MPLAB XC32

Download and install MPLAB XC32 Compiler for your operating system.
Set these environment variables:
- Set ZEPHYR_TOOLCHAIN_VARIANT to xc32.
- Set XC32_TOOLCHAIN_PATH to the toolchain installation directory.

To check that you have set these variables correctly in your current environment, follow these example shell sessions (the XC32_TOOLCHAIN_PATH values may be different on your system):

# Linux, macOS:
$ echo $ZEPHYR_TOOLCHAIN_VARIANT
xc32
$ echo $XC32_TOOLCHAIN_PATH
/opt/microchip/xc32/v5.00

# Windows:
> echo %ZEPHYR_TOOLCHAIN_VARIANT%
xc32
> echo %XC32_TOOLCHAIN_PATH%
C:\Microchip\xc32\v5.00

For Microchip SoCs, set XC_PACK_DIR to the root directory containing installed Microchip Device Family Packs (DFPs).

Note

Zephyr uses XC_PACK_DIR to find the DFP matching the selected SoC and to pass the required -mdfp and -mprocessor flag to the XC32 toolchain.

For example:
```
# Linux, macOS:
$ export XC_PACK_DIR=/home/path/.packs/microchip

# Windows:
> set XC_PACK_DIR=C:\Users\path\.mchp_packs\Microchip
```