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.
71 config COLLECT_KERNEL_DEBUG
73 prompt "Collect kernel debug information"
74 select KERNEL_DEBUG_INFO
77 This collects debugging symbols from the kernel and all compiled modules.
78 Useful for release builds, so that kernel issues can be debugged offline
81 comment "Kernel build options"
83 source "config/Config-kernel.in"
85 comment "Package build options"
89 prompt "Compile packages with debugging info"
92 Adds -g3 to the CFLAGS.
96 prompt "Enable IPv6 support in packages"
99 Enables IPv6 support in kernel (builtin) and packages.
101 comment "Stripping options"
104 prompt "Binary stripping method"
105 default USE_STRIP if EXTERNAL_TOOLCHAIN
106 default USE_STRIP if USE_GLIBC
109 Select the binary stripping method you wish to use.
114 This will install unstripped binaries (useful for native
115 compiling/debugging).
120 This will install binaries stripped using strip from binutils.
125 depends on !USE_GLIBC
127 This will install binaries stripped using sstrip.
132 prompt "Strip arguments"
134 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
135 default "--strip-all"
137 Specifies arguments passed to the strip command when stripping binaries.
139 config STRIP_KERNEL_EXPORTS
140 bool "Strip unnecessary exports from the kernel image"
142 Reduces kernel size by stripping unused kernel exports from the kernel
143 image. Note that this might make the kernel incompatible with any kernel
144 modules that were not selected at the time the kernel image was created.
147 bool "Strip unnecessary functions from libraries"
149 Reduces libraries to only those functions that are necessary for using all
150 selected packages (including those selected as <M>). Note that this will
151 make the system libraries incompatible with most of the packages that are
152 not selected during the build process.
155 prompt "Preferred standard C++ library"
156 default USE_LIBSTDCXX if USE_GLIBC
159 Select the preferred standard C++ library for all packages that support this.
168 comment "Hardening build options"
170 config PKG_CHECK_FORMAT_SECURITY
172 prompt "Enable gcc format-security"
175 Add -Wformat -Werror=format-security to the CFLAGS. You can disable
176 this per package by adding PKG_CHECK_FORMAT_SECURITY:=0 in the package
180 prompt "User space Stack-Smashing Protection"
182 default PKG_CC_STACKPROTECTOR_REGULAR
184 Enable GCC Stack Smashing Protection (SSP) for userspace applications
185 config PKG_CC_STACKPROTECTOR_NONE
187 config PKG_CC_STACKPROTECTOR_REGULAR
189 select SSP_SUPPORT if !USE_MUSL
190 depends on KERNEL_CC_STACKPROTECTOR_REGULAR
191 config PKG_CC_STACKPROTECTOR_STRONG
193 select SSP_SUPPORT if !USE_MUSL
194 depends on !GCC_VERSION_4_8
195 depends on KERNEL_CC_STACKPROTECTOR_STRONG
199 prompt "Kernel space Stack-Smashing Protection"
200 default KERNEL_CC_STACKPROTECTOR_REGULAR
201 depends on USE_MUSL || !(x86_64 || i386)
203 Enable GCC Stack-Smashing Protection (SSP) for the kernel
204 config KERNEL_CC_STACKPROTECTOR_NONE
206 config KERNEL_CC_STACKPROTECTOR_REGULAR
208 config KERNEL_CC_STACKPROTECTOR_STRONG
209 depends on !GCC_VERSION_4_8
214 prompt "Enable buffer-overflows detection (FORTIFY_SOURCE)"
215 default PKG_FORTIFY_SOURCE_1
217 Enable the _FORTIFY_SOURCE macro which introduces additional
218 checks to detect buffer-overflows in the following standard library
219 functions: memcpy, mempcpy, memmove, memset, strcpy, stpcpy,
220 strncpy, strcat, strncat, sprintf, vsprintf, snprintf, vsnprintf,
221 gets. "Conservative" (_FORTIFY_SOURCE set to 1) only introduces
222 checks that shouldn't change the behavior of conforming programs,
223 while "aggressive" (_FORTIFY_SOURCES set to 2) some more checking is
224 added, but some conforming programs might fail.
225 config PKG_FORTIFY_SOURCE_NONE
227 config PKG_FORTIFY_SOURCE_1
229 config PKG_FORTIFY_SOURCE_2
234 prompt "Enable RELRO protection"
235 default PKG_RELRO_FULL
237 Enable a link-time protection known as RELRO (Relocation Read Only)
238 which helps to protect from certain type of exploitation techniques
239 altering the content of some ELF sections. "Partial" RELRO makes the
240 .dynamic section not writeable after initialization, introducing
241 almost no performance penalty, while "full" RELRO also marks the GOT
242 as read-only at the cost of initializing all of it at startup.
243 config PKG_RELRO_NONE
245 config PKG_RELRO_PARTIAL
247 config PKG_RELRO_FULL