1 # Copyright (C) 2006-2013 OpenWrt.org
2 # Copyright (C) 2016 LEDE Project
4 # This is free software, licensed under the GNU General Public License v2.
5 # See /LICENSE for more information.
8 menu "Global build settings"
11 bool "Select all target specific packages by default"
16 bool "Select all kernel module packages by default"
19 bool "Select all userspace packages by default"
24 bool "Set build defaults for automatic builds (e.g. via buildbot)"
27 This option changes several defaults to be more suitable for
28 automatic builds. This includes the following changes:
29 - Deleting build directories after compiling (to save space)
30 - Enabling per-device rootfs support
33 config SIGNED_PACKAGES
34 bool "Cryptographically signed package lists"
37 comment "General build options"
39 config DISPLAY_SUPPORT
40 bool "Show packages that require graphics support (local or remote)"
45 bool "Compile with support for patented functionality"
47 When this option is disabled, software which provides patented functionality
48 will not be built. In case software provides optional support for patented
49 functionality, this optional support will get disabled for this package.
53 bool "Compile with full language support"
55 When this option is enabled, packages are built with the full versions of
56 iconv and GNU gettext instead of the default OpenWrt stubs. If uClibc is
57 used, it is also built with locale support.
59 config SHADOW_PASSWORDS
65 prompt "Remove ipkg/opkg status data files in final images"
68 This removes all ipkg/opkg status data files from the target directory
69 before building the root filesystem.
72 bool "Include build configuration in firmware" if DEVEL
75 If enabled, config.seed will be stored in /etc/build.config of firmware.
77 config COLLECT_KERNEL_DEBUG
79 prompt "Collect kernel debug information"
80 select KERNEL_DEBUG_INFO
83 This collects debugging symbols from the kernel and all compiled modules.
84 Useful for release builds, so that kernel issues can be debugged offline
87 menu "Kernel build options"
89 source "config/Config-kernel.in"
93 comment "Package build options"
97 prompt "Compile packages with debugging info"
100 Adds -g3 to the CFLAGS.
104 prompt "Enable IPv6 support in packages"
107 Enables IPv6 support in kernel (builtin) and packages.
109 comment "Stripping options"
112 prompt "Binary stripping method"
113 default USE_STRIP if EXTERNAL_TOOLCHAIN
114 default USE_STRIP if USE_GLIBC
117 Select the binary stripping method you wish to use.
122 This will install unstripped binaries (useful for native
123 compiling/debugging).
128 This will install binaries stripped using strip from binutils.
133 depends on !USE_GLIBC
135 This will install binaries stripped using sstrip.
140 prompt "Strip arguments"
142 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
143 default "--strip-all"
145 Specifies arguments passed to the strip command when stripping binaries.
147 config STRIP_KERNEL_EXPORTS
148 bool "Strip unnecessary exports from the kernel image"
150 Reduces kernel size by stripping unused kernel exports from the kernel
151 image. Note that this might make the kernel incompatible with any kernel
152 modules that were not selected at the time the kernel image was created.
155 bool "Strip unnecessary functions from libraries"
157 Reduces libraries to only those functions that are necessary for using all
158 selected packages (including those selected as <M>). Note that this will
159 make the system libraries incompatible with most of the packages that are
160 not selected during the build process.
163 prompt "Preferred standard C++ library"
164 default USE_LIBSTDCXX if USE_GLIBC
167 Select the preferred standard C++ library for all packages that support this.
176 comment "Hardening build options"
178 config PKG_CHECK_FORMAT_SECURITY
180 prompt "Enable gcc format-security"
183 Add -Wformat -Werror=format-security to the CFLAGS. You can disable
184 this per package by adding PKG_CHECK_FORMAT_SECURITY:=0 in the package
188 prompt "User space Stack-Smashing Protection"
190 default PKG_CC_STACKPROTECTOR_REGULAR
192 Enable GCC Stack Smashing Protection (SSP) for userspace applications
193 config PKG_CC_STACKPROTECTOR_NONE
195 config PKG_CC_STACKPROTECTOR_REGULAR
197 select SSP_SUPPORT if !USE_MUSL
198 depends on KERNEL_CC_STACKPROTECTOR_REGULAR
199 config PKG_CC_STACKPROTECTOR_STRONG
201 select SSP_SUPPORT if !USE_MUSL
202 depends on !GCC_VERSION_4_8
203 depends on KERNEL_CC_STACKPROTECTOR_STRONG
207 prompt "Kernel space Stack-Smashing Protection"
208 default KERNEL_CC_STACKPROTECTOR_REGULAR
209 depends on USE_MUSL || !(x86_64 || i386)
211 Enable GCC Stack-Smashing Protection (SSP) for the kernel
212 config KERNEL_CC_STACKPROTECTOR_NONE
214 config KERNEL_CC_STACKPROTECTOR_REGULAR
216 config KERNEL_CC_STACKPROTECTOR_STRONG
217 depends on !GCC_VERSION_4_8
222 prompt "Enable buffer-overflows detection (FORTIFY_SOURCE)"
223 default PKG_FORTIFY_SOURCE_1
225 Enable the _FORTIFY_SOURCE macro which introduces additional
226 checks to detect buffer-overflows in the following standard library
227 functions: memcpy, mempcpy, memmove, memset, strcpy, stpcpy,
228 strncpy, strcat, strncat, sprintf, vsprintf, snprintf, vsnprintf,
229 gets. "Conservative" (_FORTIFY_SOURCE set to 1) only introduces
230 checks that shouldn't change the behavior of conforming programs,
231 while "aggressive" (_FORTIFY_SOURCES set to 2) some more checking is
232 added, but some conforming programs might fail.
233 config PKG_FORTIFY_SOURCE_NONE
235 config PKG_FORTIFY_SOURCE_1
237 config PKG_FORTIFY_SOURCE_2
242 prompt "Enable RELRO protection"
243 default PKG_RELRO_FULL
245 Enable a link-time protection known as RELRO (Relocation Read Only)
246 which helps to protect from certain type of exploitation techniques
247 altering the content of some ELF sections. "Partial" RELRO makes the
248 .dynamic section not writeable after initialization, introducing
249 almost no performance penalty, while "full" RELRO also marks the GOT
250 as read-only at the cost of initializing all of it at startup.
251 config PKG_RELRO_NONE
253 config PKG_RELRO_PARTIAL
255 config PKG_RELRO_FULL