6a6fb2882c0905e73f717a6162744aa471f85c05
[openwrt/openwrt.git] / config / Config-build.in
1 # Copyright (C) 2006-2013 OpenWrt.org
2 # Copyright (C) 2016 LEDE Project
3 #
4 # This is free software, licensed under the GNU General Public License v2.
5 # See /LICENSE for more information.
6 #
7
8 menu "Global build settings"
9
10 config JSON_ADD_IMAGE_INFO
11 bool "Create JSON info files per build image"
12 default BUILDBOT
13 help
14 The JSON info files contain information about the device and
15 build images, stored next to the firmware images.
16
17 config ALL_NONSHARED
18 bool "Select all target specific packages by default"
19 select ALL_KMODS
20 default BUILDBOT
21
22 config ALL_KMODS
23 bool "Select all kernel module packages by default"
24
25 config ALL
26 bool "Select all userspace packages by default"
27 select ALL_KMODS
28 select ALL_NONSHARED
29
30 config BUILDBOT
31 bool "Set build defaults for automatic builds (e.g. via buildbot)"
32 default n
33 help
34 This option changes several defaults to be more suitable for
35 automatic builds. This includes the following changes:
36 - Deleting build directories after compiling (to save space)
37 - Enabling per-device rootfs support
38 ...
39
40 config SIGNED_PACKAGES
41 bool "Cryptographically signed package lists"
42 default y
43
44 config SIGNATURE_CHECK
45 bool "Enable signature checking in opkg"
46 default SIGNED_PACKAGES
47
48 comment "General build options"
49
50 config TESTING_KERNEL
51 bool "Use the testing kernel version"
52 depends on HAS_TESTING_KERNEL
53 default n
54 help
55 If the target supports a newer kernel version than the default,
56 you can use this config option to enable it
57
58
59 config DISPLAY_SUPPORT
60 bool "Show packages that require graphics support (local or remote)"
61 default n
62
63 config BUILD_PATENTED
64 default n
65 bool "Compile with support for patented functionality"
66 help
67 When this option is disabled, software which provides patented functionality
68 will not be built. In case software provides optional support for patented
69 functionality, this optional support will get disabled for this package.
70
71 config BUILD_NLS
72 default n
73 bool "Compile with full language support"
74 help
75 When this option is enabled, packages are built with the full versions of
76 iconv and GNU gettext instead of the default OpenWrt stubs. If uClibc is
77 used, it is also built with locale support.
78
79 config SHADOW_PASSWORDS
80 bool
81 default y
82
83 config CLEAN_IPKG
84 bool
85 prompt "Remove ipkg/opkg status data files in final images"
86 default n
87 help
88 This removes all ipkg/opkg status data files from the target directory
89 before building the root filesystem.
90
91 config IPK_FILES_CHECKSUMS
92 bool
93 prompt "Record files checksums in package metadata"
94 default n
95 help
96 This makes file checksums part of package metadata. It increases size
97 but provides you with pkg_check command to check for flash coruptions.
98
99 config INCLUDE_CONFIG
100 bool "Include build configuration in firmware" if DEVEL
101 default n
102 help
103 If enabled, buildinfo files will be stored in /etc/build.* of firmware.
104
105 config COLLECT_KERNEL_DEBUG
106 bool
107 prompt "Collect kernel debug information"
108 select KERNEL_DEBUG_INFO
109 default BUILDBOT
110 help
111 This collects debugging symbols from the kernel and all compiled modules.
112 Useful for release builds, so that kernel issues can be debugged offline
113 later.
114
115 menu "Kernel build options"
116
117 source "config/Config-kernel.in"
118
119 endmenu
120
121 comment "Package build options"
122
123 config DEBUG
124 bool
125 prompt "Compile packages with debugging info"
126 default n
127 help
128 Adds -g3 to the CFLAGS.
129
130 config IPV6
131 bool
132 prompt "Enable IPv6 support in packages"
133 default y
134 help
135 Enables IPv6 support in kernel (builtin) and packages.
136
137 comment "Stripping options"
138
139 choice
140 prompt "Binary stripping method"
141 default USE_STRIP if EXTERNAL_TOOLCHAIN
142 default USE_STRIP if USE_GLIBC
143 default USE_SSTRIP
144 help
145 Select the binary stripping method you wish to use.
146
147 config NO_STRIP
148 bool "none"
149 help
150 This will install unstripped binaries (useful for native
151 compiling/debugging).
152
153 config USE_STRIP
154 bool "strip"
155 help
156 This will install binaries stripped using strip from binutils.
157
158
159 config USE_SSTRIP
160 bool "sstrip"
161 depends on !USE_GLIBC
162 help
163 This will install binaries stripped using sstrip.
164 endchoice
165
166 config STRIP_ARGS
167 string
168 prompt "Strip arguments"
169 depends on USE_STRIP
170 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
171 default "--strip-all"
172 help
173 Specifies arguments passed to the strip command when stripping binaries.
174
175 config STRIP_KERNEL_EXPORTS
176 bool "Strip unnecessary exports from the kernel image"
177 help
178 Reduces kernel size by stripping unused kernel exports from the kernel
179 image. Note that this might make the kernel incompatible with any kernel
180 modules that were not selected at the time the kernel image was created.
181
182 config USE_MKLIBS
183 bool "Strip unnecessary functions from libraries"
184 help
185 Reduces libraries to only those functions that are necessary for using all
186 selected packages (including those selected as <M>). Note that this will
187 make the system libraries incompatible with most of the packages that are
188 not selected during the build process.
189
190 choice
191 prompt "Preferred standard C++ library"
192 default USE_LIBSTDCXX if USE_GLIBC
193 default USE_UCLIBCXX
194 help
195 Select the preferred standard C++ library for all packages that support this.
196
197 config USE_UCLIBCXX
198 bool "uClibc++"
199
200 config USE_LIBCXX
201 bool "libc++"
202 depends on !USE_UCLIBC
203
204 config USE_LIBSTDCXX
205 bool "libstdc++"
206 endchoice
207
208 comment "Hardening build options"
209
210 config PKG_CHECK_FORMAT_SECURITY
211 bool
212 prompt "Enable gcc format-security"
213 default y
214 help
215 Add -Wformat -Werror=format-security to the CFLAGS. You can disable
216 this per package by adding PKG_CHECK_FORMAT_SECURITY:=0 in the package
217 Makefile.
218
219 choice
220 prompt "User space ASLR PIE compilation"
221 default PKG_ASLR_PIE_NONE if ((SMALL_FLASH || LOW_MEMORY_FOOTPRINT) && !SDK)
222 default PKG_ASLR_PIE_REGULAR
223 help
224 Add -fPIC to CFLAGS and -specs=hardened-build-ld to LDFLAGS.
225 This enables package build as Position Independent Executables (PIE)
226 to protect against "return-to-text" attacks. This belongs to the
227 feature of Address Space Layout Randomisation (ASLR), which is
228 implemented by the kernel and the ELF loader by randomising the
229 location of memory allocations. This makes memory addresses harder
230 to predict when an attacker is attempting a memory-corruption exploit.
231 You can disable this per package by adding PKG_ASLR_PIE:=0 in the package
232 Makefile.
233 Be ware that ASLR increases the binary size.
234 config PKG_ASLR_PIE_NONE
235 bool "None"
236 help
237 PIE is deactivated for all applications
238 config PKG_ASLR_PIE_REGULAR
239 bool "Regular"
240 help
241 PIE is activated for some binaries, mostly network exposed applications
242 config PKG_ASLR_PIE_ALL
243 bool "All"
244 select BUSYBOX_DEFAULT_PIE
245 help
246 PIE is activated for all applications
247 endchoice
248
249 choice
250 prompt "User space Stack-Smashing Protection"
251 depends on USE_MUSL
252 default PKG_CC_STACKPROTECTOR_REGULAR
253 help
254 Enable GCC Stack Smashing Protection (SSP) for userspace applications
255 config PKG_CC_STACKPROTECTOR_NONE
256 bool "None"
257 config PKG_CC_STACKPROTECTOR_REGULAR
258 bool "Regular"
259 select GCC_LIBSSP if !USE_MUSL
260 depends on KERNEL_CC_STACKPROTECTOR_REGULAR
261 config PKG_CC_STACKPROTECTOR_STRONG
262 bool "Strong"
263 select GCC_LIBSSP if !USE_MUSL
264 depends on KERNEL_CC_STACKPROTECTOR_STRONG
265 endchoice
266
267 choice
268 prompt "Kernel space Stack-Smashing Protection"
269 default KERNEL_CC_STACKPROTECTOR_REGULAR
270 depends on USE_MUSL || !(x86_64 || i386)
271 help
272 Enable GCC Stack-Smashing Protection (SSP) for the kernel
273 config KERNEL_CC_STACKPROTECTOR_NONE
274 bool "None"
275 config KERNEL_CC_STACKPROTECTOR_REGULAR
276 bool "Regular"
277 config KERNEL_CC_STACKPROTECTOR_STRONG
278 bool "Strong"
279 endchoice
280
281 config KERNEL_STACKPROTECTOR
282 bool
283 default KERNEL_CC_STACKPROTECTOR_REGULAR || KERNEL_CC_STACKPROTECTOR_STRONG
284
285 config KERNEL_STACKPROTECTOR_STRONG
286 bool
287 default KERNEL_CC_STACKPROTECTOR_STRONG
288
289 choice
290 prompt "Enable buffer-overflows detection (FORTIFY_SOURCE)"
291 default PKG_FORTIFY_SOURCE_1
292 help
293 Enable the _FORTIFY_SOURCE macro which introduces additional
294 checks to detect buffer-overflows in the following standard library
295 functions: memcpy, mempcpy, memmove, memset, strcpy, stpcpy,
296 strncpy, strcat, strncat, sprintf, vsprintf, snprintf, vsnprintf,
297 gets. "Conservative" (_FORTIFY_SOURCE set to 1) only introduces
298 checks that shouldn't change the behavior of conforming programs,
299 while "aggressive" (_FORTIFY_SOURCES set to 2) some more checking is
300 added, but some conforming programs might fail.
301 config PKG_FORTIFY_SOURCE_NONE
302 bool "None"
303 config PKG_FORTIFY_SOURCE_1
304 bool "Conservative"
305 config PKG_FORTIFY_SOURCE_2
306 bool "Aggressive"
307 endchoice
308
309 choice
310 prompt "Enable RELRO protection"
311 default PKG_RELRO_FULL
312 help
313 Enable a link-time protection known as RELRO (Relocation Read Only)
314 which helps to protect from certain type of exploitation techniques
315 altering the content of some ELF sections. "Partial" RELRO makes the
316 .dynamic section not writeable after initialization, introducing
317 almost no performance penalty, while "full" RELRO also marks the GOT
318 as read-only at the cost of initializing all of it at startup.
319 config PKG_RELRO_NONE
320 bool "None"
321 config PKG_RELRO_PARTIAL
322 bool "Partial"
323 config PKG_RELRO_FULL
324 bool "Full"
325 endchoice
326
327 endmenu