:orphan:

.. title:: ERRNO

.. option:: CONFIG_ERRNO

*Enable errno support*

Type: ``bool``

Help
====

Enable per-thread errno in the kernel. Application and library code must
include errno.h provided by the C library (libc) to use the errno
symbol. The C library must access the per-thread errno via the
_get_errno() symbol.

Default
=======

- y

Symbols selected by this symbol
===============================

- \ :option:`THREAD_USERSPACE_LOCAL_DATA <CONFIG_THREAD_USERSPACE_LOCAL_DATA>` if \ :option:`USERSPACE <CONFIG_USERSPACE>`

Symbols that select this symbol
===============================

- \ :option:`SIMPLELINK_HOST_DRIVER <CONFIG_SIMPLELINK_HOST_DRIVER>`

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

.. highlight:: kconfig

At ``kernel/Kconfig:196``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:36``

Menu path: (Top) → General Kernel Options

.. parsed-literal::

    config ERRNO
    	bool "Enable errno support"
    	default y
    	select \ :option:`THREAD_USERSPACE_LOCAL_DATA <CONFIG_THREAD_USERSPACE_LOCAL_DATA>` if \ :option:`USERSPACE <CONFIG_USERSPACE>`
    	help
    	  Enable per-thread errno in the kernel. Application and library code must
    	  include errno.h provided by the C library (libc) to use the errno
    	  symbol. The C library must access the per-thread errno via the
    	  _get_errno() symbol.

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