:orphan:

.. title:: ERRNO_IN_TLS

.. option:: CONFIG_ERRNO_IN_TLS

*Store errno in thread local storage (TLS)*

Type: ``bool``

Help
====

.. code-block:: none

    Use thread local storage to store errno instead of storing it in
    the kernel thread struct. This avoids a syscall if userspace is enabled.

Direct dependencies
===================

\ :option:`ERRNO <CONFIG_ERRNO>` && \ :option:`THREAD_LOCAL_STORAGE <CONFIG_THREAD_LOCAL_STORAGE>`

*(Includes any dependencies from ifs and menus.)*

Default
=======

- y

Kconfig definition
==================



At ``<Zephyr Kernel>/Kconfig:207``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:30``

Menu path: (Top) → General Kernel Options → Enable errno support

.. code-block:: kconfig

    config ERRNO_IN_TLS
    	bool "Store errno in thread local storage (TLS)"
    	default y
    	depends on ERRNO && THREAD_LOCAL_STORAGE
    	help
    	  Use thread local storage to store errno instead of storing it in
    	  the kernel thread struct. This avoids a syscall if userspace is enabled.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*