation process, we are using Homebrew. Homebrew is a popular package manager for OS X.

If you already use Homebrew, skip to the next section; otherwise follow these steps.

Homebrew requires the Xcode command line tools. Install these by running the command below.
```
  $ xcode-select --install
```

Install Homebrew by running the command below.

  $ /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

Check: confirm Homebrew installation

$ brew -v
Homebrew 4.2.0

Fine if your version number is newer.

Install riscv-unknown-elf toolchain

We use a cross-compiler toolchain to compile programs for the Mango Pi.

Install our custom brew formula containing the cross-compile tools.
```
  $ brew install cs107e/cs107e/riscv-gnu-toolchain-13
```

Check: confirm compiler

$ brew info riscv-gnu-toolchain-13
==> cs107e/cs107e/riscv-gnu-toolchain-13: stable 13-2024q1-cs107e
Pre-built RISC-V GNU toolchain for CS107e

$ riscv64-unknown-elf-gcc --version
riscv64-unknown-elf-gcc (gc891d8dc2-dirty) 13.2.0
Copyright (C) 2023 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Install xfel

Xfel was installed as part of the toolchain installation. You can confirm that it is installed by running the command below.

Check: confirm xfel

$ xfel

xfel(v1.3.2) - https://github.com/xboot/xfel
usage:
    xfel version                                        - Show chip version
    xfel hexdump <address> <length>                     - Dumps memory region in hex
    xfel dump <address> <length>                        - Binary memory dump to stdout
    xfel read32 <address>                               - Read 32-bits value from device memory
    xfel write32 <address> <value>                      - Write 32-bits value to device memory
    xfel read <address> <length> <file>                 - Read memory to file
    xfel write <address> <file>                         - Write file to memory
    xfel exec <address>                                 - Call function address
    xfel reset                                          - Reset device using watchdog
    xfel sid                                            - Show sid information
    xfel jtag                                           - Enable jtag debug
    xfel ddr [type]                                     - Initial ddr controller with optional type
    xfel sign <public-key> <private-key> <file>         - Generate ecdsa256 signature file for sha256 of sid
    xfel spinor                                         - Detect spi nor flash
    xfel spinor erase <address> <length>                - Erase spi nor flash
    xfel spinor read <address> <length> <file>          - Read spi nor flash to file
    xfel spinor write <address> <file>                  - Write file to spi nor flash
    xfel spinand                                        - Detect spi nand flash
    xfel spinand erase <address> <length>               - Erase spi nand flash
    xfel spinand read <address> <length> <file>         - Read spi nand flash to file
    xfel spinand write <address> <file>                 - Write file to spi nand flash
    xfel spinand splwrite <split-size> <address> <file> - Write file to spi nand flash with split support
    xfel extra [...]                                    - The extra commands

Installation complete

Nice job! Head back to the main installation guide to do one last set of checks.