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 menuconfig TARGET_ROOTFS_UBIFS
112 default y if USES_UBIFS
113 depends on USES_UBIFS
115 Build a ubifs root filesystem
119 default TARGET_UBIFS_COMPRESSION_NONE
120 depends on TARGET_ROOTFS_UBIFS
122 Select compression type
124 config TARGET_UBIFS_COMPRESSION_NONE
127 config TARGET_UBIFS_COMPRESSION_LZO
130 config TARGET_UBIFS_COMPRESSION_ZLIB
134 config TARGET_UBIFS_FREE_SPACE_FIXUP
135 bool "free space fixup" if TARGET_ROOTFS_UBIFS
138 The file-system free space has to be fixed up on first mount
140 config TARGET_UBIFS_JOURNAL_SIZE
142 prompt "journal size" if TARGET_ROOTFS_UBIFS
145 config TARGET_UBIFS_SQUASH_UIDS
146 bool "squash uids" if TARGET_ROOTFS_UBIFS
149 Squash owners making all files owned by root
151 comment "Image Options"
153 source "target/linux/*/image/Config.in"
155 config TARGET_ROOTFS_PARTSIZE
156 int "Root filesystem partition size (in MB)"
157 depends on X86_GRUB_IMAGES || TARGET_ROOTFS_EXT4FS || TARGET_rb532
160 Allows you to change the root filesystem partition size
162 config TARGET_ROOTFS_MAXINODE
163 int "Maximum number of inodes in root filesystem"
164 depends on TARGET_ROOTFS_EXT4FS
167 Allows you to change the maximum number of inodes in the root filesystem
169 config TARGET_ROOTFS_RESERVED_PCT
170 int "Percentage of reserved blocks in root filesystem"
171 depends on TARGET_ROOTFS_EXT4FS
174 Allows you to change the percentage of reserved blocks in the root filesystem
176 config TARGET_ROOTFS_INCLUDE_KERNEL
177 bool "Include kernel in root filesystem"
178 depends on TARGET_ROOTFS_UBIFS || TARGET_ROOTFS_EXT4FS
179 default n if USES_UBIFS
181 Include the kernel image in the rootfs. Typically the image is placed
184 config TARGET_ROOTFS_INCLUDE_DTB
185 bool "Include DTB in root filesystem"
186 depends on TARGET_ROOTFS_UBIFS || TARGET_ROOTFS_EXT4FS
187 default n if USES_UBIFS
189 Include the device tree blob file(s) in the rootfs. Typically the DTBs
190 are placed below /boot.
194 menu "Global build settings"
197 bool "Select all packages by default"
200 comment "General build options"
202 config DISPLAY_SUPPORT
203 bool "Show packages that require graphics support (local or remote)"
206 config BUILD_PATENTED
208 bool "Compile with support for patented functionality"
210 When this option is disabled, software which provides patented functionality will not be built.
211 In case software provides optional support for patented functionality,
212 this optional support will get disabled for this package.
216 bool "Compile with full language support"
218 When this option is enabled, packages are built with the full versions of iconv and GNU gettext
219 instead of the default OpenWrt stubs. If uClibc is used, it is also built with locale support.
221 config BUILD_STATIC_TOOLS
223 bool "Attempt to link host utilities statically"
225 Linking host utilities like sed or firmware-utils statically increases the portability of the
226 generated ImageBuilder and SDK tarballs, however it may fail on some Linux distributions.
228 config SHADOW_PASSWORDS
230 prompt "Enable shadow password support"
233 Enable shadow password support.
237 prompt "Remove ipkg/opkg status data files in final images"
240 This removes all ipkg/opkg status data files from the target directory before building the root fs
242 config COLLECT_KERNEL_DEBUG
244 prompt "Collect kernel debug information"
245 select KERNEL_DEBUG_INFO
248 This collects debugging symbols from the kernel and all compiled modules.
249 Useful for release builds, so that kernel issues can be debugged offline later.
251 comment "Kernel build options"
253 config KERNEL_DEBUG_FS
254 bool "Compile the kernel with Debug FileSystem enabled"
257 debugfs is a virtual file system that kernel developers use to put
258 debugging files into. Enable this option to be able to read and
259 write to these files.
261 config KERNEL_PERF_EVENTS
265 config KERNEL_PROFILING
266 bool "Compile the kernel with profiling enabled"
268 select KERNEL_PERF_EVENTS
270 Enable the extended profiling support mechanisms used by profilers such
273 config KERNEL_KALLSYMS
274 bool "Compile the kernel with symbol table information"
277 This will give you more information in stack traces from kernel oopses
280 bool "Compile the kernel with tracing support"
283 config KERNEL_FTRACE_SYSCALLS
284 bool "Trace system calls"
285 depends on KERNEL_FTRACE
288 config KERNEL_ENABLE_DEFAULT_TRACERS
289 bool "Trace process context switches and events"
290 depends on KERNEL_FTRACE
293 config KERNEL_DEBUG_KERNEL
297 config KERNEL_DEBUG_INFO
298 bool "Compile the kernel with debug information"
300 select KERNEL_DEBUG_KERNEL
302 This will compile your kernel and modules with debug information.
304 config KERNEL_DEBUG_LL_UART_NONE
309 config KERNEL_DEBUG_LL
313 select KERNEL_DEBUG_LL_UART_NONE
315 ARM low level debugging
317 config KERNEL_EARLY_PRINTK
318 bool "Compile the kernel with early printk"
321 select KERNEL_DEBUG_KERNEL
322 select KERNEL_DEBUG_LL if arm
324 Compile the kernel with early printk support.
325 This is only useful for debugging purposes to send messages
326 over the serial console in early boot.
327 Enable this to debug early boot problems.
330 bool "Compile the kernel with asynchronous IO support"
333 config KERNEL_DIRECT_IO
334 bool "Compile the kernel with direct IO support"
337 config KERNEL_MAGIC_SYSRQ
338 bool "Compile the kernel with SysRq support"
341 config KERNEL_COREDUMP
344 config KERNEL_ELF_CORE
345 bool "Enable process core dump support"
346 select KERNEL_COREDUMP
349 config KERNEL_PROVE_LOCKING
350 bool "Enable kernel lock checking"
351 select KERNEL_DEBUG_KERNEL
354 config KERNEL_PRINTK_TIME
355 bool "Enable printk timestamps"
362 bool "Enable kexec support"
365 bool "Enable rfkill support"
366 default RFKILL_SUPPORT
369 # CGROUP support symbols
372 config KERNEL_CGROUPS
373 bool "Enable kernel cgroups"
378 config KERNEL_CGROUP_DEBUG
379 bool "Example debug cgroup subsystem"
382 This option enables a simple cgroup subsystem that
383 exports useful debugging information about the cgroups
386 config KERNEL_FREEZER
388 default y if KERNEL_CGROUP_FREEZER
390 config KERNEL_CGROUP_FREEZER
391 bool "Freezer cgroup subsystem"
394 Provides a way to freeze and unfreeze all tasks in a
397 config KERNEL_CGROUP_DEVICE
398 bool "Device controller for cgroups"
401 Provides a cgroup implementing whitelists for devices which
402 a process in the cgroup can mknod or open.
404 config KERNEL_CPUSETS
405 bool "Cpuset support"
408 This option will let you create and manage CPUSETs which
409 allow dynamically partitioning a system into sets of CPUs and
410 Memory Nodes and assigning tasks to run only within those sets.
411 This is primarily useful on large SMP or NUMA systems.
413 config KERNEL_PROC_PID_CPUSET
414 bool "Include legacy /proc/<pid>/cpuset file"
416 depends on KERNEL_CPUSETS
418 config KERNEL_CGROUP_CPUACCT
419 bool "Simple CPU accounting cgroup subsystem"
422 Provides a simple Resource Controller for monitoring the
423 total CPU consumed by the tasks in a cgroup.
425 config KERNEL_RESOURCE_COUNTERS
426 bool "Resource counters"
429 This option enables controller independent resource accounting
430 infrastructure that works with cgroups.
432 config KERNEL_MM_OWNER
434 default y if KERNEL_MEMCG
437 bool "Memory Resource Controller for Control Groups"
439 depends on KERNEL_RESOURCE_COUNTERS
441 Provides a memory resource controller that manages both anonymous
442 memory and page cache. (See Documentation/cgroups/memory.txt)
444 Note that setting this option increases fixed memory overhead
445 associated with each page of memory in the system. By this,
446 20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
447 usage tracking struct at boot. Total amount of this is printed out
450 Only enable when you're ok with these trade offs and really
451 sure you need the memory resource controller. Even when you enable
452 this, you can set "cgroup_disable=memory" at your boot option to
453 disable memory resource controller and you can avoid overheads.
454 (and lose benefits of memory resource controller)
456 This config option also selects MM_OWNER config option, which
457 could in turn add some fork/exit overhead.
459 config KERNEL_MEMCG_SWAP
460 bool "Memory Resource Controller Swap Extension"
462 depends on KERNEL_MEMCG
464 Add swap management feature to memory resource controller. When you
465 enable this, you can limit mem+swap usage per cgroup. In other words,
466 when you disable this, memory resource controller has no cares to
467 usage of swap...a process can exhaust all of the swap. This extension
468 is useful when you want to avoid exhaustion swap but this itself
469 adds more overheads and consumes memory for remembering information.
470 Especially if you use 32bit system or small memory system, please
471 be careful about enabling this. When memory resource controller
472 is disabled by boot option, this will be automatically disabled and
473 there will be no overhead from this. Even when you set this config=y,
474 if boot option "swapaccount=0" is set, swap will not be accounted.
475 Now, memory usage of swap_cgroup is 2 bytes per entry. If swap page
476 size is 4096bytes, 512k per 1Gbytes of swap.
478 config KERNEL_MEMCG_SWAP_ENABLED
479 bool "Memory Resource Controller Swap Extension enabled by default"
481 depends on KERNEL_MEMCG_SWAP
483 Memory Resource Controller Swap Extension comes with its price in
484 a bigger memory consumption. General purpose distribution kernels
485 which want to enable the feature but keep it disabled by default
486 and let the user enable it by swapaccount boot command line
487 parameter should have this option unselected.
488 For those who want to have the feature enabled by default should
489 select this option (if, for some reason, they need to disable it
490 then swapaccount=0 does the trick).
493 config KERNEL_MEMCG_KMEM
494 bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)"
496 depends on KERNEL_MEMCG
498 The Kernel Memory extension for Memory Resource Controller can limit
499 the amount of memory used by kernel objects in the system. Those are
500 fundamentally different from the entities handled by the standard
501 Memory Controller, which are page-based, and can be swapped. Users of
502 the kmem extension can use it to guarantee that no group of processes
503 will ever exhaust kernel resources alone.
505 config KERNEL_CGROUP_PERF
506 bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
508 select KERNEL_PERF_EVENTS
510 This option extends the per-cpu mode to restrict monitoring to
511 threads which belong to the cgroup specified and run on the
514 menuconfig KERNEL_CGROUP_SCHED
515 bool "Group CPU scheduler"
518 This feature lets CPU scheduler recognize task groups and control CPU
519 bandwidth allocation to such task groups. It uses cgroups to group
522 if KERNEL_CGROUP_SCHED
524 config KERNEL_FAIR_GROUP_SCHED
525 bool "Group scheduling for SCHED_OTHER"
528 config KERNEL_CFS_BANDWIDTH
529 bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
531 depends on KERNEL_FAIR_GROUP_SCHED
533 This option allows users to define CPU bandwidth rates (limits) for
534 tasks running within the fair group scheduler. Groups with no limit
535 set are considered to be unconstrained and will run with no
537 See tip/Documentation/scheduler/sched-bwc.txt for more information.
539 config KERNEL_RT_GROUP_SCHED
540 bool "Group scheduling for SCHED_RR/FIFO"
543 This feature lets you explicitly allocate real CPU bandwidth
544 to task groups. If enabled, it will also make it impossible to
545 schedule realtime tasks for non-root users until you allocate
546 realtime bandwidth for them.
550 config KERNEL_BLK_CGROUP
551 bool "Block IO controller"
554 Generic block IO controller cgroup interface. This is the common
555 cgroup interface which should be used by various IO controlling
558 Currently, CFQ IO scheduler uses it to recognize task groups and
559 control disk bandwidth allocation (proportional time slice allocation)
560 to such task groups. It is also used by bio throttling logic in
561 block layer to implement upper limit in IO rates on a device.
563 This option only enables generic Block IO controller infrastructure.
564 One needs to also enable actual IO controlling logic/policy. For
565 enabling proportional weight division of disk bandwidth in CFQ, set
566 CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
567 CONFIG_BLK_DEV_THROTTLING=y.
569 config KERNEL_DEBUG_BLK_CGROUP
570 bool "Enable Block IO controller debugging"
572 depends on KERNEL_BLK_CGROUP
574 Enable some debugging help. Currently it exports additional stat
575 files in a cgroup which can be useful for debugging.
577 config KERNEL_NET_CLS_CGROUP
578 bool "Control Group Classifier"
581 config KERNEL_NETPRIO_CGROUP
582 bool "Network priority cgroup"
588 # Namespace support symbols
591 config KERNEL_NAMESPACES
592 bool "Enable kernel namespaces"
601 In this namespace tasks see different info provided
602 with the uname() system call
608 In this namespace tasks work with IPC ids which correspond to
609 different IPC objects in different namespaces.
611 config KERNEL_USER_NS
612 bool "User namespace (EXPERIMENTAL)"
615 This allows containers, i.e. vservers, to use user namespaces
616 to provide different user info for different servers.
619 bool "PID Namespaces"
622 Support process id namespaces. This allows having multiple
623 processes with the same pid as long as they are in different
624 pid namespaces. This is a building block of containers.
627 bool "Network namespace"
630 Allow user space to create what appear to be multiple instances
631 of the network stack.
636 # LXC related symbols
639 config KERNEL_LXC_MISC
640 bool "Enable miscellaneous LXC related options"
645 config KERNEL_DEVPTS_MULTIPLE_INSTANCES
646 bool "Support multiple instances of devpts"
649 Enable support for multiple instances of devpts filesystem.
650 If you want to have isolated PTY namespaces (eg: in containers),
651 say Y here. Otherwise, say N. If enabled, each mount of devpts
652 filesystem with the '-o newinstance' option will create an
653 independent PTY namespace.
655 config KERNEL_POSIX_MQUEUE
656 bool "POSIX Message Queues"
659 POSIX variant of message queues is a part of IPC. In POSIX message
660 queues every message has a priority which decides about succession
661 of receiving it by a process. If you want to compile and run
662 programs written e.g. for Solaris with use of its POSIX message
663 queues (functions mq_*) say Y here.
665 POSIX message queues are visible as a filesystem called 'mqueue'
666 and can be mounted somewhere if you want to do filesystem
667 operations on message queues.
671 comment "Package build options"
675 prompt "Compile packages with debugging info"
678 Adds -g3 to the CFLAGS
682 prompt "Enable IPv6 support in packages"
685 Enable IPV6 support in packages (passes --enable-ipv6 to configure scripts).
687 config PKG_BUILD_PARALLEL
689 prompt "Compile certain packages parallelized"
692 This adds a -jX option to certain packages that are known to
693 behave well for parallel build. By default the package make processes
694 use the main jobserver, in which case this option only takes effect
695 when you add -jX to the make command.
697 If you are unsure, select N.
699 config PKG_BUILD_USE_JOBSERVER
701 prompt "Use top-level make jobserver for packages"
702 depends on PKG_BUILD_PARALLEL
705 This passes the main make process jobserver fds to package builds,
706 enabling full parallelization across different packages
708 Note that disabling this may overcommit CPU resources depending on the
709 -j level of the main make process, the number of package
710 submake jobs selected below and the number of actual CPUs present.
711 Example: If the main make is passed a -j4 and the submake -j
712 is also set to 4, we may end up with 16 parallel make processes
716 config PKG_BUILD_JOBS
718 prompt "Number of package submake jobs (2-512)"
721 depends on PKG_BUILD_PARALLEL && !PKG_BUILD_USE_JOBSERVER
723 The number of jobs (-jX) to pass to packages submake.
725 config PKG_DEFAULT_PARALLEL
727 prompt "Parallelize the default package build rule (May break build)"
728 depends on PKG_BUILD_PARALLEL
732 Always set the default package build rules to parallel build.
734 WARNING: This may break build or kill your cat, as it builds
735 packages with multiple jobs that are probably not tested in
736 a parallel build environment.
738 Only say Y, if you don't mind fixing broken packages.
739 Before reporting build bugs, set this to N and re-run the build.
741 comment "Stripping options"
744 prompt "Binary stripping method"
745 default USE_STRIP if EXTERNAL_TOOLCHAIN
746 default USE_STRIP if USE_GLIBC || USE_EGLIBC || USE_MUSL
749 Select the binary stripping method you wish to use.
754 This will install unstripped binaries (useful for native compiling/debugging)
759 This will install binaries stripped using strip from binutils
765 depends on !USE_GLIBC
766 depends on !USE_EGLIBC
768 This will install binaries stripped using sstrip
773 prompt "Strip arguments"
775 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
776 default "--strip-all"
778 Specifies arguments passed to the strip command when stripping binaries
780 config STRIP_KERNEL_EXPORTS
781 bool "Strip unnecessary exports from the kernel image"
783 Reduces kernel size by stripping unused kernel exports from the kernel image
784 Note that this might make the kernel incompatible with any kernel modules that
785 were not selected at the time the kernel image was created
788 bool "Strip unnecessary functions from libraries"
790 Reduces libraries to only those functions that are necessary for using all
791 selected packages (including those selected as <M>)
792 Note that this will make the system libraries incompatible with most of the packages
793 that are not selected during the build process
796 prompt "Preferred standard C++ library"
797 default USE_LIBSTDCXX if USE_EGLIBC
800 Select the preferred standard C++ library for all packages that support this.
812 bool "Advanced configuration options (for developers)"
816 bool "Show broken platforms / packages" if DEVEL
819 config DOWNLOAD_FOLDER
820 string "Download folder" if DEVEL
824 string "Local mirror for source packages" if DEVEL
828 bool "Automatic rebuild of packages" if DEVEL
831 Automatically rebuild packages when their files change
834 string "Build suffix to append to the BUILD_DIR variable" if DEVEL
837 Build suffix to append to the BUILD_DIR variable, i.e: build_dir_suffix
839 config TARGET_ROOTFS_DIR
840 string "Override the default TARGET_ROOTFS_DIR variable" if DEVEL
843 Override the default TARGET_ROOTFS_DIR variable content $(BUILD_DIR) with custom path.
844 Use this option to re-define the location of the target root file system directory.
847 bool "Use ccache" if DEVEL
850 Compiler cache; see http://ccache.samba.org/
852 config EXTERNAL_KERNEL_TREE
853 string "Use external kernel tree" if DEVEL
856 config KERNEL_GIT_CLONE_URI
857 string "Enter git repository to clone" if DEVEL
860 Enter the full git repository path i.e.:
861 git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
862 This will create a git clone of the kernel in your build
865 config KERNEL_GIT_LOCAL_REPOSITORY
866 string "Enter path to local reference repository" if DEVEL
869 Enter a full pathname to a local reference git repository.
870 In this instance, the --refererence option of git clone will
871 be used thus creating a quick local clone of your repo.
874 bool "Enable log files during build process" if DEVEL
876 If enabled log files will be written to the ./log directory
878 config SRC_TREE_OVERRIDE
879 bool "Enable package source tree override" if DEVEL
881 If enabled, you can force a package to use a git tree as source
882 code instead of the normal tarball. Create a symlink 'git-src'
883 in the package directory, pointing to the .git tree that you want
884 to pull the source code from
886 config EXTRA_OPTIMIZATION
887 string "Additional compiler options" if DEVEL
888 default "-fno-caller-saves"
890 Extra Target-independent optimizations to use when building for the target.
892 menuconfig TARGET_OPTIONS
893 bool "Target Options" if DEVEL
895 config TARGET_OPTIMIZATION
896 string "Target Optimizations" if TARGET_OPTIONS
897 default DEFAULT_TARGET_OPTIMIZATION
899 Optimizations to use when building for the target host.
902 bool "Use software floating point by default" if TARGET_OPTIONS
904 depends on (arm || armeb || powerpc || mipsel || mips || mips64el || mips64) && !HAS_FPU
906 If your target CPU does not have a Floating Point Unit (FPU) or a
907 kernel FPU emulator, but you still wish to support floating point
908 functions, then everything will need to be compiled with soft floating
909 point support (-msoft-float).
911 Most people will answer N.
914 bool "Build packages with MIPS16 instructions" if TARGET_OPTIONS
915 depends on HAS_MIPS16
916 depends on !GCC_VERSION_4_6
919 If your target CPU does support the MIPS16 instruction set
920 and you want to use it for packages, enable this option.
921 MIPS16 produces smaller binaries thus reducing pressure on
924 Most people will answer N.
926 source "toolchain/Config.in"
928 source "target/imagebuilder/Config.in"
929 source "target/sdk/Config.in"
930 source "target/toolchain/Config.in"
932 source "tmp/.config-package.in"