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Kconfig
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#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#
mainmenu "Nuttx/$ARCH Configuration"
config APPSDIR
string
option env="APPSDIR"
menu "Build Setup"
config EXPERIMENTAL
bool "Prompt for development and/or incomplete code/drivers"
config DEFAULT_SMALL
bool "Default to smallest size"
default n
---help---
When options are present, the default value for certain options will
be the one the results in the smallest size (at a loss of features).
The default is a fuller feature set at a larger size.
NOTE: This option does not prevent you from overriding the default
to select another alternative. Nor does it affect the settings that
have already been selected in your configuration file. This applies
only to new settings that require a default value.
choice
prompt "Build Host Platform"
default HOST_LINUX
config HOST_LINUX
bool "Linux"
config HOST_MACOS
bool "macOS"
config HOST_WINDOWS
bool "Windows"
config HOST_OTHER
bool "Other"
endchoice
config TOOLCHAIN_WINDOWS
bool
default n
depends on HOST_WINDOWS
---help---
Selected internally if the selected Windows environment is compatible
with the use of Windows native toolchains.
choice
prompt "Windows Build Environment"
default WINDOWS_CYGWIN
depends on HOST_WINDOWS
config WINDOWS_NATIVE
bool "Windows Native"
select TOOLCHAIN_WINDOWS
---help---
Build natively in a CMD.exe environment with Windows style paths
(like C:\cgywin\home)
config WINDOWS_CYGWIN
bool "Cygwin"
select TOOLCHAIN_WINDOWS
---help---
Build natively in a Cygwin environment with POSIX style paths (like
/cygdrive/c/Program Files)
config WINDOWS_UBUNTU
bool "Ubuntu under Windows 10"
---help---
Build natively in an Ubuntu shell under Windoes 10 environment with
POSIX style paths (like /mnt/c/Program Files)
config WINDOWS_MSYS
bool "MSYS or MSYS2"
select TOOLCHAIN_WINDOWS
---help---
Build natively in a Cygwin environment with POSIX style paths (like
/cygdrive/c/cgywin/home)
config WINDOWS_OTHER
bool "Windows POSIX-like environment"
select TOOLCHAIN_WINDOWS
---help---
Build natively in another POSIX-like environment. Additional
support may be necessary
endchoice
config WINDOWS_MKLINK
bool "Use mklink"
default n
depends on WINDOWS_NATIVE
---help---
Use the mklink command to set up symbolic links when NuttX is
configured. Otherwise, configuration directories will be copied to
establish the configuration.
If directories are copied, then some confusion can result ("Which
version of the file did I modify?"). In that case, it is recommended
that you re-build using 'make clean_context all'. That will cause the
configured directories to be recopied on each build.
NOTE: This option also (1) that you have administrator privileges, (2)
that you are using Windows 2000 or better, and (3) that you are using
the NTFS file system. Select 'n' is that is not the case.
menu "Build Configuration"
config APPS_DIR
string "Application directory"
default "../apps" if !WINDOWS_NATIVE
default "..\apps" if WINDOWS_NATIVE
---help---
Identifies the directory that builds the
application to link with NuttX. Default: ../apps This symbol must
be assigned to the path to the application build directory
*relative* to the NuttX top build directory. If you had an
application directory and the NuttX directory each in separate
directory trees like this:
build
|-nuttx
| |
| `- Makefile
`-application
|
`- Makefile
Then you would set APPS_DIR=../application.
The application direction must contain Makefile and this make
file must support the following targets:
1)libapps$(LIBEXT) (usually libapps.a). libapps.a is a static
library ( an archive) that contains all of application object
files.
2)clean. Do whatever is appropriate to clean the application
directories for a fresh build.
3)distclean. Clean everything -- auto-generated files, symbolic
links etc. -- so that the directory contents are the same as
the contents in your configuration management system.
This is only done when you change the NuttX configuration.
4)depend. Make or update the application build dependencies.
When this application is invoked it will receive the setting TOPDIR like:
$(MAKE) -C $(CONFIG_APPS_DIR) TOPDIR="$(TOPDIR)" <target>
TOPDIR is the full path to the NuttX directory. It can be used, for
example, to include makefile fragments (e.g., .config or Make.defs)
or to set up include file paths.
choice
prompt "Memory organization"
default BUILD_FLAT
config BUILD_FLAT
bool "Flat address space"
---help---
Build NuttX as one large, executable "blob". All of the code
within the blob can interrupt with all of the other code within
the blob. There are no special privileges, protections, or
restraints.
config BUILD_PROTECTED
bool "NuttX protected build"
depends on ARCH_USE_MPU
select LIB_SYSCALL
select BUILD_2PASS
---help---
Builds NuttX and selected applications as two "blobs": A protected,
privileged kernel blob and a separate unprivileged, user blob. This
requires use of the two pass build with each blob being build on
each pass.
NOTE: This build configuration requires that the platform support
a memory protection unit (MPU). Support, however, may not be
implemented on all platforms.
config BUILD_KERNEL
bool "NuttX kernel build"
depends on ARCH_USE_MMU && ARCH_ADDRENV
select LIB_SYSCALL
---help---
Builds NuttX as a separately compiled kernel. No applications are
built. All user applications must reside in a file system where
they can be loaded into memory for execution.
NOTE: This build configuration requires that the platform support
a memory management unit (MPU) and address environments. Support,
however, may not be implemented on all platforms.
endchoice # Build configuration
config BUILD_2PASS
bool "Two pass build"
default n
depends on !BUILD_KERNEL
---help---
Enables the two pass build options.
Two-pass build options. If the 2 pass build option is selected, then these
options configure the make system build a extra link object. This link object
is assumed to be an incremental (relative) link object, but could be a static
library (archive) (some modification to this Makefile would be required if
PASS1_TARGET generates an archive). Pass 1 1ncremental (relative) link
objects should be put into the processor-specific source directory (where other
link objects will be created). If the pass1 object is an archive, it could
go anywhere.
if BUILD_2PASS
config PASS1_TARGET
string "Pass one target"
default "all"
---help---
The name of the first pass build target. This
can be specific build target, a special build target (all, default, etc.)
or may just be left undefined.
config PASS1_BUILDIR
string "Pass one build directory"
default "build"
---help---
The path, relative to the top NuttX build
directory to directory that contains the Makefile to build the
first pass object. The Makefile must support the following targets:
The special target PASS1_TARGET (if defined)
and the usual depend, clean, and distclean targets.
config PASS1_OBJECT
string "Pass one object"
default ""
---help---
May be used to include an extra, pass1 object
into the final link. This would probably be the object generated
from the PASS1_TARGET. It may be available at link time
in the arch/<architecture>/src directory.
config NUTTX_USERSPACE
hex "Beginning of user-space blob"
default 0x0
depends on BUILD_PROTECTED
---help---
In the kernel build, the NuttX kernel and the user-space blob are
built separately linked objects. NUTTX_USERSPACE provides the
address where the user-space blob is loaded into memory. NuttX will
expect to find and instance of struct userspace_s at this location.
endif # Build 2-pass
endmenu # Build Setup
menu "Binary Output Formats"
config RRLOAD_BINARY
bool "rrload binary format"
default n
---help---
Create nuttx.rr in the rrload binary format used with
BSPs from www.ridgerun.com using the tools/mkimage.sh script.
config INTELHEX_BINARY
bool "Intel HEX binary format"
default n
---help---
Create the nuttx.hex in the Intel HEX binary format that is
used with many different loaders. This option will use the GNU objcopy
program and should not be selected if you are not using the GNU
toolchain.
config MOTOROLA_SREC
bool "Motorola S-Record binary format"
default n
---help---
Create the nuttx.srec in the Motorola S-Record binary format that is
used with many different loaders. This option will use the GNU objcopy
program and should not be selected if you are not using the GNU
toolchain.
config RAW_BINARY
bool "Raw binary format"
default n
---help---
Create the nuttx.bin in the raw binary format that is used with many
different loaders using the GNU objcopy program. This option
should not be selected if you are not using the GNU toolchain.
menuconfig UBOOT_UIMAGE
bool "U-Boot uImage"
select RAW_BINARY
depends on !WINDOWS_NATIVE
---help---
Create the uImage binary used with U-Boot.
if UBOOT_UIMAGE
config UIMAGE_LOAD_ADDRESS
hex "uImage load address"
default 0x0
config UIMAGE_ENTRY_POINT
hex "uImage entry point"
default 0x0
endif
menuconfig DFU_BINARY
bool "DFU binary format"
select RAW_BINARY
---help---
Create the dfu binary used with dfu-utils.
if DFU_BINARY
config DFU_BASE
hex "Address DFU image is loaded to"
config DFU_VID
hex "VID to use for DFU image"
config DFU_PID
hex "PID to use for DFU image"
endif
endmenu # Binary Output Formats
menu "Customize Header Files"
config ARCH_STDINT_H
bool "stdint.h"
default n
---help---
The stdint.h header file can be found at nuttx/include/stdint.h.
However, that header includes logic to redirect the inclusion of an
architecture specific header file like:
#ifdef CONFIG_ARCH_STDINT_H
# include <arch/stdint.h>
#else
...
#endif
Recall that that include path, include/arch, is a symbolic link and
will refer to a version of stdint.h at nuttx/arch/<architecture>/include/stdint.h.
config ARCH_STDBOOL_H
bool "stdbool.h"
default n
---help---
The stdbool.h header file can be found at nuttx/include/stdbool.h.
However, that header includes logic to redirect the inclusion of an
architecture specific header file like:
#ifdef CONFIG_ARCH_STDBOOL_H
# include <arch/stdbool.h>
#else
...
#endif
Recall that that include path, include/arch, is a symbolic link and
will refer to a version of stdbool.h at nuttx/arch/<architecture>/include/stdbool.h.
config ARCH_MATH_H
bool "math.h"
default n
---help---
There is also a re-directing version of math.h in the source tree.
However, it resides out-of-the-way at include/nuttx/lib/math.h because it
conflicts too often with the system math.h. If ARCH_MATH_H=y is
defined, however, the top-level makefile will copy the redirecting
math.h header file from include/nuttx/lib/math.h to include/math.h. math.h
will then include the architecture-specific version of math.h that you
must provide at nuttx/arch/>architecture</include/math.h.
#ifdef CONFIG_ARCH_MATH_H
# include <arch/math.h>
#endif
So for the architectures that define ARCH_MATH_H=y, include/math.h
will be the redirecting math.h header file; for the architectures
that don't select ARCH_MATH_H, the redirecting math.h header file
will stay out-of-the-way in include/nuttx/.
config ARCH_FLOAT_H
bool "float.h"
default n
---help---
The float.h header file defines the properties of your floating
point implementation. It would always be best to use your
toolchain's float.h header file but if none is available, a default
float.h header file will provided if this option is selected. However
there is no assurance that the settings in this float.h are actually
correct for your platform!
config ARCH_STDARG_H
bool "stdarg.h"
default n
---help---
There is also a redirecting version of stdarg.h in the source tree
as well. It also resides out-of-the-way at include/nuttx/lib/stdarg.h.
This is because you should normally use your toolchain's stdarg.h
file. But sometimes, your toolchain's stdarg.h file may have other
header file dependencies and so may not be usable in the NuttX build
environment. In those cases, you may have to create a architecture-
specific stdarg.h header file at nuttx/arch/<architecture>/include/stdarg.h
If ARCH_STDARG_H=y is defined, the top-level makefile will copy the
re-directing stdarg.h header file from include/nuttx/lib/stdarg.h to
include/stdarg.h. So for the architectures that cannot use their
toolchain's stdarg.h file, they can use this alternative by defining
ARCH_STDARG_H=y and providing. If ARCH_STDARG_H, is not defined, then
the stdarg.h header file will stay out-of-the-way in include/nuttx/.
config ARCH_DEBUG_H
bool "debug.h"
default n
---help---
The debug.h contains architecture dependent debugging primitives
endmenu # Customize Header Files
menu "Debug Options"
config DEBUG_ALERT
bool
default n
config DEBUG_FEATURES
bool "Enable Debug Features"
default n
select DEBUG_ALERT
---help---
Enables built-in debug features. Selecting this option will (1) Enable
debug assertions in the code, (2) enable extended parameter testing in
many functions, and (3) enable support for debug output to the SYSLOG.
Note that enabling this option by itself does not produce debug output.
Debug output must also be selected on a subsystem-by-subsystem basis.
if DEBUG_FEATURES
comment "Debug SYSLOG Output Controls"
config DEBUG_ERROR
bool "Enable Error Output"
default n
---help---
Enables output from [a-z]err() statements. Errors are significant system
exceptions that require immediate attention.
config DEBUG_WARN
bool "Enable Warnings Output"
default n
depends on DEBUG_ERROR
---help---
Enables output from [a-z]warn() statements. Warnings are considered to
be various unexpected conditions, potential errors or errors that will
not have serious consequences.
config DEBUG_INFO
bool "Enable Informational Debug Output"
default n
depends on DEBUG_WARN
---help---
Enables verbose "informational" debug output. If you enable
CONFIG_DEBUG_INFO, then very chatty (and often annoying) output
will be generated.
config DEBUG_ASSERTIONS
bool "Enable Debug Assertions"
default n
---help---
Enables the DEBUGASSERT() macro. When CONFIG_DEBUG_ASSERTIONS is
defined, DEBUGASSERT() will cause the system to halt if the
assertion fails. If CONFIG_DEBUG_ASSERTIONS is not defined
DEBUGASSERT() compiled out of the system. In general, you would
set CONFIG_DEBUG_ASSERTIONS=y during debug, but disable the
assertions on a final, buckled up system.
comment "Subsystem Debug Options"
config DEBUG_AUDIO
bool "Audio Device Debug Features"
default n
depends on AUDIO
---help---
Enable audio device debug features.
Enable low level debug features for the audio subsystem and for audio
device drivers. (disabled by default). Support for this debug option
is architecture-specific and may not be available for some MCUs.
if DEBUG_AUDIO
config DEBUG_AUDIO_ERROR
bool "Audio Device Error Output"
default n
depends on DEBUG_ERROR
---help---
Enable audio device error output to SYSLOG.
config DEBUG_AUDIO_WARN
bool "Audio Device Warnings Output"
default n
depends on DEBUG_WARN
---help---
Enable audio device warning output to SYSLOG.
config DEBUG_AUDIO_INFO
bool "Audio Device Informational Output"
default n
depends on DEBUG_INFO
---help---
Enable audio device informational output to SYSLOG.
endif # DEBUG_AUDIO
config DEBUG_BINFMT
bool "Binary Loader Debug Features"
default n
depends on !BINFMT_DISABLE
---help---
Enable binary loader debug features.
if DEBUG_BINFMT
config DEBUG_BINFMT_ERROR
bool "Binary Loader Error Output"
default n
depends on DEBUG_ERROR
---help---
Enable binary loader error output to SYSLOG.
config DEBUG_BINFMT_WARN
bool "Binary Loader Warnings Output"
default n
depends on DEBUG_WARN
---help---
Enable binary loader warning output to SYSLOG.
config DEBUG_BINFMT_INFO
bool "Binary Loader Informational Output"
default n
depends on DEBUG_INFO
---help---
Enable binary loader informational output to SYSLOG.
endif # DEBUG_BINFMT
config DEBUG_CRYPTO
bool "Crypto Debug Features"
default n
depends on CRYPTO
---help---
Enable cryptographic debug features.
if DEBUG_CRYPTO
config DEBUG_CRYPTO_ERROR
bool "Crypto Error Output"
default n
depends on DEBUG_ERROR
---help---
Enable cryptographic error output to SYSLOG.
config DEBUG_CRYPTO_WARN
bool "Crypto Warnings Output"
default n
depends on DEBUG_WARN
---help---
Enable cryptographic warning output to SYSLOG.
config DEBUG_CRYPTO_INFO
bool "Crypto Informational Output"
default n
depends on DEBUG_INFO
---help---
Enable cryptographic informational output to SYSLOG.
endif # DEBUG_CRYPTO
config DEBUG_FS
bool "File System Debug Features"
default n
---help---
Enable file system debug features.
if DEBUG_FS
config DEBUG_FS_ERROR
bool "File System Error Output"
default n
depends on DEBUG_ERROR
---help---
Enable file system error output to SYSLOG.
config DEBUG_FS_WARN
bool "File System Warnings Output"
default n
depends on DEBUG_WARN
---help---
Enable file system warning output to SYSLOG.
config DEBUG_FS_INFO
bool "File System Informational Output"
default n
depends on DEBUG_INFO
---help---
Enable file system informational output to SYSLOG.
endif # DEBUG_FS
config DEBUG_GRAPHICS
bool "Graphics Debug Features"
default n
---help---
Enable NX graphics subsystem debug features.
if DEBUG_GRAPHICS
config DEBUG_GRAPHICS_ERROR
bool "Graphics Error Output"
default n
depends on DEBUG_ERROR
---help---
Enable NX graphics subsystem error output to SYSLOG.
config DEBUG_GRAPHICS_WARN
bool "Graphics Warnings Output"
default n
depends on DEBUG_WARN
---help---
Enable NX graphics subsystem warning output to SYSLOG.
config DEBUG_GRAPHICS_INFO
bool "Graphics Informational Output"
default n
depends on DEBUG_INFO
---help---
Enable NX graphics subsystem informational output to SYSLOG.
endif # DEBUG_GRAPHICS
config DEBUG_LIB
bool "C Library Debug Features"
default n
---help---
Enable C library debug features.
if DEBUG_LIB
config DEBUG_LIB_ERROR
bool "C Library Error Output"
default n
depends on DEBUG_ERROR
---help---
Enable C library error output to SYSLOG.
config DEBUG_LIB_WARN
bool "C Library Warnings Output"
default n
depends on DEBUG_WARN
---help---
Enable C library warning output to SYSLOG.
config DEBUG_LIB_INFO
bool "C Library Informational Output"
default n
depends on DEBUG_INFO
---help---
Enable C library informational output to SYSLOG.
endif # DEBUG_LIB
config DEBUG_MM
bool "Memory Manager Debug Features"
default n
---help---
Enable memory management debug features.
if DEBUG_MM
config DEBUG_MM_ERROR
bool "Memory Manager Error Output"
default n
depends on DEBUG_ERROR
---help---
Enable memory management error output to SYSLOG.
config DEBUG_MM_WARN
bool "Memory Manager Warnings Output"
default n
depends on DEBUG_WARN
---help---
Enable memory management warning output to SYSLOG.
config DEBUG_MM_INFO
bool "Memory Manager Informational Output"
default n
depends on DEBUG_INFO
---help---
Enable memory management informational output to SYSLOG.
endif # DEBUG_MM
config DEBUG_SHM
bool "Shared Memory Debug Output"
default n
depends on MM_SHM
---help---
Enable shared memory management debug SYSLOG output (disabled by default)
config DEBUG_NET
bool "Network Debug Features"
default n
depends on ARCH_HAVE_NET
---help---
Enable network debug features.
if DEBUG_NET
config DEBUG_NET_ERROR
bool "Network Error Output"
default n
depends on DEBUG_ERROR
---help---
Enable network error output to SYSLOG.
config DEBUG_NET_WARN
bool "Network Warnings Output"
default n
depends on DEBUG_WARN
---help---
Enable network warning output to SYSLOG.
config DEBUG_NET_INFO
bool "Network Informational Output"
default n
depends on DEBUG_INFO
---help---
Enable network informational output to SYSLOG.
endif # DEBUG_NET
config DEBUG_POWER
bool "Power-related Debug Features"
default n
---help---
Enable power-related debug features.
if DEBUG_POWER
config DEBUG_POWER_ERROR
bool "Power-related Error Output"
default n
depends on DEBUG_ERROR
---help---
Enable power-related error output to SYSLOG.
config DEBUG_POWER_WARN
bool "Power-related Warnings Output"
default n
depends on DEBUG_WARN
---help---
Enable power-related warning output to SYSLOG.
config DEBUG_POWER_INFO
bool "Power-related Informational Output"
default n
depends on DEBUG_INFO
---help---
Enable power-related informational output to SYSLOG.
endif # DEBUG_POWER
config DEBUG_WIRELESS
bool "Wireless Debug Features"
default n
depends on WIRELESS || DRIVERS_WIRELESS
---help---
Enable wireless debug features.
if DEBUG_WIRELESS
config DEBUG_WIRELESS_ERROR
bool "Wireless Error Output"
default n
depends on DEBUG_ERROR
---help---
Enable wireless error output to SYSLOG.
config DEBUG_WIRELESS_WARN
bool "Wireless Warnings Output"
default n
depends on DEBUG_WARN
---help---
Enable wireless warning output to SYSLOG.
config DEBUG_WIRELESS_INFO
bool "Wireless Informational Output"
default n
depends on DEBUG_INFO
---help---
Enable wireless informational output to SYSLOG.
endif # DEBUG_WIRELESS
config DEBUG_SCHED
bool "Scheduler Debug Features"
default n
---help---
Enable OS scheduler debug features.
if DEBUG_SCHED
config DEBUG_SCHED_ERROR
bool "Scheduler Error Output"
default n
depends on DEBUG_ERROR
---help---
Enable OS scheduler error output to SYSLOG.
config DEBUG_SCHED_WARN
bool "Scheduler Warnings Output"
default n
depends on DEBUG_WARN
---help---
Enable OS scheduler warning output to SYSLOG.
config DEBUG_SCHED_INFO
bool "Scheduler Informational Output"
default n
depends on DEBUG_INFO
---help---
Enable OS scheduler informational output to SYSLOG.
endif # DEBUG_SCHED
config DEBUG_SYSCALL
bool "SYSCALL Debug Features"
default n
depends on LIB_SYSCALL
---help---
Enable very low level features related to system calls. If SYSCAL
output is enabled, this gives you basically a poor man's version of
strace.
if DEBUG_SYSCALL
config DEBUG_SYSCALL_ERROR
bool "SYSCALL Error Output"
default n
depends on DEBUG_ERROR
---help---
Enable OS SYSCALL error output to SYSLOG.
config DEBUG_SYSCALL_WARN
bool "SYSCALL Warnings Output"
default n
depends on DEBUG_WARN
---help---
Enable OS SYSCALL warning output to SYSLOG.
config DEBUG_SYSCALL_INFO
bool "SYSCALL Informational Output"
default n
depends on DEBUG_INFO
---help---
Enable OS SYSCALL informational output to SYSLOG.
endif # DEBUG_SYSCALL
comment "OS Function Debug Options"
config DEBUG_DMA
bool "DMA Debug Features"
default n
depends on ARCH_DMA
---help---
Enable DMA debug features.
Support for this debug option is architecture-specific and may not
be available for some MCUs.
if DEBUG_DMA
config DEBUG_DMA_ERROR
bool "DMA Error Output"
default n
depends on DEBUG_ERROR
---help---
Enable DMA error output to SYSLOG.
config DEBUG_DMA_WARN
bool "DMA Warnings Output"
default n
depends on DEBUG_WARN
---help---
Enable DMA warning output to SYSLOG.
config DEBUG_DMA_INFO
bool "DMA Informational Output"
default n
depends on DEBUG_INFO
---help---
Enable DMA informational output to SYSLOG.
endif # DEBUG_DMA
config DEBUG_IRQ
bool "Interrupt Controller Debug Features"
default n
---help---
Enable interrupt controller debug features.
Some (but not all) architectures support debug output to verify
interrupt controller logic. If supported, then option will enable
that output. This may interfere with normal operations! You
should *not* enable interrupt controller debug unless you suspect
that here is a problem with that logic. On some platforms, this
option may even cause crashes! Use with care!
if DEBUG_IRQ
config DEBUG_IRQ_ERROR
bool "Interrupt Controller Error Output"
default n
depends on DEBUG_ERROR
---help---
Enable interrupt controller error output to SYSLOG.
config DEBUG_IRQ_WARN
bool "Interrupt Controller Warnings Output"
default n
depends on DEBUG_WARN
---help---
Enable interrupt controller warning output to SYSLOG.
config DEBUG_IRQ_INFO
bool "Interrupt Controller Informational Output"
default n
depends on DEBUG_INFO
---help---
Enable interrupt controller informational output to SYSLOG.
endif # DEBUG_IRQ
config DEBUG_PAGING
bool "Paging Debug Features"
default n
depends on PAGING
---help---
Enable OS demand paging debug features.
if DEBUG_PAGING
config DEBUG_PAGING_ERROR
bool "Paging Error Output"
default n
depends on DEBUG_ERROR
---help---
Enable OS demand paging error output to SYSLOG.
config DEBUG_PAGING_WARN
bool "Paging Warnings Output"
default n
depends on DEBUG_WARN
---help---
Enable OS demand paging warning output to SYSLOG.
config DEBUG_PAGING_INFO
bool "Paging Informational Output"
default n
depends on DEBUG_INFO
---help---
Enable OS demand paging informational output to SYSLOG.
endif # DEBUG_PAGING
comment "Driver Debug Options"
config DEBUG_LCD
bool "Low-level LCD Debug Features"
default n
depends on LCD
---help---
Enable LCD driver debug features.
Support for this debug option is board-specific and may not
be available for some boards.
if DEBUG_LCD