The Industry Reference C++ Compiler

Trusted by hundreds of thousands of C/C++ developers for decades, Arm's CPP Compiler has been used to build code shipped in billions of devices. It enables the development of highly efficient products that best utilize all features of Arm Cortex processors and architectures, from Armv6-M to Armv8-A 64-bit Arm.

Features and Benefits

Architectural Accuracy

Arm's CPP Compiler is developed in close collaboration with Arm’s processor and architecture projects. It provides the earliest, most complete, and most accurate support for the latest Arm cores and architectural extensions.

Real World Performance

Arm Compiler 6 is optimized for a wide range of embedded workloads, not just for a single benchmark. This includes workloads running on either bare metal or an embedded RTOS, where responsiveness is a critical factor.

Smaller Code

Arm Compiler 6 further improves the space-optimizing performance of Arm C/C++ embedded tool chains, particularly for Cortex-M devices. It combines earlier density-enhancing techniques with new link-time optimizations that remove unused and redundant code.

Safety Qualification

Safety experts TÜV SÜD have qualified the safety version of Arm Compiler 6 for several industries including automotive (ISO 26262), for development to the most demanding Safety Integrity Levels. Arm qualified compilers provide the long term stability maintenance needed for modern safety development.

More Features


Arm Compiler 6 is developed alongside the Arm SIMD (Single Instruction Multiple Data) architecture extensions such as Neon and SVE. It contains advanced auto-vectorization support, to drive maximum value from these vector architecture extensions.

Language Support

To keep pace with developer needs, C/C++ language specifications are frequently revised and extended. Arm Compiler 6 provides the advanced language support needed by your developers to exploit new and updated language features.

Hand-Tuned C Libraries

Choice of C libraries optimized by Arm over many years for exceptional performance and code density.

Whole Program Optimization

Innovative inter-module link-time code optimization strategies.

Bare-Metal Package

Tailored for C and C++ development of firmware and real-time OS (RTOS) applications.

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Get Arm Compiler

Access Arm Compiler in the software that is right for you.

Arm Keil MDK
Ideal for projects on microcontrollers
Arm Development Studio
Ideal for projects on any Arm architecture-based SoC
Arm Compiler for Functional Safety
Ideal for stable branch of compiler standalone for functional safety applications
Target Devices
Target Devices Arm Cortex-M* All Arm cores* All Arm cores**
Host Platforms
Host Platforms Windows Windows, Linux Windows, Linux
Safety Qualification Kit
Safety Qualification Kit Yes, in MDK-Pro Yes
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* Supported cores depends upon edition
** Processor support depends upon safety Compiler branch. Get in touch for more information.

Releasing New Safety Toolchain

Arm is releasing a new safety toolchain this Autumn 2021. Whether you are starting a new project or already working on an existing one, we can help you find the right safety toolchain that meets your safety certification needs and timelines.

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Use Cases

Talk with an Expert

Get in touch to learn how Arm Compiler 6 can accelerate your embedded software development.

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