[TF-M] Re: New Clang/LLVM Toolchain Support Announcement

Hi Bohdan,

TF-M supports ATfE toolchain for a quite some time and ATfE v20.1.0 is present in OpenCI for verification on all levels. Here an example: https://ci.trustedfirmware.org/job/tf-m-build-config/424090/consoleFull

The best, Anton

From: Bohdan.Hunko--- via TF-M tf-m@lists.trustedfirmware.org Sent: Tuesday, February 10, 2026 12:49 PM To: tf-m@lists.trustedfirmware.org Cc: nd nd@arm.com Subject: [TF-M] Re: New Clang/LLVM Toolchain Support Announcement

Hi Anton,

I wanted to clarify what is the state of ATFE compiler in the main branch. Can TFM be built with ATFE? Is ATFE present in TFM CI?

Best regards, Bohdan Hunko

Cypress Semiconductor Ukraine LLC Senior Engineer CSS ICW SW INT BFS SFW Mobile: +380995019714 Bohdan.Hunko@infineon.commailto:Bohdan.Hunko@infineon.com

From: Anton Komlev via TF-M <tf-m@lists.trustedfirmware.orgmailto:tf-m@lists.trustedfirmware.org> Sent: Monday, 20 January 2025 22:03 To: tf-m@lists.trustedfirmware.orgmailto:tf-m@lists.trustedfirmware.org Cc: nd <nd@arm.commailto:nd@arm.com> Subject: [TF-M] New Clang/LLVM Toolchain Support Announcement

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Hello,

I am thrilled to announce the support of new Clan/LLVM toolchain, freely available here: https://github.com/ARM-software/LLVM-embedded-toolchain-for-Arm. This extends a suite of powerful tools designed to enhance your development experience and boost productivity. Key Features:

* Offers Clang frontend * Available for Linux, Windows and macOS * Builds TF-M binaries for all Arm targets * Secure side built without libc and picolib libraries, while both are available to Bootloader and Non-Secure side Important notes:

* Floating point support is not verified * MVE is not supported yet * This has been verified with version v18.1.3 of the toolchain.

We're excited for you to try out the new toolchain support and look forward to your feedback. The use of the toolchain_CLANG.cmake is the same as all other toolchains. I plan to present the new toolchain and compare it with the existing tools in one of the upcoming TF-M forums. Meanwhile I encourage the platform owners to include the new toolchain support using arm platforms as a reference. The relevant changes are in this chain: https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/34351

There is ongoing discussion on the best name for the toolchain to avoid possible confusion. Should it be Clang as now, LLVM, or even LLVMClang? Please share your opinion.

Thanks, and best regards, Anton.