kernel: make tracing support configurable
[openwrt/svn-archive/archive.git] / Config.in
1 # Copyright (C) 2006-2010 OpenWrt.org
2 #
3 # This is free software, licensed under the GNU General Public License v2.
4 # See /LICENSE for more information.
5 #
6
7 mainmenu "OpenWrt Configuration"
8
9 config HAVE_DOT_CONFIG
10 bool
11 default y
12
13 source "target/Config.in"
14
15 menu "Target Images"
16
17 menuconfig TARGET_ROOTFS_INITRAMFS
18 bool "ramdisk"
19 default y if USES_INITRAMFS
20 help
21 Embed the rootfs into the kernel (initramfs)
22
23 choice
24 prompt "Compression"
25 default TARGET_INITRAMFS_COMPRESSION_LZMA if TARGET_ar71xx
26 default TARGET_INITRAMFS_COMPRESSION_LZMA if TARGET_ramips
27 default TARGET_INITRAMFS_COMPRESSION_NONE
28 depends TARGET_ROOTFS_INITRAMFS
29 help
30 Select ramdisk compression.
31
32 config TARGET_INITRAMFS_COMPRESSION_NONE
33 bool "none"
34
35 config TARGET_INITRAMFS_COMPRESSION_GZIP
36 bool "gzip"
37
38 config TARGET_INITRAMFS_COMPRESSION_BZIP2
39 bool "bzip2"
40
41 config TARGET_INITRAMFS_COMPRESSION_LZMA
42 bool "lzma"
43
44 config TARGET_INITRAMFS_COMPRESSION_LZO
45 bool "lzo"
46
47 config TARGET_INITRAMFS_COMPRESSION_XZ
48 bool "xz"
49 depends !LINUX_2_6_30&&!LINUX_2_6_31&&!LINUX_2_6_32&&!LINUX_2_6_36&&!LINUX_2_6_37
50 endchoice
51
52 config EXTERNAL_CPIO
53 string
54 prompt "Use external cpio" if TARGET_ROOTFS_INITRAMFS
55 default ""
56 help
57 Kernel uses specified external cpio as INITRAMFS_SOURCE
58
59 comment "Root filesystem archives"
60
61 config TARGET_ROOTFS_CPIOGZ
62 bool "cpio.gz"
63 default y if USES_CPIOGZ
64 help
65 Build a compressed cpio archive of the the root filesystem
66
67 config TARGET_ROOTFS_TARGZ
68 bool "tar.gz"
69 default y if USES_TARGZ
70 help
71 Build a compressed tar archive of the the root filesystem
72
73 comment "Root filesystem images"
74
75 config TARGET_ROOTFS_EXT4FS
76 bool "ext4"
77 default y if USES_EXT4
78 depends !TARGET_ROOTFS_INITRAMFS
79 help
80 Ext4 file system with some free space for uml images
81
82 config TARGET_ROOTFS_ISO
83 bool "iso"
84 default n
85 depends TARGET_ROOTFS_INITRAMFS && TARGET_x86
86 help
87 Create some bootable ISO image
88
89 config TARGET_ROOTFS_JFFS2
90 bool "jffs2"
91 default y if USES_JFFS2
92 depends !TARGET_ROOTFS_INITRAMFS
93 help
94 Build a jffs2 root filesystem
95
96 config TARGET_ROOTFS_SQUASHFS
97 bool "squashfs"
98 default y if USES_SQUASHFS
99 depends !TARGET_ROOTFS_INITRAMFS
100 help
101 Build a squashfs-lzma root filesystem
102
103 config TARGET_ROOTFS_UBIFS
104 bool "ubifs"
105 default y if USES_UBIFS
106 depends !TARGET_ROOTFS_INITRAMFS && USES_UBIFS
107 help
108 Build a ubifs root filesystem
109
110 comment "Image Options"
111
112 source "target/linux/*/image/Config.in"
113
114 config TARGET_ROOTFS_PARTSIZE
115 int "Root filesystem partition size (in MB)"
116 depends X86_GRUB_IMAGES || TARGET_ROOTFS_EXT4FS || TARGET_rb532
117 default 48
118 help
119 Allows you to change the root filesystem partition size
120
121 config TARGET_ROOTFS_MAXINODE
122 int "Maximum number of inodes in root filesystem"
123 depends TARGET_ROOTFS_EXT4FS
124 default 6000
125 help
126 Allows you to change the maximum number of inodes in the root filesystem
127
128 endmenu
129
130 menu "Global build settings"
131
132 config ALL
133 bool "Select all packages by default"
134 default n
135
136 comment "General build options"
137
138 config DISPLAY_SUPPORT
139 bool "Show packages that require graphics support (local or remote)"
140 default n
141
142 config BUILD_PATENTED
143 default y
144 bool "Compile with support for patented functionality"
145 help
146 When this option is disabled, software which provides patented functionality will not be built.
147 In case software provides optional support for patented functionality,
148 this optional support will get disabled for this package.
149
150 config BUILD_NLS
151 default n
152 bool "Compile with full language support"
153 help
154 When this option is enabled, packages are built with the full versions of iconv and GNU gettext
155 instead of the default OpenWrt stubs. If uClibc is used, it is also built with locale support.
156
157 config SHADOW_PASSWORDS
158 bool
159 prompt "Enable shadow password support"
160 default y
161 help
162 Enable shadow password support.
163
164 config CLEAN_IPKG
165 bool
166 prompt "Remove ipkg/opkg status data files in final images"
167 default n
168 help
169 This removes all ipkg/opkg status data files from the target directory before building the root fs
170
171 config COLLECT_KERNEL_DEBUG
172 bool
173 prompt "Collect kernel debug information"
174 select KERNEL_DEBUG_INFO
175 default n
176 help
177 This collects debugging symbols from the kernel and all compiled modules.
178 Useful for release builds, so that kernel issues can be debugged offline later.
179
180 comment "Kernel build options"
181
182 config KERNEL_DEBUG_FS
183 bool "Compile the kernel with Debug FileSystem enabled"
184 default y
185 help
186 debugfs is a virtual file system that kernel developers use to put
187 debugging files into. Enable this option to be able to read and
188 write to these files.
189
190 config KERNEL_PROFILING
191 bool "Compile the kernel with profiling enabled"
192 default n
193 help
194 Enable the extended profiling support mechanisms used by profilers such
195 as OProfile.
196
197 config KERNEL_KALLSYMS
198 bool "Compile the kernel with symbol table information"
199 default n
200 help
201 This will give you more information in stack traces from kernel oopses
202
203 config KERNEL_FTRACE
204 bool "Compile the kernel with tracing support"
205 default n
206
207 config KERNEL_ENABLE_DEFAULT_TRACERS
208 bool "Trace process context switches and events"
209 depends on KERNEL_FTRACE
210 default n
211
212 config KERNEL_DEBUG_KERNEL
213 bool
214 default n
215
216 config KERNEL_DEBUG_INFO
217 bool "Compile the kernel with debug information"
218 default n
219 select KERNEL_DEBUG_KERNEL
220 help
221 This will compile your kernel and modules with debug information.
222
223 config KERNEL_DEBUG_LL
224 bool
225 default n
226 depends on arm
227 help
228 ARM low level debugging
229
230 config KERNEL_EARLY_PRINTK
231 bool "Compile the kernel with early printk"
232 default n
233 depends on arm
234 select KERNEL_DEBUG_KERNEL
235 select KERNEL_DEBUG_LL if arm
236 help
237 Compile the kernel with early printk support.
238 This is only useful for debugging purposes to send messages
239 over the serial console in early boot.
240 Enable this to debug early boot problems.
241
242 config KERNEL_AIO
243 bool "Compile the kernel with asynchronous IO support"
244 default n
245
246 config KERNEL_MAGIC_SYSRQ
247 bool "Compile the kernel with SysRq support"
248 default y
249
250 config KERNEL_ELF_CORE
251 bool "Enable process core dump support"
252 default y
253
254 config KERNEL_PROVE_LOCKING
255 bool "Enable kernel lock checking"
256 select KERNEL_DEBUG_KERNEL
257 default n
258
259 config KERNEL_PRINTK_TIME
260 bool "Enable printk timestamps"
261 default y
262
263 comment "Package build options"
264
265 config DEBUG
266 bool
267 prompt "Compile packages with debugging info"
268 default n
269 help
270 Adds -g3 to the CFLAGS
271
272 config IPV6
273 bool
274 prompt "Enable IPv6 support in packages"
275 default y
276 help
277 Enable IPV6 support in packages (passes --enable-ipv6 to configure scripts).
278
279 config PKG_BUILD_PARALLEL
280 bool
281 prompt "Compile certain packages parallelized"
282 default n
283 help
284 This adds a -jX option to certain packages that are known to
285 behave well for parallel build.
286
287 Note that this may overcommit CPU resources depending on the
288 -j level of the main make process, the number of package
289 submake jobs selected below and the number of actual CPUs present.
290 Example: If the main make is passed a -j4 and the submake -j
291 is also set to 4, we may end up with 16 parallel make processes
292 in the worst case.
293
294 You get maximum build performance, if you set the package build
295 jobs to the number of CPUs (cores) available and also start the main
296 make process with -jX, where X is the number of CPUs (cores).
297 However, make sure you have enough RAM available for
298 NR_CPUS to the power of two (NR_CPUS^2) make jobs.
299
300 If you are unsure, select N.
301
302 config PKG_BUILD_JOBS
303 int
304 prompt "Number of package submake jobs (2-512)"
305 range 2 512
306 default 2
307 depends on PKG_BUILD_PARALLEL
308 help
309 The number of jobs (-jX) to pass to packages submake.
310
311 config PKG_DEFAULT_PARALLEL
312 bool
313 prompt "Parallelize the default package build rule (May break build)"
314 depends on PKG_BUILD_PARALLEL
315 default n
316 help
317 Always set the default package build rules to parallel build.
318
319 WARNING: This may break build or kill your cat, as it builds
320 packages with multiple jobs that are probably not tested in
321 a parallel build environment.
322
323 Only say Y, if you don't mind fixing broken packages.
324 Before reporting build bugs, set this to N and re-run the build.
325
326 config TOOLCHAIN_PARALLEL
327 bool
328 prompt "Parallelize the toolchain build (May break build)"
329 depends on PKG_BUILD_PARALLEL
330 default n
331 help
332 Build the toolchain with parallel make jobs.
333 This speeds up the toolchain build on SMP machines, but may
334 break the build for certain toolchain versions.
335
336 If you say Y, toolchain build might break.
337 Before reporting build bugs, set this to N and re-run the build.
338
339 comment "Stripping options"
340
341 choice
342 prompt "Binary stripping method"
343 default USE_STRIP if EXTERNAL_TOOLCHAIN
344 default USE_STRIP if USE_GLIBC || USE_EGLIBC
345 default USE_SSTRIP
346 help
347 Select the binary stripping method you wish to use.
348
349 config NO_STRIP
350 bool "none"
351 help
352 This will install unstripped binaries (useful for native compiling/debugging)
353
354 config USE_STRIP
355 bool "strip"
356 help
357 This will install binaries stripped using strip from binutils
358
359
360 config USE_SSTRIP
361 bool "sstrip"
362 depends !DEBUG
363 depends !USE_GLIBC
364 depends !USE_EGLIBC
365 help
366 This will install binaries stripped using sstrip
367 endchoice
368
369 config STRIP_ARGS
370 string
371 prompt "Strip arguments"
372 depends USE_STRIP
373 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
374 default "--strip-all"
375 help
376 Specifies arguments passed to the strip command when stripping binaries
377
378 config STRIP_KERNEL_EXPORTS
379 bool "Strip unnecessary exports from the kernel image"
380 help
381 Reduces kernel size by stripping unused kernel exports from the kernel image
382 Note that this might make the kernel incompatible with any kernel modules that
383 were not selected at the time the kernel image was created
384
385 config USE_MKLIBS
386 bool "Strip unnecessary functions from libraries"
387 help
388 Reduces libraries to only those functions that are necessary for using all
389 selected packages (including those selected as <M>)
390 Note that this will make the system libraries incompatible with most of the packages
391 that are not selected during the build process
392
393 endmenu
394
395 menuconfig DEVEL
396 bool "Advanced configuration options (for developers)"
397 default n
398
399 config BROKEN
400 bool "Show broken platforms / packages" if DEVEL
401 default n
402
403 config DOWNLOAD_FOLDER
404 string "Download folder" if DEVEL
405 default ""
406
407 config LOCALMIRROR
408 string "Local mirror for source packages" if DEVEL
409 default ""
410
411 config AUTOREBUILD
412 bool "Automatic rebuild of packages" if DEVEL
413 default y
414 help
415 Automatically rebuild packages when their files change
416
417 config BUILD_SUFFIX
418 string "Build suffix to append to the BUILD_DIR variable" if DEVEL
419 default ""
420 help
421 Build suffix to append to the BUILD_DIR variable, i.e: build_dir_suffix
422
423 config TARGET_ROOTFS_DIR
424 string "Override the default TARGET_ROOTFS_DIR variable" if DEVEL
425 default ""
426 help
427 Override the default TARGET_ROOTFS_DIR variable content $(BUILD_DIR) with custom path.
428 Use this option to re-define the location of the target root file system directory.
429
430 config CCACHE
431 bool "Use ccache" if DEVEL
432 default n
433 help
434 Compiler cache; see http://ccache.samba.org/
435
436 config EXTERNAL_KERNEL_TREE
437 string "Use external kernel tree" if DEVEL
438 default ""
439
440 config KERNEL_GIT_CLONE_URI
441 string "Enter git repository to clone" if DEVEL
442 default ""
443 help
444 Enter the full git repository path i.e.:
445 git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
446 This will create a git clone of the kernel in your build
447 directory.
448
449 config KERNEL_GIT_LOCAL_REPOSITORY
450 string "Enter path to local reference repository" if DEVEL
451 default ""
452 help
453 Enter a full pathname to a local reference git repository.
454 In this instance, the --refererence option of git clone will
455 be used thus creating a quick local clone of your repo.
456
457 config BUILD_LOG
458 bool "Enable log files during build process" if DEVEL
459 help
460 If enabled log files will be written to the ./log directory
461
462 config SRC_TREE_OVERRIDE
463 bool "Enable package source tree override" if DEVEL
464 help
465 If enabled, you can force a package to use a git tree as source
466 code instead of the normal tarball. Create a symlink 'git-src'
467 in the package directory, pointing to the .git tree that you want
468 to pull the source code from
469
470 menuconfig TARGET_OPTIONS
471 bool "Target Options" if DEVEL
472
473 config TARGET_OPTIMIZATION
474 string "Target Optimizations" if TARGET_OPTIONS
475 default DEFAULT_TARGET_OPTIMIZATION
476 help
477 Optimizations to use when building for the target host.
478
479 config SOFT_FLOAT
480 bool "Use software floating point by default" if TARGET_OPTIONS
481 default y
482 depends on (arm || armeb || powerpc || mipsel || mips) && !HAS_FPU
483 help
484 If your target CPU does not have a Floating Point Unit (FPU) or a
485 kernel FPU emulator, but you still wish to support floating point
486 functions, then everything will need to be compiled with soft floating
487 point support (-msoft-float).
488
489 Most people will answer N.
490
491 source "toolchain/Config.in"
492
493 source "target/imagebuilder/Config.in"
494 source "target/sdk/Config.in"
495 source "target/toolchain/Config.in"
496
497 source "tmp/.config-package.in"