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
142 config TARGET_ROOTFS_INCLUDE_KERNEL
143 bool "include kernel in rootfs"
144 depends on TARGET_ROOTFS_UBIFS || TARGET_ROOTFS_EXT4FS
145 default n if USES_UBIFS
147 Include the kernel image in the rootfs
149 config TARGET_ROOTFS_INCLUDE_DTB
150 bool "include dtb in rootfs"
151 depends on TARGET_ROOTFS_UBIFS || TARGET_ROOTFS_EXT4FS
152 default n if USES_UBIFS
154 Include the device tree blob file in the rootfs
158 menu "Global build settings"
161 bool "Select all packages by default"
164 comment "General build options"
166 config DISPLAY_SUPPORT
167 bool "Show packages that require graphics support (local or remote)"
170 config BUILD_PATENTED
172 bool "Compile with support for patented functionality"
174 When this option is disabled, software which provides patented functionality will not be built.
175 In case software provides optional support for patented functionality,
176 this optional support will get disabled for this package.
180 bool "Compile with full language support"
182 When this option is enabled, packages are built with the full versions of iconv and GNU gettext
183 instead of the default OpenWrt stubs. If uClibc is used, it is also built with locale support.
185 config BUILD_STATIC_TOOLS
187 bool "Attempt to link host utilities statically"
189 Linking host utilities like sed or firmware-utils statically increases the portability of the
190 generated ImageBuilder and SDK tarballs, however it may fail on some Linux distributions.
192 config SHADOW_PASSWORDS
194 prompt "Enable shadow password support"
197 Enable shadow password support.
201 prompt "Remove ipkg/opkg status data files in final images"
204 This removes all ipkg/opkg status data files from the target directory before building the root fs
206 config COLLECT_KERNEL_DEBUG
208 prompt "Collect kernel debug information"
209 select KERNEL_DEBUG_INFO
212 This collects debugging symbols from the kernel and all compiled modules.
213 Useful for release builds, so that kernel issues can be debugged offline later.
215 comment "Kernel build options"
217 config KERNEL_DEBUG_FS
218 bool "Compile the kernel with Debug FileSystem enabled"
221 debugfs is a virtual file system that kernel developers use to put
222 debugging files into. Enable this option to be able to read and
223 write to these files.
225 config KERNEL_PERF_EVENTS
229 config KERNEL_PROFILING
230 bool "Compile the kernel with profiling enabled"
232 select KERNEL_PERF_EVENTS
234 Enable the extended profiling support mechanisms used by profilers such
237 config KERNEL_KALLSYMS
238 bool "Compile the kernel with symbol table information"
241 This will give you more information in stack traces from kernel oopses
244 bool "Compile the kernel with tracing support"
247 config KERNEL_FTRACE_SYSCALLS
248 bool "Trace system calls"
249 depends on KERNEL_FTRACE
252 config KERNEL_ENABLE_DEFAULT_TRACERS
253 bool "Trace process context switches and events"
254 depends on KERNEL_FTRACE
257 config KERNEL_DEBUG_KERNEL
261 config KERNEL_DEBUG_INFO
262 bool "Compile the kernel with debug information"
264 select KERNEL_DEBUG_KERNEL
266 This will compile your kernel and modules with debug information.
268 config KERNEL_DEBUG_LL_UART_NONE
273 config KERNEL_DEBUG_LL
277 select KERNEL_DEBUG_LL_UART_NONE
279 ARM low level debugging
281 config KERNEL_EARLY_PRINTK
282 bool "Compile the kernel with early printk"
285 select KERNEL_DEBUG_KERNEL
286 select KERNEL_DEBUG_LL if arm
288 Compile the kernel with early printk support.
289 This is only useful for debugging purposes to send messages
290 over the serial console in early boot.
291 Enable this to debug early boot problems.
294 bool "Compile the kernel with asynchronous IO support"
297 config KERNEL_DIRECT_IO
298 bool "Compile the kernel with direct IO support"
301 config KERNEL_MAGIC_SYSRQ
302 bool "Compile the kernel with SysRq support"
305 config KERNEL_COREDUMP
308 config KERNEL_ELF_CORE
309 bool "Enable process core dump support"
310 select KERNEL_COREDUMP
313 config KERNEL_PROVE_LOCKING
314 bool "Enable kernel lock checking"
315 select KERNEL_DEBUG_KERNEL
318 config KERNEL_PRINTK_TIME
319 bool "Enable printk timestamps"
326 bool "Enable kexec support"
329 # CGROUP support symbols
332 config KERNEL_CGROUPS
333 bool "Enable kernel cgroups"
338 config KERNEL_CGROUP_DEBUG
339 bool "Example debug cgroup subsystem"
342 This option enables a simple cgroup subsystem that
343 exports useful debugging information about the cgroups
346 config KERNEL_FREEZER
348 default y if KERNEL_CGROUP_FREEZER
350 config KERNEL_CGROUP_FREEZER
351 bool "Freezer cgroup subsystem"
354 Provides a way to freeze and unfreeze all tasks in a
357 config KERNEL_CGROUP_DEVICE
358 bool "Device controller for cgroups"
361 Provides a cgroup implementing whitelists for devices which
362 a process in the cgroup can mknod or open.
364 config KERNEL_CPUSETS
365 bool "Cpuset support"
368 This option will let you create and manage CPUSETs which
369 allow dynamically partitioning a system into sets of CPUs and
370 Memory Nodes and assigning tasks to run only within those sets.
371 This is primarily useful on large SMP or NUMA systems.
373 config KERNEL_PROC_PID_CPUSET
374 bool "Include legacy /proc/<pid>/cpuset file"
376 depends on KERNEL_CPUSETS
378 config KERNEL_CGROUP_CPUACCT
379 bool "Simple CPU accounting cgroup subsystem"
382 Provides a simple Resource Controller for monitoring the
383 total CPU consumed by the tasks in a cgroup.
385 config KERNEL_RESOURCE_COUNTERS
386 bool "Resource counters"
389 This option enables controller independent resource accounting
390 infrastructure that works with cgroups.
392 config KERNEL_MM_OWNER
394 default y if KERNEL_MEMCG
397 bool "Memory Resource Controller for Control Groups"
399 depends on KERNEL_RESOURCE_COUNTERS
401 Provides a memory resource controller that manages both anonymous
402 memory and page cache. (See Documentation/cgroups/memory.txt)
404 Note that setting this option increases fixed memory overhead
405 associated with each page of memory in the system. By this,
406 20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
407 usage tracking struct at boot. Total amount of this is printed out
410 Only enable when you're ok with these trade offs and really
411 sure you need the memory resource controller. Even when you enable
412 this, you can set "cgroup_disable=memory" at your boot option to
413 disable memory resource controller and you can avoid overheads.
414 (and lose benefits of memory resource controller)
416 This config option also selects MM_OWNER config option, which
417 could in turn add some fork/exit overhead.
419 config KERNEL_MEMCG_SWAP
420 bool "Memory Resource Controller Swap Extension"
422 depends on KERNEL_MEMCG
424 Add swap management feature to memory resource controller. When you
425 enable this, you can limit mem+swap usage per cgroup. In other words,
426 when you disable this, memory resource controller has no cares to
427 usage of swap...a process can exhaust all of the swap. This extension
428 is useful when you want to avoid exhaustion swap but this itself
429 adds more overheads and consumes memory for remembering information.
430 Especially if you use 32bit system or small memory system, please
431 be careful about enabling this. When memory resource controller
432 is disabled by boot option, this will be automatically disabled and
433 there will be no overhead from this. Even when you set this config=y,
434 if boot option "swapaccount=0" is set, swap will not be accounted.
435 Now, memory usage of swap_cgroup is 2 bytes per entry. If swap page
436 size is 4096bytes, 512k per 1Gbytes of swap.
438 config KERNEL_MEMCG_SWAP_ENABLED
439 bool "Memory Resource Controller Swap Extension enabled by default"
441 depends on KERNEL_MEMCG_SWAP
443 Memory Resource Controller Swap Extension comes with its price in
444 a bigger memory consumption. General purpose distribution kernels
445 which want to enable the feature but keep it disabled by default
446 and let the user enable it by swapaccount boot command line
447 parameter should have this option unselected.
448 For those who want to have the feature enabled by default should
449 select this option (if, for some reason, they need to disable it
450 then swapaccount=0 does the trick).
453 config KERNEL_MEMCG_KMEM
454 bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)"
456 depends on KERNEL_MEMCG
458 The Kernel Memory extension for Memory Resource Controller can limit
459 the amount of memory used by kernel objects in the system. Those are
460 fundamentally different from the entities handled by the standard
461 Memory Controller, which are page-based, and can be swapped. Users of
462 the kmem extension can use it to guarantee that no group of processes
463 will ever exhaust kernel resources alone.
465 config KERNEL_CGROUP_PERF
466 bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
468 select KERNEL_PERF_EVENTS
470 This option extends the per-cpu mode to restrict monitoring to
471 threads which belong to the cgroup specified and run on the
474 menuconfig KERNEL_CGROUP_SCHED
475 bool "Group CPU scheduler"
478 This feature lets CPU scheduler recognize task groups and control CPU
479 bandwidth allocation to such task groups. It uses cgroups to group
482 if KERNEL_CGROUP_SCHED
484 config KERNEL_FAIR_GROUP_SCHED
485 bool "Group scheduling for SCHED_OTHER"
488 config KERNEL_CFS_BANDWIDTH
489 bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
491 depends on KERNEL_FAIR_GROUP_SCHED
493 This option allows users to define CPU bandwidth rates (limits) for
494 tasks running within the fair group scheduler. Groups with no limit
495 set are considered to be unconstrained and will run with no
497 See tip/Documentation/scheduler/sched-bwc.txt for more information.
499 config KERNEL_RT_GROUP_SCHED
500 bool "Group scheduling for SCHED_RR/FIFO"
503 This feature lets you explicitly allocate real CPU bandwidth
504 to task groups. If enabled, it will also make it impossible to
505 schedule realtime tasks for non-root users until you allocate
506 realtime bandwidth for them.
510 config KERNEL_BLK_CGROUP
511 bool "Block IO controller"
514 Generic block IO controller cgroup interface. This is the common
515 cgroup interface which should be used by various IO controlling
518 Currently, CFQ IO scheduler uses it to recognize task groups and
519 control disk bandwidth allocation (proportional time slice allocation)
520 to such task groups. It is also used by bio throttling logic in
521 block layer to implement upper limit in IO rates on a device.
523 This option only enables generic Block IO controller infrastructure.
524 One needs to also enable actual IO controlling logic/policy. For
525 enabling proportional weight division of disk bandwidth in CFQ, set
526 CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
527 CONFIG_BLK_DEV_THROTTLING=y.
529 config KERNEL_DEBUG_BLK_CGROUP
530 bool "Enable Block IO controller debugging"
532 depends on KERNEL_BLK_CGROUP
534 Enable some debugging help. Currently it exports additional stat
535 files in a cgroup which can be useful for debugging.
537 config KERNEL_NET_CLS_CGROUP
538 bool "Control Group Classifier"
541 config KERNEL_NETPRIO_CGROUP
542 bool "Network priority cgroup"
548 # Namespace support symbols
551 config KERNEL_NAMESPACES
552 bool "Enable kernel namespaces"
561 In this namespace tasks see different info provided
562 with the uname() system call
568 In this namespace tasks work with IPC ids which correspond to
569 different IPC objects in different namespaces.
571 config KERNEL_USER_NS
572 bool "User namespace (EXPERIMENTAL)"
575 This allows containers, i.e. vservers, to use user namespaces
576 to provide different user info for different servers.
579 bool "PID Namespaces"
582 Support process id namespaces. This allows having multiple
583 processes with the same pid as long as they are in different
584 pid namespaces. This is a building block of containers.
587 bool "Network namespace"
590 Allow user space to create what appear to be multiple instances
591 of the network stack.
596 # LXC related symbols
599 config KERNEL_LXC_MISC
600 bool "Enable miscellaneous LXC related options"
605 config KERNEL_DEVPTS_MULTIPLE_INSTANCES
606 bool "Support multiple instances of devpts"
609 Enable support for multiple instances of devpts filesystem.
610 If you want to have isolated PTY namespaces (eg: in containers),
611 say Y here. Otherwise, say N. If enabled, each mount of devpts
612 filesystem with the '-o newinstance' option will create an
613 independent PTY namespace.
615 config KERNEL_POSIX_MQUEUE
616 bool "POSIX Message Queues"
619 POSIX variant of message queues is a part of IPC. In POSIX message
620 queues every message has a priority which decides about succession
621 of receiving it by a process. If you want to compile and run
622 programs written e.g. for Solaris with use of its POSIX message
623 queues (functions mq_*) say Y here.
625 POSIX message queues are visible as a filesystem called 'mqueue'
626 and can be mounted somewhere if you want to do filesystem
627 operations on message queues.
631 comment "Package build options"
635 prompt "Compile packages with debugging info"
638 Adds -g3 to the CFLAGS
642 prompt "Enable IPv6 support in packages"
645 Enable IPV6 support in packages (passes --enable-ipv6 to configure scripts).
647 config PKG_BUILD_PARALLEL
649 prompt "Compile certain packages parallelized"
652 This adds a -jX option to certain packages that are known to
653 behave well for parallel build. By default the package make processes
654 use the main jobserver, in which case this option only takes effect
655 when you add -jX to the make command.
657 If you are unsure, select N.
659 config PKG_BUILD_USE_JOBSERVER
661 prompt "Use top-level make jobserver for packages"
662 depends on PKG_BUILD_PARALLEL
665 This passes the main make process jobserver fds to package builds,
666 enabling full parallelization across different packages
668 Note that disabling this may overcommit CPU resources depending on the
669 -j level of the main make process, the number of package
670 submake jobs selected below and the number of actual CPUs present.
671 Example: If the main make is passed a -j4 and the submake -j
672 is also set to 4, we may end up with 16 parallel make processes
676 config PKG_BUILD_JOBS
678 prompt "Number of package submake jobs (2-512)"
681 depends on PKG_BUILD_PARALLEL && !PKG_BUILD_USE_JOBSERVER
683 The number of jobs (-jX) to pass to packages submake.
685 config PKG_DEFAULT_PARALLEL
687 prompt "Parallelize the default package build rule (May break build)"
688 depends on PKG_BUILD_PARALLEL
692 Always set the default package build rules to parallel build.
694 WARNING: This may break build or kill your cat, as it builds
695 packages with multiple jobs that are probably not tested in
696 a parallel build environment.
698 Only say Y, if you don't mind fixing broken packages.
699 Before reporting build bugs, set this to N and re-run the build.
701 comment "Stripping options"
704 prompt "Binary stripping method"
705 default USE_STRIP if EXTERNAL_TOOLCHAIN
706 default USE_STRIP if USE_GLIBC || USE_EGLIBC || USE_MUSL
709 Select the binary stripping method you wish to use.
714 This will install unstripped binaries (useful for native compiling/debugging)
719 This will install binaries stripped using strip from binutils
725 depends on !USE_GLIBC
726 depends on !USE_EGLIBC
728 This will install binaries stripped using sstrip
733 prompt "Strip arguments"
735 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
736 default "--strip-all"
738 Specifies arguments passed to the strip command when stripping binaries
740 config STRIP_KERNEL_EXPORTS
741 bool "Strip unnecessary exports from the kernel image"
743 Reduces kernel size by stripping unused kernel exports from the kernel image
744 Note that this might make the kernel incompatible with any kernel modules that
745 were not selected at the time the kernel image was created
748 bool "Strip unnecessary functions from libraries"
750 Reduces libraries to only those functions that are necessary for using all
751 selected packages (including those selected as <M>)
752 Note that this will make the system libraries incompatible with most of the packages
753 that are not selected during the build process
756 prompt "Preferred standard C++ library"
757 default USE_LIBSTDCXX if USE_EGLIBC
760 Select the preferred standard C++ library for all packages that support this.
772 bool "Advanced configuration options (for developers)"
776 bool "Show broken platforms / packages" if DEVEL
779 config DOWNLOAD_FOLDER
780 string "Download folder" if DEVEL
784 string "Local mirror for source packages" if DEVEL
788 bool "Automatic rebuild of packages" if DEVEL
791 Automatically rebuild packages when their files change
794 string "Build suffix to append to the BUILD_DIR variable" if DEVEL
797 Build suffix to append to the BUILD_DIR variable, i.e: build_dir_suffix
799 config TARGET_ROOTFS_DIR
800 string "Override the default TARGET_ROOTFS_DIR variable" if DEVEL
803 Override the default TARGET_ROOTFS_DIR variable content $(BUILD_DIR) with custom path.
804 Use this option to re-define the location of the target root file system directory.
807 bool "Use ccache" if DEVEL
810 Compiler cache; see http://ccache.samba.org/
812 config EXTERNAL_KERNEL_TREE
813 string "Use external kernel tree" if DEVEL
816 config KERNEL_GIT_CLONE_URI
817 string "Enter git repository to clone" if DEVEL
820 Enter the full git repository path i.e.:
821 git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
822 This will create a git clone of the kernel in your build
825 config KERNEL_GIT_LOCAL_REPOSITORY
826 string "Enter path to local reference repository" if DEVEL
829 Enter a full pathname to a local reference git repository.
830 In this instance, the --refererence option of git clone will
831 be used thus creating a quick local clone of your repo.
834 bool "Enable log files during build process" if DEVEL
836 If enabled log files will be written to the ./log directory
838 config SRC_TREE_OVERRIDE
839 bool "Enable package source tree override" if DEVEL
841 If enabled, you can force a package to use a git tree as source
842 code instead of the normal tarball. Create a symlink 'git-src'
843 in the package directory, pointing to the .git tree that you want
844 to pull the source code from
846 menuconfig TARGET_OPTIONS
847 bool "Target Options" if DEVEL
849 config TARGET_OPTIMIZATION
850 string "Target Optimizations" if TARGET_OPTIONS
851 default DEFAULT_TARGET_OPTIMIZATION
853 Optimizations to use when building for the target host.
856 bool "Use software floating point by default" if TARGET_OPTIONS
858 depends on (arm || armeb || powerpc || mipsel || mips || mips64el || mips64) && !HAS_FPU
860 If your target CPU does not have a Floating Point Unit (FPU) or a
861 kernel FPU emulator, but you still wish to support floating point
862 functions, then everything will need to be compiled with soft floating
863 point support (-msoft-float).
865 Most people will answer N.
868 bool "Build packages with MIPS16 instructions" if TARGET_OPTIONS
869 depends on HAS_MIPS16
871 If your target CPU does support the MIPS16 instruction set
872 and you want to use it for packages, enable this option.
873 MIPS16 produces smaller binaries thus reducing pressure on
876 Most people will answer N.
878 source "toolchain/Config.in"
880 source "target/imagebuilder/Config.in"
881 source "target/sdk/Config.in"
882 source "target/toolchain/Config.in"
884 source "tmp/.config-package.in"