1 # Copyright (C) 2006-2012 OpenWrt.org
3 # This is free software, licensed under the GNU General Public License v2.
4 # See /LICENSE for more information.
7 mainmenu "OpenWrt Configuration"
13 config HAVE_DOT_CONFIG
17 source "target/Config.in"
21 menuconfig TARGET_ROOTFS_INITRAMFS
23 default y if USES_INITRAMFS
25 Embed the rootfs into the kernel (initramfs)
29 default TARGET_INITRAMFS_COMPRESSION_LZMA if TARGET_ar71xx
30 default TARGET_INITRAMFS_COMPRESSION_LZMA if TARGET_ramips
31 default TARGET_INITRAMFS_COMPRESSION_NONE
32 depends on TARGET_ROOTFS_INITRAMFS
34 Select ramdisk compression.
36 config TARGET_INITRAMFS_COMPRESSION_NONE
39 config TARGET_INITRAMFS_COMPRESSION_GZIP
42 config TARGET_INITRAMFS_COMPRESSION_BZIP2
45 config TARGET_INITRAMFS_COMPRESSION_LZMA
48 config TARGET_INITRAMFS_COMPRESSION_LZO
51 config TARGET_INITRAMFS_COMPRESSION_XZ
57 prompt "Use external cpio" if TARGET_ROOTFS_INITRAMFS
60 Kernel uses specified external cpio as INITRAMFS_SOURCE
62 comment "Root filesystem archives"
64 config TARGET_ROOTFS_CPIOGZ
66 default y if USES_CPIOGZ
68 Build a compressed cpio archive of the the root filesystem
70 config TARGET_ROOTFS_TARGZ
72 default y if USES_TARGZ
74 Build a compressed tar archive of the the root filesystem
76 comment "Root filesystem images"
78 config TARGET_ROOTFS_EXT4FS
80 default y if USES_EXT4
82 Ext4 file system with some free space for uml images
84 config TARGET_ROOTFS_ISO
87 depends on TARGET_x86_generic
89 Create some bootable ISO image
91 config TARGET_ROOTFS_JFFS2
93 default y if USES_JFFS2
95 Build a jffs2 root filesystem
97 config TARGET_ROOTFS_JFFS2_NAND
99 default y if USES_JFFS2_NAND
100 depends on USES_JFFS2_NAND
102 Build a jffs2 root filesystem for NAND flash
104 config TARGET_ROOTFS_SQUASHFS
106 default y if USES_SQUASHFS
108 Build a squashfs-lzma root filesystem
110 config TARGET_ROOTFS_UBIFS
112 default y if USES_UBIFS
113 depends on USES_UBIFS
115 Build a ubifs root filesystem
117 comment "Image Options"
119 source "target/linux/*/image/Config.in"
121 config TARGET_ROOTFS_PARTSIZE
122 int "Root filesystem partition size (in MB)"
123 depends on X86_GRUB_IMAGES || TARGET_ROOTFS_EXT4FS || TARGET_rb532
126 Allows you to change the root filesystem partition size
128 config TARGET_ROOTFS_MAXINODE
129 int "Maximum number of inodes in root filesystem"
130 depends on TARGET_ROOTFS_EXT4FS
133 Allows you to change the maximum number of inodes in the root filesystem
135 config TARGET_ROOTFS_RESERVED_PCT
136 int "Percentage of reserved blocks in root filesystem"
137 depends on TARGET_ROOTFS_EXT4FS
140 Allows you to change the percentage of reserved blocks in the root filesystem
144 menu "Global build settings"
147 bool "Select all packages by default"
150 comment "General build options"
152 config DISPLAY_SUPPORT
153 bool "Show packages that require graphics support (local or remote)"
156 config BUILD_PATENTED
158 bool "Compile with support for patented functionality"
160 When this option is disabled, software which provides patented functionality will not be built.
161 In case software provides optional support for patented functionality,
162 this optional support will get disabled for this package.
166 bool "Compile with full language support"
168 When this option is enabled, packages are built with the full versions of iconv and GNU gettext
169 instead of the default OpenWrt stubs. If uClibc is used, it is also built with locale support.
171 config BUILD_STATIC_TOOLS
173 bool "Attempt to link host utilities statically"
175 Linking host utilities like sed or firmware-utils statically increases the portability of the
176 generated ImageBuilder and SDK tarballs, however it may fail on some Linux distributions.
178 config SHADOW_PASSWORDS
180 prompt "Enable shadow password support"
183 Enable shadow password support.
187 prompt "Remove ipkg/opkg status data files in final images"
190 This removes all ipkg/opkg status data files from the target directory before building the root fs
192 config COLLECT_KERNEL_DEBUG
194 prompt "Collect kernel debug information"
195 select KERNEL_DEBUG_INFO
198 This collects debugging symbols from the kernel and all compiled modules.
199 Useful for release builds, so that kernel issues can be debugged offline later.
201 comment "Kernel build options"
203 config KERNEL_DEBUG_FS
204 bool "Compile the kernel with Debug FileSystem enabled"
207 debugfs is a virtual file system that kernel developers use to put
208 debugging files into. Enable this option to be able to read and
209 write to these files.
211 config KERNEL_PERF_EVENTS
215 config KERNEL_PROFILING
216 bool "Compile the kernel with profiling enabled"
218 select KERNEL_PERF_EVENTS
220 Enable the extended profiling support mechanisms used by profilers such
223 config KERNEL_KALLSYMS
224 bool "Compile the kernel with symbol table information"
227 This will give you more information in stack traces from kernel oopses
230 bool "Compile the kernel with tracing support"
233 config KERNEL_ENABLE_DEFAULT_TRACERS
234 bool "Trace process context switches and events"
235 depends on KERNEL_FTRACE
238 config KERNEL_DEBUG_KERNEL
242 config KERNEL_DEBUG_INFO
243 bool "Compile the kernel with debug information"
245 select KERNEL_DEBUG_KERNEL
247 This will compile your kernel and modules with debug information.
249 config KERNEL_DEBUG_LL_UART_NONE
254 config KERNEL_DEBUG_LL
258 select KERNEL_DEBUG_LL_UART_NONE
260 ARM low level debugging
262 config KERNEL_EARLY_PRINTK
263 bool "Compile the kernel with early printk"
266 select KERNEL_DEBUG_KERNEL
267 select KERNEL_DEBUG_LL if arm
269 Compile the kernel with early printk support.
270 This is only useful for debugging purposes to send messages
271 over the serial console in early boot.
272 Enable this to debug early boot problems.
275 bool "Compile the kernel with asynchronous IO support"
278 config KERNEL_DIRECT_IO
279 bool "Compile the kernel with direct IO support"
282 config KERNEL_MAGIC_SYSRQ
283 bool "Compile the kernel with SysRq support"
286 config KERNEL_COREDUMP
289 config KERNEL_ELF_CORE
290 bool "Enable process core dump support"
291 select KERNEL_COREDUMP
294 config KERNEL_PROVE_LOCKING
295 bool "Enable kernel lock checking"
296 select KERNEL_DEBUG_KERNEL
299 config KERNEL_PRINTK_TIME
300 bool "Enable printk timestamps"
307 # CGROUP support symbols
310 config KERNEL_CGROUPS
311 bool "Enable kernel cgroups"
316 config KERNEL_CGROUP_DEBUG
317 bool "Example debug cgroup subsystem"
320 This option enables a simple cgroup subsystem that
321 exports useful debugging information about the cgroups
324 config KERNEL_FREEZER
326 default y if KERNEL_CGROUP_FREEZER
328 config KERNEL_CGROUP_FREEZER
329 bool "Freezer cgroup subsystem"
332 Provides a way to freeze and unfreeze all tasks in a
335 config KERNEL_CGROUP_DEVICE
336 bool "Device controller for cgroups"
339 Provides a cgroup implementing whitelists for devices which
340 a process in the cgroup can mknod or open.
342 config KERNEL_CPUSETS
343 bool "Cpuset support"
346 This option will let you create and manage CPUSETs which
347 allow dynamically partitioning a system into sets of CPUs and
348 Memory Nodes and assigning tasks to run only within those sets.
349 This is primarily useful on large SMP or NUMA systems.
351 config KERNEL_PROC_PID_CPUSET
352 bool "Include legacy /proc/<pid>/cpuset file"
354 depends on KERNEL_CPUSETS
356 config KERNEL_CGROUP_CPUACCT
357 bool "Simple CPU accounting cgroup subsystem"
360 Provides a simple Resource Controller for monitoring the
361 total CPU consumed by the tasks in a cgroup.
363 config KERNEL_RESOURCE_COUNTERS
364 bool "Resource counters"
367 This option enables controller independent resource accounting
368 infrastructure that works with cgroups.
370 config KERNEL_MM_OWNER
372 default y if KERNEL_MEMCG
375 bool "Memory Resource Controller for Control Groups"
377 depends on KERNEL_RESOURCE_COUNTERS
379 Provides a memory resource controller that manages both anonymous
380 memory and page cache. (See Documentation/cgroups/memory.txt)
382 Note that setting this option increases fixed memory overhead
383 associated with each page of memory in the system. By this,
384 20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
385 usage tracking struct at boot. Total amount of this is printed out
388 Only enable when you're ok with these trade offs and really
389 sure you need the memory resource controller. Even when you enable
390 this, you can set "cgroup_disable=memory" at your boot option to
391 disable memory resource controller and you can avoid overheads.
392 (and lose benefits of memory resource controller)
394 This config option also selects MM_OWNER config option, which
395 could in turn add some fork/exit overhead.
397 config KERNEL_MEMCG_SWAP
398 bool "Memory Resource Controller Swap Extension"
400 depends on KERNEL_MEMCG
402 Add swap management feature to memory resource controller. When you
403 enable this, you can limit mem+swap usage per cgroup. In other words,
404 when you disable this, memory resource controller has no cares to
405 usage of swap...a process can exhaust all of the swap. This extension
406 is useful when you want to avoid exhaustion swap but this itself
407 adds more overheads and consumes memory for remembering information.
408 Especially if you use 32bit system or small memory system, please
409 be careful about enabling this. When memory resource controller
410 is disabled by boot option, this will be automatically disabled and
411 there will be no overhead from this. Even when you set this config=y,
412 if boot option "swapaccount=0" is set, swap will not be accounted.
413 Now, memory usage of swap_cgroup is 2 bytes per entry. If swap page
414 size is 4096bytes, 512k per 1Gbytes of swap.
416 config KERNEL_MEMCG_SWAP_ENABLED
417 bool "Memory Resource Controller Swap Extension enabled by default"
419 depends on KERNEL_MEMCG_SWAP
421 Memory Resource Controller Swap Extension comes with its price in
422 a bigger memory consumption. General purpose distribution kernels
423 which want to enable the feature but keep it disabled by default
424 and let the user enable it by swapaccount boot command line
425 parameter should have this option unselected.
426 For those who want to have the feature enabled by default should
427 select this option (if, for some reason, they need to disable it
428 then swapaccount=0 does the trick).
431 config KERNEL_MEMCG_KMEM
432 bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)"
434 depends on KERNEL_MEMCG
436 The Kernel Memory extension for Memory Resource Controller can limit
437 the amount of memory used by kernel objects in the system. Those are
438 fundamentally different from the entities handled by the standard
439 Memory Controller, which are page-based, and can be swapped. Users of
440 the kmem extension can use it to guarantee that no group of processes
441 will ever exhaust kernel resources alone.
443 config KERNEL_PERF_EVENTS
445 default y if KERNEL_CGROUP_PERF
447 config KERNEL_CGROUP_PERF
448 bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
451 This option extends the per-cpu mode to restrict monitoring to
452 threads which belong to the cgroup specified and run on the
455 menuconfig KERNEL_CGROUP_SCHED
456 bool "Group CPU scheduler"
459 This feature lets CPU scheduler recognize task groups and control CPU
460 bandwidth allocation to such task groups. It uses cgroups to group
463 if KERNEL_CGROUP_SCHED
465 config KERNEL_FAIR_GROUP_SCHED
466 bool "Group scheduling for SCHED_OTHER"
469 config KERNEL_CFS_BANDWIDTH
470 bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
472 depends on KERNEL_FAIR_GROUP_SCHED
474 This option allows users to define CPU bandwidth rates (limits) for
475 tasks running within the fair group scheduler. Groups with no limit
476 set are considered to be unconstrained and will run with no
478 See tip/Documentation/scheduler/sched-bwc.txt for more information.
480 config KERNEL_RT_GROUP_SCHED
481 bool "Group scheduling for SCHED_RR/FIFO"
484 This feature lets you explicitly allocate real CPU bandwidth
485 to task groups. If enabled, it will also make it impossible to
486 schedule realtime tasks for non-root users until you allocate
487 realtime bandwidth for them.
491 config KERNEL_BLK_CGROUP
492 bool "Block IO controller"
495 Generic block IO controller cgroup interface. This is the common
496 cgroup interface which should be used by various IO controlling
499 Currently, CFQ IO scheduler uses it to recognize task groups and
500 control disk bandwidth allocation (proportional time slice allocation)
501 to such task groups. It is also used by bio throttling logic in
502 block layer to implement upper limit in IO rates on a device.
504 This option only enables generic Block IO controller infrastructure.
505 One needs to also enable actual IO controlling logic/policy. For
506 enabling proportional weight division of disk bandwidth in CFQ, set
507 CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
508 CONFIG_BLK_DEV_THROTTLING=y.
510 config KERNEL_DEBUG_BLK_CGROUP
511 bool "Enable Block IO controller debugging"
513 depends on KERNEL_BLK_CGROUP
515 Enable some debugging help. Currently it exports additional stat
516 files in a cgroup which can be useful for debugging.
518 config KERNEL_NET_CLS_CGROUP
519 bool "Control Group Classifier"
522 config KERNEL_NETPRIO_CGROUP
523 bool "Network priority cgroup"
529 # Namespace support symbols
532 config KERNEL_NAMESPACES
533 bool "Enable kernel namespaces"
542 In this namespace tasks see different info provided
543 with the uname() system call
549 In this namespace tasks work with IPC ids which correspond to
550 different IPC objects in different namespaces.
552 config KERNEL_USER_NS
553 bool "User namespace (EXPERIMENTAL)"
556 This allows containers, i.e. vservers, to use user namespaces
557 to provide different user info for different servers.
560 bool "PID Namespaces"
563 Support process id namespaces. This allows having multiple
564 processes with the same pid as long as they are in different
565 pid namespaces. This is a building block of containers.
568 bool "Network namespace"
571 Allow user space to create what appear to be multiple instances
572 of the network stack.
577 # LXC related symbols
580 config KERNEL_LXC_MISC
581 bool "Enable miscellaneous LXC related options"
586 config KERNEL_DEVPTS_MULTIPLE_INSTANCES
587 bool "Support multiple instances of devpts"
590 Enable support for multiple instances of devpts filesystem.
591 If you want to have isolated PTY namespaces (eg: in containers),
592 say Y here. Otherwise, say N. If enabled, each mount of devpts
593 filesystem with the '-o newinstance' option will create an
594 independent PTY namespace.
596 config KERNEL_POSIX_MQUEUE
597 bool "POSIX Message Queues"
600 POSIX variant of message queues is a part of IPC. In POSIX message
601 queues every message has a priority which decides about succession
602 of receiving it by a process. If you want to compile and run
603 programs written e.g. for Solaris with use of its POSIX message
604 queues (functions mq_*) say Y here.
606 POSIX message queues are visible as a filesystem called 'mqueue'
607 and can be mounted somewhere if you want to do filesystem
608 operations on message queues.
612 comment "Package build options"
616 prompt "Compile packages with debugging info"
619 Adds -g3 to the CFLAGS
623 prompt "Enable IPv6 support in packages"
626 Enable IPV6 support in packages (passes --enable-ipv6 to configure scripts).
628 config PKG_BUILD_PARALLEL
630 prompt "Compile certain packages parallelized"
633 This adds a -jX option to certain packages that are known to
634 behave well for parallel build. By default the package make processes
635 use the main jobserver, in which case this option only takes effect
636 when you add -jX to the make command.
638 If you are unsure, select N.
640 config PKG_BUILD_USE_JOBSERVER
642 prompt "Use top-level make jobserver for packages"
643 depends on PKG_BUILD_PARALLEL
646 This passes the main make process jobserver fds to package builds,
647 enabling full parallelization across different packages
649 Note that disabling this may overcommit CPU resources depending on the
650 -j level of the main make process, the number of package
651 submake jobs selected below and the number of actual CPUs present.
652 Example: If the main make is passed a -j4 and the submake -j
653 is also set to 4, we may end up with 16 parallel make processes
657 config PKG_BUILD_JOBS
659 prompt "Number of package submake jobs (2-512)"
662 depends on PKG_BUILD_PARALLEL && !PKG_BUILD_USE_JOBSERVER
664 The number of jobs (-jX) to pass to packages submake.
666 config PKG_DEFAULT_PARALLEL
668 prompt "Parallelize the default package build rule (May break build)"
669 depends on PKG_BUILD_PARALLEL
673 Always set the default package build rules to parallel build.
675 WARNING: This may break build or kill your cat, as it builds
676 packages with multiple jobs that are probably not tested in
677 a parallel build environment.
679 Only say Y, if you don't mind fixing broken packages.
680 Before reporting build bugs, set this to N and re-run the build.
682 comment "Stripping options"
685 prompt "Binary stripping method"
686 default USE_STRIP if EXTERNAL_TOOLCHAIN
687 default USE_STRIP if USE_GLIBC || USE_EGLIBC || USE_MUSL
690 Select the binary stripping method you wish to use.
695 This will install unstripped binaries (useful for native compiling/debugging)
700 This will install binaries stripped using strip from binutils
706 depends on !USE_GLIBC
707 depends on !USE_EGLIBC
709 This will install binaries stripped using sstrip
714 prompt "Strip arguments"
716 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
717 default "--strip-all"
719 Specifies arguments passed to the strip command when stripping binaries
721 config STRIP_KERNEL_EXPORTS
722 bool "Strip unnecessary exports from the kernel image"
724 Reduces kernel size by stripping unused kernel exports from the kernel image
725 Note that this might make the kernel incompatible with any kernel modules that
726 were not selected at the time the kernel image was created
729 bool "Strip unnecessary functions from libraries"
731 Reduces libraries to only those functions that are necessary for using all
732 selected packages (including those selected as <M>)
733 Note that this will make the system libraries incompatible with most of the packages
734 that are not selected during the build process
737 prompt "Preferred standard C++ library"
738 default USE_LIBSTDCXX if USE_EGLIBC
741 Select the preferred standard C++ library for all packages that support this.
753 bool "Advanced configuration options (for developers)"
757 bool "Show broken platforms / packages" if DEVEL
760 config DOWNLOAD_FOLDER
761 string "Download folder" if DEVEL
765 string "Local mirror for source packages" if DEVEL
769 bool "Automatic rebuild of packages" if DEVEL
772 Automatically rebuild packages when their files change
775 string "Build suffix to append to the BUILD_DIR variable" if DEVEL
778 Build suffix to append to the BUILD_DIR variable, i.e: build_dir_suffix
780 config TARGET_ROOTFS_DIR
781 string "Override the default TARGET_ROOTFS_DIR variable" if DEVEL
784 Override the default TARGET_ROOTFS_DIR variable content $(BUILD_DIR) with custom path.
785 Use this option to re-define the location of the target root file system directory.
788 bool "Use ccache" if DEVEL
791 Compiler cache; see http://ccache.samba.org/
793 config EXTERNAL_KERNEL_TREE
794 string "Use external kernel tree" if DEVEL
797 config KERNEL_GIT_CLONE_URI
798 string "Enter git repository to clone" if DEVEL
801 Enter the full git repository path i.e.:
802 git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
803 This will create a git clone of the kernel in your build
806 config KERNEL_GIT_LOCAL_REPOSITORY
807 string "Enter path to local reference repository" if DEVEL
810 Enter a full pathname to a local reference git repository.
811 In this instance, the --refererence option of git clone will
812 be used thus creating a quick local clone of your repo.
815 bool "Enable log files during build process" if DEVEL
817 If enabled log files will be written to the ./log directory
819 config SRC_TREE_OVERRIDE
820 bool "Enable package source tree override" if DEVEL
822 If enabled, you can force a package to use a git tree as source
823 code instead of the normal tarball. Create a symlink 'git-src'
824 in the package directory, pointing to the .git tree that you want
825 to pull the source code from
827 menuconfig TARGET_OPTIONS
828 bool "Target Options" if DEVEL
830 config TARGET_OPTIMIZATION
831 string "Target Optimizations" if TARGET_OPTIONS
832 default DEFAULT_TARGET_OPTIMIZATION
834 Optimizations to use when building for the target host.
837 bool "Use software floating point by default" if TARGET_OPTIONS
839 depends on (arm || armeb || powerpc || mipsel || mips || mips64el || mips64) && !HAS_FPU
841 If your target CPU does not have a Floating Point Unit (FPU) or a
842 kernel FPU emulator, but you still wish to support floating point
843 functions, then everything will need to be compiled with soft floating
844 point support (-msoft-float).
846 Most people will answer N.
849 bool "Build packages with MIPS16 instructions" if TARGET_OPTIONS
850 depends on HAS_MIPS16
852 If your target CPU does support the MIPS16 instruction set
853 and you want to use it for packages, enable this option.
854 MIPS16 produces smaller binaries thus reducing pressure on
857 Most people will answer N.
859 source "toolchain/Config.in"
861 source "target/imagebuilder/Config.in"
862 source "target/sdk/Config.in"
863 source "target/toolchain/Config.in"
865 source "tmp/.config-package.in"