Arm Toolchain for Embedded
Arm Toolchain for Embedded is a free, open-source C/C++ toolchain for building products based on Arm designs.
What Arm Toolchain for Embedded is
Arm Toolchain for Embedded is a free, open-source C/C++ toolchain for building products based on Arm designs. It includes Clang compiler drivers and front ends, the LLVM LLD linker, LLVM archiving and coverage tools, and DWA. Arm highlights performance work for AArch64 and Armv8.1-M projects, newer Arm processors, and GNU Embedded Toolchain compatibility. Listed architecture classes are Application, Real-time, and Microcontroller, with targets including Armv7-A, Armv8-A through Armv8.9-A, Armv9-A through Armv9.6-A, Armv7-R, and Armv8-R. Makefiles, GNU-style linker scripts, and Semihosting are supported. Arm says GCC compatibility is not complete, and projects using Arm Compiler 6 scatter files require migration. The free edition is downloaded through GitHub and uses community support. Professional and FuSa editions require eligible User-Based Licenses; FuSa is safety-qualified and expected in 2027.
Good
- 100% open-source free edition
- Clang and LLVM toolchain components
- Supports listed Armv7 through Armv9 targets
- GNU-style linker scripts
- GitHub download for free edition
Watch out
- Pre-Cortex architectures are unsupported
- GCC compatibility is incomplete
- Scatter-file projects require migration
- Free edition relies on community support
Who it suits
It suits embedded developers targeting supported Arm application, real-time, or microcontroller architectures. Projects needing AArch64 optimization or newer Arm processors are specifically identified as candidates.
Verdict
Arm Toolchain for Embedded offers a no-cost, open-source route for supported Arm development. Teams moving from GCC or Arm Compiler 6 should account for compatibility and linker-script migration requirements.
Plans and prices
From Arm Toolchain for Embedded's own pricing page, checked 8 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Arm Toolchain for Embedded | Free | 100% open source · community support · download via GitHub |
| Arm Toolchain for Embedded FuSa | Priced on request | Safety-qualified edition · expected 2027 · enabled by eligible user-based licenses |
| Arm Toolchain for Embedded Professional | Priced on request | Professional support from Arm · enabled by eligible user-based licenses · download via Product Download Hub |
The facts
Each one read from Arm Toolchain for Embedded's own pages, with the date it was checked.
What it does
- Architecture limit
- The listed support excludes pre-Cortex architectures, including Armv6 and earlier.checked 8 Oct 2026
- Compiler and linker
- The listed components include Clang compiler front ends and the LLVM LLD linker.checked 8 Oct 2026
- Components
- The toolchain includes Clang C/C++ drivers and front ends, LLVM linkers, and other tools such as the llvm-ar archiver.checked 8 Oct 2026
- Downloads
- The free edition is downloaded via GitHub, while the Professional edition is downloaded via Arm Product Download Hub.checked 8 Oct 2026
- FuSa edition
- The FuSa edition is described as safety-qualified, with code isolated from upstream changes and downstream patches for safety-related defect fixes; it is expected in 2027.checked 8 Oct 2026
- GNU compatibility
- It supports GNU-ld linker scripts, though Arm says it is not fully compatible with GCC and migration may require project changes.checked 8 Oct 2026
- Intended users
- Arm identifies high-performance embedded projects, including projects needing AArch64 optimization or newer Arm architecture support, as candidates for the toolchain.checked 8 Oct 2026
- License requirements
- Professional and FuSa editions require a User-Based License and are not available through older NL/FL license technology or standalone licenses.checked 8 Oct 2026
- Migration limit
- Projects using Arm Compiler for Embedded 6 scatter files require migration because this toolchain uses GNU-ld linker scripts.checked 8 Oct 2026
- Open source
- The Arm Toolchain for Embedded edition is described as 100% open source and free to use.checked 8 Oct 2026
- Optimization
- Arm describes the toolchain as focused on performance for AArch64 and Armv8.1-M projects.checked 8 Oct 2026
- Professional edition
- The Professional edition adds professional support and is enabled by User-Based Licenses for Keil MDK 6, Arm Development Studio, and Arm Success Kits.checked 8 Oct 2026
- Purpose
- Arm Toolchain for Embedded is an open-source embedded C/C++ compilation toolchain for developing high-performance products based on Arm designs.checked 8 Oct 2026
- Redistribution
- Projects that link the C library have obligations to retain open-source copyright statements and license information.checked 8 Oct 2026
- Support
- Arm provides support only for the Professional and FuSa editions; other editions rely on community support.checked 8 Oct 2026
- Supported architectures
- The product page lists Application, Real-time, and Microcontroller architecture classes, and says pre-Cortex architectures (Armv6 and earlier) are not supported.checked 8 Oct 2026
- Target use cases
- Arm identifies AArch64 performance optimization, newer Arm processors, and GNU Embedded Toolchain compatibility as reasons to consider the toolchain.checked 8 Oct 2026
- Toolchain integrations
- Arm says the toolchain is highly compatible with the GNU Embedded Toolchain and uses GNU-style linker scripts, but migration from Arm Compiler 6 scatter files is required.checked 8 Oct 2026
- Usage telemetry
- The Professional edition can collect usage telemetry locally for administration; Arm says it has no access to that information.checked 8 Oct 2026
The company
- Company headquarters
- Arm lists its global headquarters at 110 Fulbourn Road, Cambridge, UK, CB1 9NJ.checked 8 Oct 2026
- Company history
- Arm says it was established in 1990 as a joint venture between Acorn Computers, Apple Computer, and VLSI Technology.checked 8 Oct 2026
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