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
81 depends on !TARGET_ROOTFS_INITRAMFS
83 Ext4 file system with some free space for uml images
85 config TARGET_ROOTFS_ISO
88 depends on TARGET_x86_generic
89 depends on !TARGET_ROOTFS_INITRAMFS
91 Create some bootable ISO image
93 config TARGET_ROOTFS_JFFS2
95 default y if USES_JFFS2
96 depends on !TARGET_ROOTFS_INITRAMFS
98 Build a jffs2 root filesystem
100 config TARGET_ROOTFS_JFFS2_NAND
101 bool "jffs2 for NAND"
102 default y if USES_JFFS2_NAND
103 depends on !TARGET_ROOTFS_INITRAMFS && USES_JFFS2_NAND
105 Build a jffs2 root filesystem for NAND flash
107 config TARGET_ROOTFS_SQUASHFS
109 default y if USES_SQUASHFS
110 depends on !TARGET_ROOTFS_INITRAMFS
112 Build a squashfs-lzma root filesystem
114 config TARGET_ROOTFS_UBIFS
116 default y if USES_UBIFS
117 depends on !TARGET_ROOTFS_INITRAMFS && USES_UBIFS
119 Build a ubifs root filesystem
121 comment "Image Options"
123 source "target/linux/*/image/Config.in"
125 config TARGET_ROOTFS_PARTSIZE
126 int "Root filesystem partition size (in MB)"
127 depends on X86_GRUB_IMAGES || TARGET_ROOTFS_EXT4FS || TARGET_rb532
130 Allows you to change the root filesystem partition size
132 config TARGET_ROOTFS_MAXINODE
133 int "Maximum number of inodes in root filesystem"
134 depends on TARGET_ROOTFS_EXT4FS
137 Allows you to change the maximum number of inodes in the root filesystem
139 config TARGET_ROOTFS_RESERVED_PCT
140 int "Percentage of reserved blocks in root filesystem"
141 depends on TARGET_ROOTFS_EXT4FS
144 Allows you to change the percentage of reserved blocks in the root filesystem
148 menu "Global build settings"
151 bool "Select all packages by default"
154 comment "General build options"
156 config DISPLAY_SUPPORT
157 bool "Show packages that require graphics support (local or remote)"
160 config BUILD_PATENTED
162 bool "Compile with support for patented functionality"
164 When this option is disabled, software which provides patented functionality will not be built.
165 In case software provides optional support for patented functionality,
166 this optional support will get disabled for this package.
170 bool "Compile with full language support"
172 When this option is enabled, packages are built with the full versions of iconv and GNU gettext
173 instead of the default OpenWrt stubs. If uClibc is used, it is also built with locale support.
175 config BUILD_STATIC_TOOLS
177 bool "Attempt to link host utilities statically"
179 Linking host utilities like sed or firmware-utils statically increases the portability of the
180 generated ImageBuilder and SDK tarballs, however it may fail on some Linux distributions.
182 config SHADOW_PASSWORDS
184 prompt "Enable shadow password support"
187 Enable shadow password support.
191 prompt "Remove ipkg/opkg status data files in final images"
194 This removes all ipkg/opkg status data files from the target directory before building the root fs
196 config COLLECT_KERNEL_DEBUG
198 prompt "Collect kernel debug information"
199 select KERNEL_DEBUG_INFO
202 This collects debugging symbols from the kernel and all compiled modules.
203 Useful for release builds, so that kernel issues can be debugged offline later.
205 comment "Kernel build options"
207 config KERNEL_DEBUG_FS
208 bool "Compile the kernel with Debug FileSystem enabled"
211 debugfs is a virtual file system that kernel developers use to put
212 debugging files into. Enable this option to be able to read and
213 write to these files.
215 config KERNEL_PERF_EVENTS
219 config KERNEL_PROFILING
220 bool "Compile the kernel with profiling enabled"
222 select KERNEL_PERF_EVENTS
224 Enable the extended profiling support mechanisms used by profilers such
227 config KERNEL_KALLSYMS
228 bool "Compile the kernel with symbol table information"
231 This will give you more information in stack traces from kernel oopses
234 bool "Compile the kernel with tracing support"
237 config KERNEL_ENABLE_DEFAULT_TRACERS
238 bool "Trace process context switches and events"
239 depends on KERNEL_FTRACE
242 config KERNEL_DEBUG_KERNEL
246 config KERNEL_DEBUG_INFO
247 bool "Compile the kernel with debug information"
249 select KERNEL_DEBUG_KERNEL
251 This will compile your kernel and modules with debug information.
253 config KERNEL_DEBUG_LL_UART_NONE
258 config KERNEL_DEBUG_LL
262 select KERNEL_DEBUG_LL_UART_NONE
264 ARM low level debugging
266 config KERNEL_EARLY_PRINTK
267 bool "Compile the kernel with early printk"
270 select KERNEL_DEBUG_KERNEL
271 select KERNEL_DEBUG_LL if arm
273 Compile the kernel with early printk support.
274 This is only useful for debugging purposes to send messages
275 over the serial console in early boot.
276 Enable this to debug early boot problems.
279 bool "Compile the kernel with asynchronous IO support"
282 config KERNEL_DIRECT_IO
283 bool "Compile the kernel with direct IO support"
286 config KERNEL_MAGIC_SYSRQ
287 bool "Compile the kernel with SysRq support"
290 config KERNEL_COREDUMP
293 config KERNEL_ELF_CORE
294 bool "Enable process core dump support"
295 select KERNEL_COREDUMP
298 config KERNEL_PROVE_LOCKING
299 bool "Enable kernel lock checking"
300 select KERNEL_DEBUG_KERNEL
303 config KERNEL_PRINTK_TIME
304 bool "Enable printk timestamps"
311 # CGROUP support symbols
314 config KERNEL_CGROUPS
315 bool "Enable kernel cgroups"
320 config KERNEL_CGROUP_DEBUG
321 bool "Example debug cgroup subsystem"
324 This option enables a simple cgroup subsystem that
325 exports useful debugging information about the cgroups
328 config KERNEL_FREEZER
330 default y if KERNEL_CGROUP_FREEZER
332 config KERNEL_CGROUP_FREEZER
333 bool "Freezer cgroup subsystem"
336 Provides a way to freeze and unfreeze all tasks in a
339 config KERNEL_CGROUP_DEVICE
340 bool "Device controller for cgroups"
343 Provides a cgroup implementing whitelists for devices which
344 a process in the cgroup can mknod or open.
346 config KERNEL_CPUSETS
347 bool "Cpuset support"
350 This option will let you create and manage CPUSETs which
351 allow dynamically partitioning a system into sets of CPUs and
352 Memory Nodes and assigning tasks to run only within those sets.
353 This is primarily useful on large SMP or NUMA systems.
355 config KERNEL_PROC_PID_CPUSET
356 bool "Include legacy /proc/<pid>/cpuset file"
358 depends on KERNEL_CPUSETS
360 config KERNEL_CGROUP_CPUACCT
361 bool "Simple CPU accounting cgroup subsystem"
364 Provides a simple Resource Controller for monitoring the
365 total CPU consumed by the tasks in a cgroup.
367 config KERNEL_RESOURCE_COUNTERS
368 bool "Resource counters"
371 This option enables controller independent resource accounting
372 infrastructure that works with cgroups.
374 config KERNEL_MM_OWNER
376 default y if KERNEL_MEMCG
379 bool "Memory Resource Controller for Control Groups"
381 depends on KERNEL_RESOURCE_COUNTERS
383 Provides a memory resource controller that manages both anonymous
384 memory and page cache. (See Documentation/cgroups/memory.txt)
386 Note that setting this option increases fixed memory overhead
387 associated with each page of memory in the system. By this,
388 20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
389 usage tracking struct at boot. Total amount of this is printed out
392 Only enable when you're ok with these trade offs and really
393 sure you need the memory resource controller. Even when you enable
394 this, you can set "cgroup_disable=memory" at your boot option to
395 disable memory resource controller and you can avoid overheads.
396 (and lose benefits of memory resource controller)
398 This config option also selects MM_OWNER config option, which
399 could in turn add some fork/exit overhead.
401 config KERNEL_MEMCG_SWAP
402 bool "Memory Resource Controller Swap Extension"
404 depends on KERNEL_MEMCG
406 Add swap management feature to memory resource controller. When you
407 enable this, you can limit mem+swap usage per cgroup. In other words,
408 when you disable this, memory resource controller has no cares to
409 usage of swap...a process can exhaust all of the swap. This extension
410 is useful when you want to avoid exhaustion swap but this itself
411 adds more overheads and consumes memory for remembering information.
412 Especially if you use 32bit system or small memory system, please
413 be careful about enabling this. When memory resource controller
414 is disabled by boot option, this will be automatically disabled and
415 there will be no overhead from this. Even when you set this config=y,
416 if boot option "swapaccount=0" is set, swap will not be accounted.
417 Now, memory usage of swap_cgroup is 2 bytes per entry. If swap page
418 size is 4096bytes, 512k per 1Gbytes of swap.
420 config KERNEL_MEMCG_SWAP_ENABLED
421 bool "Memory Resource Controller Swap Extension enabled by default"
423 depends on KERNEL_MEMCG_SWAP
425 Memory Resource Controller Swap Extension comes with its price in
426 a bigger memory consumption. General purpose distribution kernels
427 which want to enable the feature but keep it disabled by default
428 and let the user enable it by swapaccount boot command line
429 parameter should have this option unselected.
430 For those who want to have the feature enabled by default should
431 select this option (if, for some reason, they need to disable it
432 then swapaccount=0 does the trick).
435 config KERNEL_MEMCG_KMEM
436 bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)"
438 depends on KERNEL_MEMCG
440 The Kernel Memory extension for Memory Resource Controller can limit
441 the amount of memory used by kernel objects in the system. Those are
442 fundamentally different from the entities handled by the standard
443 Memory Controller, which are page-based, and can be swapped. Users of
444 the kmem extension can use it to guarantee that no group of processes
445 will ever exhaust kernel resources alone.
447 config KERNEL_PERF_EVENTS
449 default y if KERNEL_CGROUP_PERF
451 config KERNEL_CGROUP_PERF
452 bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
455 This option extends the per-cpu mode to restrict monitoring to
456 threads which belong to the cgroup specified and run on the
459 menuconfig KERNEL_CGROUP_SCHED
460 bool "Group CPU scheduler"
463 This feature lets CPU scheduler recognize task groups and control CPU
464 bandwidth allocation to such task groups. It uses cgroups to group
467 if KERNEL_CGROUP_SCHED
469 config KERNEL_FAIR_GROUP_SCHED
470 bool "Group scheduling for SCHED_OTHER"
473 config KERNEL_CFS_BANDWIDTH
474 bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
476 depends on KERNEL_FAIR_GROUP_SCHED
478 This option allows users to define CPU bandwidth rates (limits) for
479 tasks running within the fair group scheduler. Groups with no limit
480 set are considered to be unconstrained and will run with no
482 See tip/Documentation/scheduler/sched-bwc.txt for more information.
484 config KERNEL_RT_GROUP_SCHED
485 bool "Group scheduling for SCHED_RR/FIFO"
488 This feature lets you explicitly allocate real CPU bandwidth
489 to task groups. If enabled, it will also make it impossible to
490 schedule realtime tasks for non-root users until you allocate
491 realtime bandwidth for them.
495 config KERNEL_BLK_CGROUP
496 bool "Block IO controller"
499 Generic block IO controller cgroup interface. This is the common
500 cgroup interface which should be used by various IO controlling
503 Currently, CFQ IO scheduler uses it to recognize task groups and
504 control disk bandwidth allocation (proportional time slice allocation)
505 to such task groups. It is also used by bio throttling logic in
506 block layer to implement upper limit in IO rates on a device.
508 This option only enables generic Block IO controller infrastructure.
509 One needs to also enable actual IO controlling logic/policy. For
510 enabling proportional weight division of disk bandwidth in CFQ, set
511 CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
512 CONFIG_BLK_DEV_THROTTLING=y.
514 config KERNEL_DEBUG_BLK_CGROUP
515 bool "Enable Block IO controller debugging"
517 depends on KERNEL_BLK_CGROUP
519 Enable some debugging help. Currently it exports additional stat
520 files in a cgroup which can be useful for debugging.
522 config KERNEL_NET_CLS_CGROUP
523 bool "Control Group Classifier"
526 config KERNEL_NETPRIO_CGROUP
527 bool "Network priority cgroup"
533 # Namespace support symbols
536 config KERNEL_NAMESPACES
537 bool "Enable kernel namespaces"
546 In this namespace tasks see different info provided
547 with the uname() system call
553 In this namespace tasks work with IPC ids which correspond to
554 different IPC objects in different namespaces.
556 config KERNEL_USER_NS
557 bool "User namespace (EXPERIMENTAL)"
560 This allows containers, i.e. vservers, to use user namespaces
561 to provide different user info for different servers.
564 bool "PID Namespaces"
567 Support process id namespaces. This allows having multiple
568 processes with the same pid as long as they are in different
569 pid namespaces. This is a building block of containers.
572 bool "Network namespace"
575 Allow user space to create what appear to be multiple instances
576 of the network stack.
581 # LXC related symbols
584 config KERNEL_LXC_MISC
585 bool "Enable miscellaneous LXC related options"
590 config KERNEL_DEVPTS_MULTIPLE_INSTANCES
591 bool "Support multiple instances of devpts"
594 Enable support for multiple instances of devpts filesystem.
595 If you want to have isolated PTY namespaces (eg: in containers),
596 say Y here. Otherwise, say N. If enabled, each mount of devpts
597 filesystem with the '-o newinstance' option will create an
598 independent PTY namespace.
600 config KERNEL_POSIX_MQUEUE
601 bool "POSIX Message Queues"
604 POSIX variant of message queues is a part of IPC. In POSIX message
605 queues every message has a priority which decides about succession
606 of receiving it by a process. If you want to compile and run
607 programs written e.g. for Solaris with use of its POSIX message
608 queues (functions mq_*) say Y here.
610 POSIX message queues are visible as a filesystem called 'mqueue'
611 and can be mounted somewhere if you want to do filesystem
612 operations on message queues.
616 comment "Package build options"
620 prompt "Compile packages with debugging info"
623 Adds -g3 to the CFLAGS
627 prompt "Enable IPv6 support in packages"
630 Enable IPV6 support in packages (passes --enable-ipv6 to configure scripts).
632 config PKG_BUILD_PARALLEL
634 prompt "Compile certain packages parallelized"
637 This adds a -jX option to certain packages that are known to
638 behave well for parallel build. By default the package make processes
639 use the main jobserver, in which case this option only takes effect
640 when you add -jX to the make command.
642 If you are unsure, select N.
644 config PKG_BUILD_USE_JOBSERVER
646 prompt "Use top-level make jobserver for packages"
647 depends on PKG_BUILD_PARALLEL
650 This passes the main make process jobserver fds to package builds,
651 enabling full parallelization across different packages
653 Note that disabling this may overcommit CPU resources depending on the
654 -j level of the main make process, the number of package
655 submake jobs selected below and the number of actual CPUs present.
656 Example: If the main make is passed a -j4 and the submake -j
657 is also set to 4, we may end up with 16 parallel make processes
661 config PKG_BUILD_JOBS
663 prompt "Number of package submake jobs (2-512)"
666 depends on PKG_BUILD_PARALLEL && !PKG_BUILD_USE_JOBSERVER
668 The number of jobs (-jX) to pass to packages submake.
670 config PKG_DEFAULT_PARALLEL
672 prompt "Parallelize the default package build rule (May break build)"
673 depends on PKG_BUILD_PARALLEL
677 Always set the default package build rules to parallel build.
679 WARNING: This may break build or kill your cat, as it builds
680 packages with multiple jobs that are probably not tested in
681 a parallel build environment.
683 Only say Y, if you don't mind fixing broken packages.
684 Before reporting build bugs, set this to N and re-run the build.
686 comment "Stripping options"
689 prompt "Binary stripping method"
690 default USE_STRIP if EXTERNAL_TOOLCHAIN
691 default USE_STRIP if USE_GLIBC || USE_EGLIBC || USE_MUSL
694 Select the binary stripping method you wish to use.
699 This will install unstripped binaries (useful for native compiling/debugging)
704 This will install binaries stripped using strip from binutils
710 depends on !USE_GLIBC
711 depends on !USE_EGLIBC
713 This will install binaries stripped using sstrip
718 prompt "Strip arguments"
720 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
721 default "--strip-all"
723 Specifies arguments passed to the strip command when stripping binaries
725 config STRIP_KERNEL_EXPORTS
726 bool "Strip unnecessary exports from the kernel image"
728 Reduces kernel size by stripping unused kernel exports from the kernel image
729 Note that this might make the kernel incompatible with any kernel modules that
730 were not selected at the time the kernel image was created
733 bool "Strip unnecessary functions from libraries"
735 Reduces libraries to only those functions that are necessary for using all
736 selected packages (including those selected as <M>)
737 Note that this will make the system libraries incompatible with most of the packages
738 that are not selected during the build process
741 prompt "Preferred standard C++ library"
742 default USE_LIBSTDCXX if USE_EGLIBC
745 Select the preferred standard C++ library for all packages that support this.
757 bool "Advanced configuration options (for developers)"
761 bool "Show broken platforms / packages" if DEVEL
764 config DOWNLOAD_FOLDER
765 string "Download folder" if DEVEL
769 string "Local mirror for source packages" if DEVEL
773 bool "Automatic rebuild of packages" if DEVEL
776 Automatically rebuild packages when their files change
779 string "Build suffix to append to the BUILD_DIR variable" if DEVEL
782 Build suffix to append to the BUILD_DIR variable, i.e: build_dir_suffix
784 config TARGET_ROOTFS_DIR
785 string "Override the default TARGET_ROOTFS_DIR variable" if DEVEL
788 Override the default TARGET_ROOTFS_DIR variable content $(BUILD_DIR) with custom path.
789 Use this option to re-define the location of the target root file system directory.
792 bool "Use ccache" if DEVEL
795 Compiler cache; see http://ccache.samba.org/
797 config EXTERNAL_KERNEL_TREE
798 string "Use external kernel tree" if DEVEL
801 config KERNEL_GIT_CLONE_URI
802 string "Enter git repository to clone" if DEVEL
805 Enter the full git repository path i.e.:
806 git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
807 This will create a git clone of the kernel in your build
810 config KERNEL_GIT_LOCAL_REPOSITORY
811 string "Enter path to local reference repository" if DEVEL
814 Enter a full pathname to a local reference git repository.
815 In this instance, the --refererence option of git clone will
816 be used thus creating a quick local clone of your repo.
819 bool "Enable log files during build process" if DEVEL
821 If enabled log files will be written to the ./log directory
823 config SRC_TREE_OVERRIDE
824 bool "Enable package source tree override" if DEVEL
826 If enabled, you can force a package to use a git tree as source
827 code instead of the normal tarball. Create a symlink 'git-src'
828 in the package directory, pointing to the .git tree that you want
829 to pull the source code from
831 menuconfig TARGET_OPTIONS
832 bool "Target Options" if DEVEL
834 config TARGET_OPTIMIZATION
835 string "Target Optimizations" if TARGET_OPTIONS
836 default DEFAULT_TARGET_OPTIMIZATION
838 Optimizations to use when building for the target host.
841 bool "Use software floating point by default" if TARGET_OPTIONS
843 depends on (arm || armeb || powerpc || mipsel || mips || mips64el || mips64) && !HAS_FPU
845 If your target CPU does not have a Floating Point Unit (FPU) or a
846 kernel FPU emulator, but you still wish to support floating point
847 functions, then everything will need to be compiled with soft floating
848 point support (-msoft-float).
850 Most people will answer N.
853 bool "Build packages with MIPS16 instructions" if TARGET_OPTIONS
854 depends on HAS_MIPS16
856 If your target CPU does support the MIPS16 instruction set
857 and you want to use it for packages, enable this option.
858 MIPS16 produces smaller binaries thus reducing pressure on
861 Most people will answer N.
863 source "toolchain/Config.in"
865 source "target/imagebuilder/Config.in"
866 source "target/sdk/Config.in"
867 source "target/toolchain/Config.in"
869 source "tmp/.config-package.in"