1 # Copyright (C) 2006-2013 OpenWrt.org
3 # This is free software, licensed under the GNU General Public License v2.
4 # See /LICENSE for more information.
7 menu "Global build settings"
10 bool "Select all kernel module packages by default"
14 bool "Select all userspace packages by default"
17 config SIGNED_PACKAGES
18 bool "Cryptographically signed package lists"
20 comment "General build options"
22 config DISPLAY_SUPPORT
23 bool "Show packages that require graphics support (local or remote)"
28 bool "Compile with support for patented functionality"
30 When this option is disabled, software which provides patented functionality
31 will not be built. In case software provides optional support for patented
32 functionality, this optional support will get disabled for this package.
36 bool "Compile with full language support"
38 When this option is enabled, packages are built with the full versions of
39 iconv and GNU gettext instead of the default OpenWrt stubs. If uClibc is
40 used, it is also built with locale support.
42 config SHADOW_PASSWORDS
44 prompt "Enable shadow password support"
47 Enable shadow password support.
51 prompt "Remove ipkg/opkg status data files in final images"
54 This removes all ipkg/opkg status data files from the target directory
55 before building the root filesystem.
57 config COLLECT_KERNEL_DEBUG
59 prompt "Collect kernel debug information"
60 select KERNEL_DEBUG_INFO
63 This collects debugging symbols from the kernel and all compiled modules.
64 Useful for release builds, so that kernel issues can be debugged offline
67 comment "Kernel build options"
69 source "config/Config-kernel.in"
71 comment "Package build options"
75 prompt "Compile packages with debugging info"
78 Adds -g3 to the CFLAGS.
82 prompt "Enable IPv6 support in packages"
85 Enable IPv6 support in packages (passes --enable-ipv6 to configure scripts).
87 config PKG_BUILD_PARALLEL
89 prompt "Compile certain packages parallelized"
92 This adds a -jX option to certain packages that are known to behave well
93 for parallel build. By default, the package make processes use the main
94 jobserver, in which case this option only takes effect when you add -jX
97 If you are unsure, select N.
99 config PKG_BUILD_USE_JOBSERVER
101 prompt "Use top-level make jobserver for packages"
102 depends on PKG_BUILD_PARALLEL
105 This passes the main make process jobserver fds to package builds,
106 enabling full parallelization across different packages.
108 Note that disabling this may overcommit CPU resources depending on the
109 -j level of the main make process, the number of package submake jobs
110 selected below and the number of actual CPUs present.
111 Example: If the main make is passed a -j4 and the submake -j
112 is also set to 4, we may end up with 16 parallel make processes
115 config PKG_BUILD_JOBS
117 prompt "Number of package submake jobs (2-512)"
120 depends on PKG_BUILD_PARALLEL && !PKG_BUILD_USE_JOBSERVER
122 The number of jobs (-jX) to pass to packages submake.
124 config PKG_DEFAULT_PARALLEL
126 prompt "Parallelize the default package build rule (May break build)"
127 depends on PKG_BUILD_PARALLEL
131 Always set the default package build rules to parallel build.
133 WARNING: This may break build or kill your cat, as it builds packages
134 with multiple jobs that are probably not tested in a parallel build
137 Only say Y if you don't mind fixing broken packages. Before reporting
138 build bugs, set this to N and re-run the build.
140 comment "Stripping options"
143 prompt "Binary stripping method"
144 default USE_STRIP if EXTERNAL_TOOLCHAIN
145 default USE_STRIP if USE_GLIBC || USE_MUSL
148 Select the binary stripping method you wish to use.
153 This will install unstripped binaries (useful for native
154 compiling/debugging).
159 This will install binaries stripped using strip from binutils.
165 depends on !USE_GLIBC
167 This will install binaries stripped using sstrip.
172 prompt "Strip arguments"
174 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
175 default "--strip-all"
177 Specifies arguments passed to the strip command when stripping binaries.
179 config STRIP_KERNEL_EXPORTS
180 bool "Strip unnecessary exports from the kernel image"
182 Reduces kernel size by stripping unused kernel exports from the kernel
183 image. Note that this might make the kernel incompatible with any kernel
184 modules that were not selected at the time the kernel image was created.
187 bool "Strip unnecessary functions from libraries"
189 Reduces libraries to only those functions that are necessary for using all
190 selected packages (including those selected as <M>). Note that this will
191 make the system libraries incompatible with most of the packages that are
192 not selected during the build process.
195 prompt "Preferred standard C++ library"
196 default USE_LIBSTDCXX if USE_GLIBC
199 Select the preferred standard C++ library for all packages that support this.
208 comment "Hardening build options"
210 config PKG_CHECK_FORMAT_SECURITY
212 prompt "Enable gcc format-security"
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
220 prompt "User space Stack-Smashing Protection"
221 default PKG_CC_STACKPROTECTOR_NONE
223 Enable GCC Stack Smashing Protection (SSP) for userspace applications
224 config PKG_CC_STACKPROTECTOR_NONE
226 config PKG_CC_STACKPROTECTOR_REGULAR
229 depends on KERNEL_CC_STACKPROTECTOR_REGULAR
230 config PKG_CC_STACKPROTECTOR_STRONG
233 depends on GCC_VERSION_4_9_LINARO
234 depends on KERNEL_CC_STACKPROTECTOR_STRONG
238 prompt "Kernel space Stack-Smashing Protection"
239 default KERNEL_CC_STACKPROTECTOR_NONE
241 Enable GCC Stack-Smashing Protection (SSP) for the kernel
242 config KERNEL_CC_STACKPROTECTOR_NONE
244 config KERNEL_CC_STACKPROTECTOR_REGULAR
246 config KERNEL_CC_STACKPROTECTOR_STRONG
247 depends on GCC_VERSION_4_9_LINARO
252 prompt "Enable buffer-overflows detection (FORTIFY_SOURCE)"
254 Enable the _FORTIFY_SOURCE macro which introduces additional
255 checks to detect buffer-overflows in the following standard library
256 functions: memcpy, mempcpy, memmove, memset, strcpy, stpcpy,
257 strncpy, strcat, strncat, sprintf, vsprintf, snprintf, vsnprintf,
258 gets. "Conservative" (_FORTIFY_SOURCE set to 1) only introduces
259 checks that shouldn't change the behavior of conforming programs,
260 while "aggressive" (_FORTIFY_SOURCES set to 2) some more checking is
261 added, but some conforming programs might fail.
262 config PKG_FORTIFY_SOURCE_NONE
264 config PKG_FORTIFY_SOURCE_1
266 config PKG_FORTIFY_SOURCE_2
271 prompt "Enable RELRO protection"
273 Enable a link-time protection known as RELRO (Relocation Read Only)
274 which helps to protect from certain type of exploitation techniques
275 altering the content of some ELF sections. "Partial" RELRO makes the
276 .dynamic section not writeable after initialization, introducing
277 almost no performance penalty, while "full" RELRO also marks the GOT
278 as read-only at the cost of initializing all of it at startup.
279 config PKG_RELRO_NONE
281 config PKG_RELRO_PARTIAL
283 config PKG_RELRO_FULL