IAR Embedded Workbench for Atmel AVR - Library Source 6.21

IAR Embedded Workbench for Atmel AVR – Library Source is an add-on package that provides the full source code for the runtime and standard libraries used by IAR’s AVR toolchain. It lets you inspect, configure, and rebuild the C/C++ libraries to match the exact needs of your AVR application—whether you’re optimizing for size or speed, enabling specific language features, or meeting traceability demands in safety‑critical projects.

Key capabilities:

• Full visibility into the runtime libraries (including DLIB/CLIB and low‑level support routines)
• Rebuildable libraries tailored for tinyAVR, megaAVR, and AVR XMEGA devices
• Fine‑grained control over features such as printf/scanf variants, floating‑point formatting, locale/wide‑char options, and reentrancy
• Easy retargeting of low‑level I/O (e.g., putchar/getchar) to UARTs or custom drivers
• Opportunity to trim unused functionality to minimize flash and RAM usage
• Improved debugging and compliance through source-level inspection and deterministic builds
• Seamless integration with the IAR Embedded Workbench for AVR compiler, assembler, and linker, with ready-to-use build instructions

This package is ideal when you need to customize the standard libraries, achieve maximum code efficiency, or provide auditable evidence of third‑party code used in your firmware.

IAR Embedded Workbench for Atmel AVR - Library Source is developed by IAR Systems. The most popular versions of this product among our users are: 6.5, 6.6, 6.7, 6.8 and 7.1.