Hi all,

I have created patches for these changes - https://review.trustedfirmware.org/q/topic:%22local-libs-patching%22

Best regards,

Bohdan Hunko

Cypress Semiconductor Ukraine LLC

Senior Engineer

CSS ICW SW INT BFS SFW

Mobile: +380995019714
Bohdan.Hunko@infineon.com

From: Bohdan.Hunko--- via TF-M <tf-m@lists.trustedfirmware.org>
Sent: Wednesday, 10 June 2026 19:07
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Cc: Kytsun Hennadiy (CSS ICW SW INT BFS SFW) <Hennadiy.Kytsun@infineon.com>; Kozemchuk Ivan (CSS ICW SW INT BFS SFW) <Ivan.Kozemchuk@infineon.com>
Subject: [TF-M] Local library patching issue

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Hi,

I was trying to build TF-M with local libraries and noticed that patches were not applied in that flow.

I found an issue with fetch_remote_library() when using local library paths instead of downloading the dependency.

The function exposes LIB_FORCE_PATCH, and the documentation says it should control patching when the library source is provided as a local folder. However, in the current implementation this does not really work for local libraries.

We have our Modus Toolbox IDE which builds TFM as part of a project where all the libraries are already cloned, thus we need a way to forca patch local sources.