1 # SPDX-License-Identifier: GPL-2.0-only
3 # Copyright (C) 2006-2013 OpenWrt.org
4 # Copyright (C) 2016 LEDE Project
7 bool "Enable experimental features by default"
10 Set this option to build with latest bleeding edge features
11 which may or may not work as expected.
12 If you would like to help the development of OpenWrt, you are
13 encouraged to set this option and provide feedback (both
14 positive and negative). But do so only if you know how to
15 recover your device in case of flashing potentially non-working
18 If you plan to use this build in production, say NO!
20 menu "Global build settings"
22 config JSON_OVERVIEW_IMAGE_INFO
23 bool "Create JSON info file overview per target"
26 Create a JSON info file called profiles.json in the target
27 directory containing machine readable list of built profiles
31 bool "Select all target specific packages by default"
36 bool "Select all kernel module packages by default"
39 bool "Select all userspace packages by default"
44 bool "Set build defaults for automatic builds (e.g. via buildbot)"
47 This option changes several defaults to be more suitable for
48 automatic builds. This includes the following changes:
49 - Deleting build directories after compiling (to save space)
50 - Enabling per-device rootfs support
53 config SIGNED_PACKAGES
54 bool "Cryptographically signed package lists"
57 config SIGNATURE_CHECK
58 bool "Enable signature checking in opkg"
59 default SIGNED_PACKAGES
61 comment "General build options"
64 bool "Use the testing kernel version"
65 depends on HAS_TESTING_KERNEL
68 If the target supports a newer kernel version than the default,
69 you can use this config option to enable it
72 config DISPLAY_SUPPORT
73 bool "Show packages that require graphics support (local or remote)"
78 bool "Compile with support for patented functionality"
80 When this option is disabled, software which provides patented functionality
81 will not be built. In case software provides optional support for patented
82 functionality, this optional support will get disabled for this package.
86 bool "Compile with full language support"
88 When this option is enabled, packages are built with the full versions of
89 iconv and GNU gettext instead of the default OpenWrt stubs. If uClibc is
90 used, it is also built with locale support.
92 config SHADOW_PASSWORDS
98 prompt "Remove ipkg/opkg status data files in final images"
101 This removes all ipkg/opkg status data files from the target directory
102 before building the root filesystem.
104 config IPK_FILES_CHECKSUMS
106 prompt "Record files checksums in package metadata"
109 This makes file checksums part of package metadata. It increases size
110 but provides you with pkg_check command to check for flash corruptions.
112 config INCLUDE_CONFIG
113 bool "Include build configuration in firmware" if DEVEL
116 If enabled, buildinfo files will be stored in /etc/build.* of firmware.
118 config REPRODUCIBLE_DEBUG_INFO
119 bool "Make debug information reproducible"
122 This strips the local build path out of debug information. This has the
123 advantage of making it reproducible, but the disadvantage of making local
124 debugging using ./scripts/remote-gdb harder, since the debug data will
125 no longer point to the full path on the build host.
127 config COLLECT_KERNEL_DEBUG
129 prompt "Collect kernel debug information"
130 select KERNEL_DEBUG_INFO
133 This collects debugging symbols from the kernel and all compiled modules.
134 Useful for release builds, so that kernel issues can be debugged offline
137 menu "Kernel build options"
139 source "config/Config-kernel.in"
143 comment "Package build options"
147 prompt "Compile packages with debugging info"
150 Adds -g3 to the CFLAGS.
154 prompt "Enable IPv6 support in packages"
157 Enables IPv6 support in kernel (builtin) and packages.
159 comment "Stripping options"
162 prompt "Binary stripping method"
163 default USE_STRIP if EXTERNAL_TOOLCHAIN
164 default USE_STRIP if USE_GLIBC
167 Select the binary stripping method you wish to use.
172 This will install unstripped binaries (useful for native
173 compiling/debugging).
178 This will install binaries stripped using strip from binutils.
183 depends on !USE_GLIBC
185 This will install binaries stripped using sstrip.
190 prompt "Strip arguments"
192 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
193 default "--strip-all"
195 Specifies arguments passed to the strip command when stripping binaries.
199 prompt "Sstrip arguments"
200 depends on USE_SSTRIP
203 Specifies arguments passed to the sstrip command when stripping binaries.
205 config STRIP_KERNEL_EXPORTS
206 bool "Strip unnecessary exports from the kernel image"
208 Reduces kernel size by stripping unused kernel exports from the kernel
209 image. Note that this might make the kernel incompatible with any kernel
210 modules that were not selected at the time the kernel image was created.
213 bool "Strip unnecessary functions from libraries"
215 Reduces libraries to only those functions that are necessary for using all
216 selected packages (including those selected as <M>). Note that this will
217 make the system libraries incompatible with most of the packages that are
218 not selected during the build process.
220 comment "Hardening build options"
222 config PKG_CHECK_FORMAT_SECURITY
224 prompt "Enable gcc format-security"
227 Add -Wformat -Werror=format-security to the CFLAGS. You can disable
228 this per package by adding PKG_CHECK_FORMAT_SECURITY:=0 in the package
232 prompt "User space ASLR PIE compilation"
233 default PKG_ASLR_PIE_NONE if ((SMALL_FLASH || LOW_MEMORY_FOOTPRINT) && !SDK)
234 default PKG_ASLR_PIE_REGULAR
236 Add -fPIC to CFLAGS and -specs=hardened-build-ld to LDFLAGS.
237 This enables package build as Position Independent Executables (PIE)
238 to protect against "return-to-text" attacks. This belongs to the
239 feature of Address Space Layout Randomisation (ASLR), which is
240 implemented by the kernel and the ELF loader by randomising the
241 location of memory allocations. This makes memory addresses harder
242 to predict when an attacker is attempting a memory-corruption exploit.
243 You can disable this per package by adding PKG_ASLR_PIE:=0 in the package
245 Be ware that ASLR increases the binary size.
246 config PKG_ASLR_PIE_NONE
249 PIE is deactivated for all applications
250 config PKG_ASLR_PIE_REGULAR
253 PIE is activated for some binaries, mostly network exposed applications
254 config PKG_ASLR_PIE_ALL
256 select BUSYBOX_DEFAULT_PIE
258 PIE is activated for all applications
262 prompt "User space Stack-Smashing Protection"
263 default PKG_CC_STACKPROTECTOR_REGULAR
265 Enable GCC Stack Smashing Protection (SSP) for userspace applications
266 config PKG_CC_STACKPROTECTOR_NONE
268 config PKG_CC_STACKPROTECTOR_REGULAR
270 config PKG_CC_STACKPROTECTOR_STRONG
275 prompt "Kernel space Stack-Smashing Protection"
276 default KERNEL_CC_STACKPROTECTOR_REGULAR
278 Enable GCC Stack-Smashing Protection (SSP) for the kernel
279 config KERNEL_CC_STACKPROTECTOR_NONE
281 config KERNEL_CC_STACKPROTECTOR_REGULAR
283 config KERNEL_CC_STACKPROTECTOR_STRONG
287 config KERNEL_STACKPROTECTOR
289 default KERNEL_CC_STACKPROTECTOR_REGULAR || KERNEL_CC_STACKPROTECTOR_STRONG
291 config KERNEL_STACKPROTECTOR_STRONG
293 default KERNEL_CC_STACKPROTECTOR_STRONG
296 prompt "Enable buffer-overflows detection (FORTIFY_SOURCE)"
297 default PKG_FORTIFY_SOURCE_1
299 Enable the _FORTIFY_SOURCE macro which introduces additional
300 checks to detect buffer-overflows in the following standard library
301 functions: memcpy, mempcpy, memmove, memset, strcpy, stpcpy,
302 strncpy, strcat, strncat, sprintf, vsprintf, snprintf, vsnprintf,
303 gets. "Conservative" (_FORTIFY_SOURCE set to 1) only introduces
304 checks that shouldn't change the behavior of conforming programs,
305 while "aggressive" (_FORTIFY_SOURCES set to 2) some more checking is
306 added, but some conforming programs might fail.
307 config PKG_FORTIFY_SOURCE_NONE
309 config PKG_FORTIFY_SOURCE_1
311 config PKG_FORTIFY_SOURCE_2
316 prompt "Enable RELRO protection"
317 default PKG_RELRO_FULL
319 Enable a link-time protection known as RELRO (Relocation Read Only)
320 which helps to protect from certain type of exploitation techniques
321 altering the content of some ELF sections. "Partial" RELRO makes the
322 .dynamic section not writeable after initialization, introducing
323 almost no performance penalty, while "full" RELRO also marks the GOT
324 as read-only at the cost of initializing all of it at startup.
325 config PKG_RELRO_NONE
327 config PKG_RELRO_PARTIAL
329 config PKG_RELRO_FULL
333 config TARGET_ROOTFS_SECURITY_LABELS
335 select KERNEL_SQUASHFS_XATTR
336 select KERNEL_EXT4_FS_SECURITY
337 select KERNEL_F2FS_FS_SECURITY
338 select KERNEL_UBIFS_FS_SECURITY
339 select KERNEL_JFFS2_FS_SECURITY
342 bool "Enable SELinux"
343 select KERNEL_SECURITY_SELINUX
344 select TARGET_ROOTFS_SECURITY_LABELS
345 select PACKAGE_procd-selinux
346 select PACKAGE_busybox-selinux
348 This option enables SELinux kernel features, applies security labels
349 in squashfs rootfs and selects the selinux-variants of busybox and procd.
351 Selecting this option results in about 0.5MiB of additional flash space
352 usage accounting for increased kernel and rootfs size.
355 prompt "default SELinux type"
356 depends on TARGET_ROOTFS_SECURITY_LABELS
357 default SELINUXTYPE_dssp
359 Select SELinux policy to be installed and used for applying rootfs labels.
361 config SELINUXTYPE_targeted
363 select PACKAGE_refpolicy
365 SELinux Reference Policy (refpolicy)
367 config SELINUXTYPE_dssp
369 select PACKAGE_selinux-policy
371 Defensec SELinux Security Policy -- OpenWrt edition
376 bool "Enable SECCOMP"
377 select KERNEL_SECCOMP
378 select PACKAGE_procd-seccomp
379 depends on (aarch64 || arm || armeb || mips || mipsel || mips64 || mips64el || i386 || powerpc || x86_64)
380 depends on !TARGET_uml
383 This option enables seccomp kernel features to safely
384 execute untrusted bytecode and selects the seccomp-variants