Atmel AVR: development platform for PlatformIO

This is a fork that adds support for modern C++ versions and the C++ standard library (freestanding implementation). This makes it possible to use C++26 on AVR.

What Does It Change?

Aside from providing a newer compiler, it makes a few changes to the build flags:

For C++:

• Replaces -std=gnu++11 with -std=gnu++26.
• Removes -fpermissible to encourage better coding practices.
• Adds -Wno-volatile because Arduino framework uses volatile in a now deprecated way.

For C:

• Replaces -std=gnu11 with -std=gnu23.

You can re-enable or disable any flags using build_flags and build_unflags, as usual.

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Atmel AVR 8- and 32-bit MCUs deliver a unique combination of performance, power efficiency and design flexibility. Optimized to speed time to market-and easily adapt to new ones-they are based on the industrys most code-efficient architecture for C and assembly programming.

Documentation related to the upstream platform (platform-atmelavr):

• Home (home page in the PlatformIO Registry)
• Documentation (advanced usage, packages, boards, frameworks, etc.)

Usage

1. Install PlatformIO
2. Create PlatformIO project and configure a platform option in platformio.ini file:

Stable version

[env:stable]
platform = https://github.com/modern-avr/platform.git
board = ...
...

Specific version

[env:v14.2.0]
platform = https://github.com/modern-avr/platform.git#v14.2.0
board = ...
...

Development version

[env:development]
platform = https://github.com/modern-avr/platform.git#develop
board = ...
...

Configuration

Please navigate to documentation of the upstream platform.