:orphan:

.. title:: CONFIG_OVERRIDE_FRAME_POINTER_DEFAULT

.. kconfig:: CONFIG_OVERRIDE_FRAME_POINTER_DEFAULT

CONFIG_OVERRIDE_FRAME_POINTER_DEFAULT
#####################################

*Override compiler defaults for -fomit-frame-pointer*

Type: ``bool``

Help
====

.. code-block:: none

    Omitting the frame pointer prevents the compiler from putting the stack
    frame pointer into a register. Saves a few instructions in function
    prologues/epilogues and frees up a register for general-purpose use,
    which can provide good performance improvements on register-constrained
    architectures like x86. On some architectures (including x86) omitting
    frame pointers impedes debugging as local variables are harder to
    locate. At -O1 and above gcc will enable -fomit-frame-pointer
    automatically but only if the architecture does not require if for
    effective debugging.

    Choose Y if you want to override the default frame pointer behavior
    of your compiler, otherwise choose N.

Defaults
========

No defaults. Implicitly defaults to ``n``.

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



At ``<Zephyr Subsystem>/debug/Kconfig:270``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:44`` → ``<Zephyr Subsystem>/Kconfig:17``

Menu path: (Top) → Sub Systems and OS Services → Debugging Options

.. code-block:: kconfig

    config OVERRIDE_FRAME_POINTER_DEFAULT
    	bool "Override compiler defaults for -fomit-frame-pointer"
    	help
    	  Omitting the frame pointer prevents the compiler from putting the stack
    	  frame pointer into a register. Saves a few instructions in function
    	  prologues/epilogues and frees up a register for general-purpose use,
    	  which can provide good performance improvements on register-constrained
    	  architectures like x86. On some architectures (including x86) omitting
    	  frame pointers impedes debugging as local variables are harder to
    	  locate. At -O1 and above gcc will enable -fomit-frame-pointer
    	  automatically but only if the architecture does not require if for
    	  effective debugging.
	  
    	  Choose Y if you want to override the default frame pointer behavior
    	  of your compiler, otherwise choose N.

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