# OpenOCD for macOS

This README contains instructions that are specific to macOS.

## Building

There are a few prerequisites you will need first:

- Xcode (install from the AppStore)
- Command Line Tools (install from Xcode -> Preferences -> Downloads)
- One of the following tools:
  - Gentoo Prefix (<https://wiki.gentoo.org/wiki/Project:Prefix/Bootstrap>)
  - Homebrew (<https://brew.sh/>)
  - MacPorts (<https://www.macports.org/install.php>)

If you're building manually you need Texinfo version 5.0 or later. The
simplest way to get it is to use Homebrew (`brew install texinfo`) and
then `export PATH=/usr/local/opt/texinfo/bin:$PATH`.

With Gentoo Prefix you can build the release version or the latest
devel version (-9999) the usual way described in the Gentoo
documentation. Alternatively, install the prerequisites and build
manually from the sources.

With Homebrew you can either run:

```sh
brew install [--HEAD] open-ocd
```

Where ``--HEAD`` asks ``brew`` to install the current Git version instead of the
lastest release.

You can also run:

```sh
brew install libtool automake libusb [hidapi] [libftdi]
```

to install the needed dependencies and then proceed with the manual building
procedure.

For building with MacPorts you need to run:

```sh
sudo port install libtool automake autoconf pkgconfig libusb [libftdi1]
```

You should also specify LDFLAGS and CPPFLAGS to allow `configure` to use
MacPorts' libraries, so run configure like this:

```sh
LDFLAGS=-L/opt/local/lib CPPFLAGS=-I/opt/local/include ./configure [options]
```

See [README](README.md) for the generic building instructions.

If you're using a USB adapter and have a driver kext matched to it,
you will need to unload it prior to running OpenOCD. E.g. with Apple
driver (OS X 10.9 or later) for FTDI run:

```sh
sudo kextunload -b com.apple.driver.AppleUSBFTDI
```

for FTDI vendor driver use:

```sh
sudo kextunload FTDIUSBSerialDriver.kext
```

To learn more on the topic please refer to the official libusb FAQ: <https://github.com/libusb/libusb/wiki/FAQ>