include/config/auto.conf

include/config/auto.conf is a generated file which stores the config values («Kernel configuration») that were used to compile the kernel. These values are typically configured in .config, but can be overridden with make KCONFIG_CONFIG=….

Usage

The content of the file is used for build tools to determine which config options are currently enabled or disabled.

A list of files that use auto.conf can be found with:

grep -rlF include/config/auto.conf

It turns out that in most cases, this file is

included in a Makefile in combination with ifeq ($(CONFIG_…),y) (see for example arch/x86/Makefile.postlink), or
used in a shell script in combination with grep or sed (for example scripts/package/builddeb or scripts/setlocalversion)

Content

The content of the file looks like so:

#
# Automatically generated file; DO NOT EDIT.
# Linux/x86 6.5.0-rc7 Kernel Configuration
#
CONFIG_RING_BUFFER=y
CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
CONFIG_SND_PROC_FS=y
CONFIG_SCSI_DMA=y
CONFIG_TCP_MD5SIG=y
CONFIG_KERNEL_GZIP=y
CONFIG_CC_HAS_SANCOV_TRACE_PC=y
CONFIG_ARCH_WANT_OPTIMIZE_VMEMMAP=y
…

include/config/auto.conf

Usage

Content

See also