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

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Kconfig definition

At kernel/Kconfig:197

Included via Kconfig:8Kconfig.zephyr:33

Menu path: (Top) → General Kernel Options

config ERRNO
    bool "Enable errno support"
    default y
    select THREAD_USERSPACE_LOCAL_DATA if 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.)