openwrt/Config.in

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# Copyright (C) 2006-2012 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
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#
mainmenu "OpenWrt Configuration"
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config MODULES
bool
default y
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config HAVE_DOT_CONFIG
bool
default y
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source "target/Config.in"
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menu "Target Images"
menuconfig TARGET_ROOTFS_INITRAMFS
bool "ramdisk"
default y if USES_INITRAMFS
help
Embed the rootfs into the kernel (initramfs)
choice
prompt "Compression"
default TARGET_INITRAMFS_COMPRESSION_LZMA if TARGET_ar71xx
default TARGET_INITRAMFS_COMPRESSION_LZMA if TARGET_ramips
default TARGET_INITRAMFS_COMPRESSION_NONE
depends on TARGET_ROOTFS_INITRAMFS
help
Select ramdisk compression.
config TARGET_INITRAMFS_COMPRESSION_NONE
bool "none"
config TARGET_INITRAMFS_COMPRESSION_GZIP
bool "gzip"
config TARGET_INITRAMFS_COMPRESSION_BZIP2
bool "bzip2"
config TARGET_INITRAMFS_COMPRESSION_LZMA
bool "lzma"
config TARGET_INITRAMFS_COMPRESSION_LZO
bool "lzo"
config TARGET_INITRAMFS_COMPRESSION_XZ
bool "xz"
endchoice
config EXTERNAL_CPIO
string
prompt "Use external cpio" if TARGET_ROOTFS_INITRAMFS
default ""
help
Kernel uses specified external cpio as INITRAMFS_SOURCE
comment "Root filesystem archives"
config TARGET_ROOTFS_CPIOGZ
bool "cpio.gz"
default y if USES_CPIOGZ
help
Build a compressed cpio archive of the the root filesystem
config TARGET_ROOTFS_TARGZ
bool "tar.gz"
default y if USES_TARGZ
help
Build a compressed tar archive of the the root filesystem
comment "Root filesystem images"
config TARGET_ROOTFS_EXT4FS
bool "ext4"
default y if USES_EXT4
help
Ext4 file system with some free space for uml images
config TARGET_ROOTFS_ISO
bool "iso"
default n
depends on TARGET_x86_generic
help
Create some bootable ISO image
config TARGET_ROOTFS_JFFS2
bool "jffs2"
default y if USES_JFFS2
help
Build a jffs2 root filesystem
config TARGET_ROOTFS_JFFS2_NAND
bool "jffs2 for NAND"
default y if USES_JFFS2_NAND
depends on USES_JFFS2_NAND
help
Build a jffs2 root filesystem for NAND flash
config TARGET_ROOTFS_SQUASHFS
bool "squashfs"
default y if USES_SQUASHFS
help
Build a squashfs-lzma root filesystem
config TARGET_ROOTFS_UBIFS
bool "ubifs"
default y if USES_UBIFS
depends on USES_UBIFS
help
Build a ubifs root filesystem
comment "Image Options"
source "target/linux/*/image/Config.in"
config TARGET_ROOTFS_PARTSIZE
int "Root filesystem partition size (in MB)"
depends on X86_GRUB_IMAGES || TARGET_ROOTFS_EXT4FS || TARGET_rb532
default 48
help
Allows you to change the root filesystem partition size
config TARGET_ROOTFS_MAXINODE
int "Maximum number of inodes in root filesystem"
depends on TARGET_ROOTFS_EXT4FS
default 6000
help
Allows you to change the maximum number of inodes in the root filesystem
config TARGET_ROOTFS_RESERVED_PCT
int "Percentage of reserved blocks in root filesystem"
depends on TARGET_ROOTFS_EXT4FS
default 0
help
Allows you to change the percentage of reserved blocks in the root filesystem
endmenu
menu "Global build settings"
config ALL
bool "Select all packages by default"
default n
comment "General build options"
config DISPLAY_SUPPORT
bool "Show packages that require graphics support (local or remote)"
default n
config BUILD_PATENTED
default y
bool "Compile with support for patented functionality"
help
When this option is disabled, software which provides patented functionality will not be built.
In case software provides optional support for patented functionality,
this optional support will get disabled for this package.
config BUILD_NLS
default n
bool "Compile with full language support"
help
When this option is enabled, packages are built with the full versions of iconv and GNU gettext
instead of the default OpenWrt stubs. If uClibc is used, it is also built with locale support.
config BUILD_STATIC_TOOLS
default n
bool "Attempt to link host utilities statically"
help
Linking host utilities like sed or firmware-utils statically increases the portability of the
generated ImageBuilder and SDK tarballs, however it may fail on some Linux distributions.
config SHADOW_PASSWORDS
bool
prompt "Enable shadow password support"
default y
help
Enable shadow password support.
config CLEAN_IPKG
bool
prompt "Remove ipkg/opkg status data files in final images"
default n
help
This removes all ipkg/opkg status data files from the target directory before building the root fs
config COLLECT_KERNEL_DEBUG
bool
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prompt "Collect kernel debug information"
select KERNEL_DEBUG_INFO
default n
help
This collects debugging symbols from the kernel and all compiled modules.
Useful for release builds, so that kernel issues can be debugged offline later.
comment "Kernel build options"
config KERNEL_DEBUG_FS
bool "Compile the kernel with Debug FileSystem enabled"
default y
help
debugfs is a virtual file system that kernel developers use to put
debugging files into. Enable this option to be able to read and
write to these files.
config KERNEL_PERF_EVENTS
bool
default n
config KERNEL_PROFILING
bool "Compile the kernel with profiling enabled"
default n
select KERNEL_PERF_EVENTS
help
Enable the extended profiling support mechanisms used by profilers such
as OProfile.
config KERNEL_KALLSYMS
bool "Compile the kernel with symbol table information"
default y
help
This will give you more information in stack traces from kernel oopses
config KERNEL_FTRACE
bool "Compile the kernel with tracing support"
default n
config KERNEL_FTRACE_SYSCALLS
bool "Trace system calls"
depends on KERNEL_FTRACE
default n
config KERNEL_ENABLE_DEFAULT_TRACERS
bool "Trace process context switches and events"
depends on KERNEL_FTRACE
default n
config KERNEL_DEBUG_KERNEL
bool
default n
config KERNEL_DEBUG_INFO
bool "Compile the kernel with debug information"
default y
select KERNEL_DEBUG_KERNEL
help
This will compile your kernel and modules with debug information.
config KERNEL_DEBUG_LL_UART_NONE
bool
default n
depends on arm
config KERNEL_DEBUG_LL
bool
default n
depends on arm
select KERNEL_DEBUG_LL_UART_NONE
help
ARM low level debugging
config KERNEL_EARLY_PRINTK
bool "Compile the kernel with early printk"
default n
depends on arm
select KERNEL_DEBUG_KERNEL
select KERNEL_DEBUG_LL if arm
help
Compile the kernel with early printk support.
This is only useful for debugging purposes to send messages
over the serial console in early boot.
Enable this to debug early boot problems.
config KERNEL_AIO
bool "Compile the kernel with asynchronous IO support"
default n
config KERNEL_DIRECT_IO
bool "Compile the kernel with direct IO support"
default n
config KERNEL_MAGIC_SYSRQ
bool "Compile the kernel with SysRq support"
default y
config KERNEL_COREDUMP
bool
config KERNEL_ELF_CORE
bool "Enable process core dump support"
select KERNEL_COREDUMP
default y
config KERNEL_PROVE_LOCKING
bool "Enable kernel lock checking"
select KERNEL_DEBUG_KERNEL
default n
config KERNEL_PRINTK_TIME
bool "Enable printk timestamps"
default y
config KERNEL_RELAY
bool
config KERNEL_KEXEC
bool "Enable kexec support"
#
# CGROUP support symbols
#
config KERNEL_CGROUPS
bool "Enable kernel cgroups"
default n
if KERNEL_CGROUPS
config KERNEL_CGROUP_DEBUG
bool "Example debug cgroup subsystem"
default n
help
This option enables a simple cgroup subsystem that
exports useful debugging information about the cgroups
framework.
config KERNEL_FREEZER
bool
default y if KERNEL_CGROUP_FREEZER
config KERNEL_CGROUP_FREEZER
bool "Freezer cgroup subsystem"
default n
help
Provides a way to freeze and unfreeze all tasks in a
cgroup.
config KERNEL_CGROUP_DEVICE
bool "Device controller for cgroups"
default y
help
Provides a cgroup implementing whitelists for devices which
a process in the cgroup can mknod or open.
config KERNEL_CPUSETS
bool "Cpuset support"
default n
help
This option will let you create and manage CPUSETs which
allow dynamically partitioning a system into sets of CPUs and
Memory Nodes and assigning tasks to run only within those sets.
This is primarily useful on large SMP or NUMA systems.
config KERNEL_PROC_PID_CPUSET
bool "Include legacy /proc/<pid>/cpuset file"
default n
depends on KERNEL_CPUSETS
config KERNEL_CGROUP_CPUACCT
bool "Simple CPU accounting cgroup subsystem"
default n
help
Provides a simple Resource Controller for monitoring the
total CPU consumed by the tasks in a cgroup.
config KERNEL_RESOURCE_COUNTERS
bool "Resource counters"
default n
help
This option enables controller independent resource accounting
infrastructure that works with cgroups.
config KERNEL_MM_OWNER
bool
default y if KERNEL_MEMCG
config KERNEL_MEMCG
bool "Memory Resource Controller for Control Groups"
default n
depends on KERNEL_RESOURCE_COUNTERS
help
Provides a memory resource controller that manages both anonymous
memory and page cache. (See Documentation/cgroups/memory.txt)
Note that setting this option increases fixed memory overhead
associated with each page of memory in the system. By this,
20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
usage tracking struct at boot. Total amount of this is printed out
at boot.
Only enable when you're ok with these trade offs and really
sure you need the memory resource controller. Even when you enable
this, you can set "cgroup_disable=memory" at your boot option to
disable memory resource controller and you can avoid overheads.
(and lose benefits of memory resource controller)
This config option also selects MM_OWNER config option, which
could in turn add some fork/exit overhead.
config KERNEL_MEMCG_SWAP
bool "Memory Resource Controller Swap Extension"
default n
depends on KERNEL_MEMCG
help
Add swap management feature to memory resource controller. When you
enable this, you can limit mem+swap usage per cgroup. In other words,
when you disable this, memory resource controller has no cares to
usage of swap...a process can exhaust all of the swap. This extension
is useful when you want to avoid exhaustion swap but this itself
adds more overheads and consumes memory for remembering information.
Especially if you use 32bit system or small memory system, please
be careful about enabling this. When memory resource controller
is disabled by boot option, this will be automatically disabled and
there will be no overhead from this. Even when you set this config=y,
if boot option "swapaccount=0" is set, swap will not be accounted.
Now, memory usage of swap_cgroup is 2 bytes per entry. If swap page
size is 4096bytes, 512k per 1Gbytes of swap.
config KERNEL_MEMCG_SWAP_ENABLED
bool "Memory Resource Controller Swap Extension enabled by default"
default n
depends on KERNEL_MEMCG_SWAP
help
Memory Resource Controller Swap Extension comes with its price in
a bigger memory consumption. General purpose distribution kernels
which want to enable the feature but keep it disabled by default
and let the user enable it by swapaccount boot command line
parameter should have this option unselected.
For those who want to have the feature enabled by default should
select this option (if, for some reason, they need to disable it
then swapaccount=0 does the trick).
config KERNEL_MEMCG_KMEM
bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)"
default n
depends on KERNEL_MEMCG
help
The Kernel Memory extension for Memory Resource Controller can limit
the amount of memory used by kernel objects in the system. Those are
fundamentally different from the entities handled by the standard
Memory Controller, which are page-based, and can be swapped. Users of
the kmem extension can use it to guarantee that no group of processes
will ever exhaust kernel resources alone.
config KERNEL_PERF_EVENTS
bool
default y if KERNEL_CGROUP_PERF
config KERNEL_CGROUP_PERF
bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
default n
help
This option extends the per-cpu mode to restrict monitoring to
threads which belong to the cgroup specified and run on the
designated cpu.
menuconfig KERNEL_CGROUP_SCHED
bool "Group CPU scheduler"
default n
help
This feature lets CPU scheduler recognize task groups and control CPU
bandwidth allocation to such task groups. It uses cgroups to group
tasks.
if KERNEL_CGROUP_SCHED
config KERNEL_FAIR_GROUP_SCHED
bool "Group scheduling for SCHED_OTHER"
default n
config KERNEL_CFS_BANDWIDTH
bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
default n
depends on KERNEL_FAIR_GROUP_SCHED
help
This option allows users to define CPU bandwidth rates (limits) for
tasks running within the fair group scheduler. Groups with no limit
set are considered to be unconstrained and will run with no
restriction.
See tip/Documentation/scheduler/sched-bwc.txt for more information.
config KERNEL_RT_GROUP_SCHED
bool "Group scheduling for SCHED_RR/FIFO"
default n
help
This feature lets you explicitly allocate real CPU bandwidth
to task groups. If enabled, it will also make it impossible to
schedule realtime tasks for non-root users until you allocate
realtime bandwidth for them.
endif
config KERNEL_BLK_CGROUP
bool "Block IO controller"
default y
help
Generic block IO controller cgroup interface. This is the common
cgroup interface which should be used by various IO controlling
policies.
Currently, CFQ IO scheduler uses it to recognize task groups and
control disk bandwidth allocation (proportional time slice allocation)
to such task groups. It is also used by bio throttling logic in
block layer to implement upper limit in IO rates on a device.
This option only enables generic Block IO controller infrastructure.
One needs to also enable actual IO controlling logic/policy. For
enabling proportional weight division of disk bandwidth in CFQ, set
CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
CONFIG_BLK_DEV_THROTTLING=y.
config KERNEL_DEBUG_BLK_CGROUP
bool "Enable Block IO controller debugging"
default n
depends on KERNEL_BLK_CGROUP
help
Enable some debugging help. Currently it exports additional stat
files in a cgroup which can be useful for debugging.
config KERNEL_NET_CLS_CGROUP
bool "Control Group Classifier"
default y
config KERNEL_NETPRIO_CGROUP
bool "Network priority cgroup"
default y
endif
#
# Namespace support symbols
#
config KERNEL_NAMESPACES
bool "Enable kernel namespaces"
default n
if KERNEL_NAMESPACES
config KERNEL_UTS_NS
bool "UTS namespace"
default y
help
In this namespace tasks see different info provided
with the uname() system call
config KERNEL_IPC_NS
bool "IPC namespace"
default y
help
In this namespace tasks work with IPC ids which correspond to
different IPC objects in different namespaces.
config KERNEL_USER_NS
bool "User namespace (EXPERIMENTAL)"
default y
help
This allows containers, i.e. vservers, to use user namespaces
to provide different user info for different servers.
config KERNEL_PID_NS
bool "PID Namespaces"
default y
help
Support process id namespaces. This allows having multiple
processes with the same pid as long as they are in different
pid namespaces. This is a building block of containers.
config KERNEL_NET_NS
bool "Network namespace"
default y
help
Allow user space to create what appear to be multiple instances
of the network stack.
endif
#
# LXC related symbols
#
config KERNEL_LXC_MISC
bool "Enable miscellaneous LXC related options"
default n
if KERNEL_LXC_MISC
config KERNEL_DEVPTS_MULTIPLE_INSTANCES
bool "Support multiple instances of devpts"
default y
help
Enable support for multiple instances of devpts filesystem.
If you want to have isolated PTY namespaces (eg: in containers),
say Y here. Otherwise, say N. If enabled, each mount of devpts
filesystem with the '-o newinstance' option will create an
independent PTY namespace.
config KERNEL_POSIX_MQUEUE
bool "POSIX Message Queues"
default n
help
POSIX variant of message queues is a part of IPC. In POSIX message
queues every message has a priority which decides about succession
of receiving it by a process. If you want to compile and run
programs written e.g. for Solaris with use of its POSIX message
queues (functions mq_*) say Y here.
POSIX message queues are visible as a filesystem called 'mqueue'
and can be mounted somewhere if you want to do filesystem
operations on message queues.
endif
comment "Package build options"
config DEBUG
bool
prompt "Compile packages with debugging info"
default n
help
Adds -g3 to the CFLAGS
config IPV6
bool
prompt "Enable IPv6 support in packages"
default y
help
Enable IPV6 support in packages (passes --enable-ipv6 to configure scripts).
config PKG_BUILD_PARALLEL
bool
prompt "Compile certain packages parallelized"
default y
help
This adds a -jX option to certain packages that are known to
behave well for parallel build. By default the package make processes
use the main jobserver, in which case this option only takes effect
when you add -jX to the make command.
If you are unsure, select N.
config PKG_BUILD_USE_JOBSERVER
bool
prompt "Use top-level make jobserver for packages"
depends on PKG_BUILD_PARALLEL
default y
help
This passes the main make process jobserver fds to package builds,
enabling full parallelization across different packages
Note that disabling this may overcommit CPU resources depending on the
-j level of the main make process, the number of package
submake jobs selected below and the number of actual CPUs present.
Example: If the main make is passed a -j4 and the submake -j
is also set to 4, we may end up with 16 parallel make processes
in the worst case.
config PKG_BUILD_JOBS
int
prompt "Number of package submake jobs (2-512)"
range 2 512
default 2
depends on PKG_BUILD_PARALLEL && !PKG_BUILD_USE_JOBSERVER
help
The number of jobs (-jX) to pass to packages submake.
config PKG_DEFAULT_PARALLEL
bool
prompt "Parallelize the default package build rule (May break build)"
depends on PKG_BUILD_PARALLEL
depends on BROKEN
default n
help
Always set the default package build rules to parallel build.
WARNING: This may break build or kill your cat, as it builds
packages with multiple jobs that are probably not tested in
a parallel build environment.
Only say Y, if you don't mind fixing broken packages.
Before reporting build bugs, set this to N and re-run the build.
comment "Stripping options"
choice
prompt "Binary stripping method"
default USE_STRIP if EXTERNAL_TOOLCHAIN
default USE_STRIP if USE_GLIBC || USE_EGLIBC || USE_MUSL
default USE_SSTRIP
help
Select the binary stripping method you wish to use.
config NO_STRIP
bool "none"
help
This will install unstripped binaries (useful for native compiling/debugging)
config USE_STRIP
bool "strip"
help
This will install binaries stripped using strip from binutils
config USE_SSTRIP
bool "sstrip"
depends on !DEBUG
depends on !USE_GLIBC
depends on !USE_EGLIBC
help
This will install binaries stripped using sstrip
endchoice
config STRIP_ARGS
string
prompt "Strip arguments"
depends on USE_STRIP
default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
default "--strip-all"
help
Specifies arguments passed to the strip command when stripping binaries
config STRIP_KERNEL_EXPORTS
bool "Strip unnecessary exports from the kernel image"
help
Reduces kernel size by stripping unused kernel exports from the kernel image
Note that this might make the kernel incompatible with any kernel modules that
were not selected at the time the kernel image was created
config USE_MKLIBS
bool "Strip unnecessary functions from libraries"
help
Reduces libraries to only those functions that are necessary for using all
selected packages (including those selected as <M>)
Note that this will make the system libraries incompatible with most of the packages
that are not selected during the build process
choice
prompt "Preferred standard C++ library"
default USE_LIBSTDCXX if USE_EGLIBC
default USE_UCLIBCXX
help
Select the preferred standard C++ library for all packages that support this.
config USE_UCLIBCXX
bool "uClibc++"
config USE_LIBSTDCXX
bool "libstdc++"
endchoice
endmenu
menuconfig DEVEL
bool "Advanced configuration options (for developers)"
default n
config BROKEN
bool "Show broken platforms / packages" if DEVEL
default n
config DOWNLOAD_FOLDER
string "Download folder" if DEVEL
default ""
config LOCALMIRROR
string "Local mirror for source packages" if DEVEL
default ""
config AUTOREBUILD
bool "Automatic rebuild of packages" if DEVEL
default y
help
Automatically rebuild packages when their files change
config BUILD_SUFFIX
string "Build suffix to append to the BUILD_DIR variable" if DEVEL
default ""
help
Build suffix to append to the BUILD_DIR variable, i.e: build_dir_suffix
config TARGET_ROOTFS_DIR
string "Override the default TARGET_ROOTFS_DIR variable" if DEVEL
default ""
help
Override the default TARGET_ROOTFS_DIR variable content $(BUILD_DIR) with custom path.
Use this option to re-define the location of the target root file system directory.
config CCACHE
bool "Use ccache" if DEVEL
default n
help
Compiler cache; see http://ccache.samba.org/
config EXTERNAL_KERNEL_TREE
string "Use external kernel tree" if DEVEL
default ""
config KERNEL_GIT_CLONE_URI
string "Enter git repository to clone" if DEVEL
default ""
help
Enter the full git repository path i.e.:
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
This will create a git clone of the kernel in your build
directory.
config KERNEL_GIT_LOCAL_REPOSITORY
string "Enter path to local reference repository" if DEVEL
default ""
help
Enter a full pathname to a local reference git repository.
In this instance, the --refererence option of git clone will
be used thus creating a quick local clone of your repo.
config BUILD_LOG
bool "Enable log files during build process" if DEVEL
help
If enabled log files will be written to the ./log directory
config SRC_TREE_OVERRIDE
bool "Enable package source tree override" if DEVEL
help
If enabled, you can force a package to use a git tree as source
code instead of the normal tarball. Create a symlink 'git-src'
in the package directory, pointing to the .git tree that you want
to pull the source code from
menuconfig TARGET_OPTIONS
bool "Target Options" if DEVEL
config TARGET_OPTIMIZATION
string "Target Optimizations" if TARGET_OPTIONS
default DEFAULT_TARGET_OPTIMIZATION
help
Optimizations to use when building for the target host.
config SOFT_FLOAT
bool "Use software floating point by default" if TARGET_OPTIONS
default y
depends on (arm || armeb || powerpc || mipsel || mips || mips64el || mips64) && !HAS_FPU
help
If your target CPU does not have a Floating Point Unit (FPU) or a
kernel FPU emulator, but you still wish to support floating point
functions, then everything will need to be compiled with soft floating
point support (-msoft-float).
Most people will answer N.
config USE_MIPS16
bool "Build packages with MIPS16 instructions" if TARGET_OPTIONS
depends on HAS_MIPS16
help
If your target CPU does support the MIPS16 instruction set
and you want to use it for packages, enable this option.
MIPS16 produces smaller binaries thus reducing pressure on
caches and TLB.
Most people will answer N.
source "toolchain/Config.in"
source "target/imagebuilder/Config.in"
source "target/sdk/Config.in"
source "target/toolchain/Config.in"
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source "tmp/.config-package.in"