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-rw-r--r--docs/getting_started/build-options.rst6
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/getting_started/build-options.rst b/docs/getting_started/build-options.rst
index 8adf4ad8b..d4eb6a768 100644
--- a/docs/getting_started/build-options.rst
+++ b/docs/getting_started/build-options.rst
@@ -26,6 +26,12 @@ Common build options
``aarch64`` or ``aarch32`` as values. By default, it is defined to
``aarch64``.
+- ``ARM_ARCH_FEATURE``: Optional Arm Architecture build option which specifies
+ one or more feature modifiers. This option has the form ``[no]feature+...``
+ and defaults to ``none``. It translates into compiler option
+ ``-march=armvX[.Y]-a+[no]feature+...``. See compiler's documentation for the
+ list of supported feature modifiers.
+
- ``ARM_ARCH_MAJOR``: The major version of Arm Architecture to target when
compiling TF-A. Its value must be numeric, and defaults to 8 . See also,
*Armv8 Architecture Extensions* and *Armv7 Architecture Extensions* in