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"
21 comment "General build options"
23 config DISPLAY_SUPPORT
24 bool "Show packages that require graphics support (local or remote)"
29 bool "Compile with support for patented functionality"
31 When this option is disabled, software which provides patented functionality
32 will not be built. In case software provides optional support for patented
33 functionality, this optional support will get disabled for this package.
37 bool "Compile with full language support"
39 When this option is enabled, packages are built with the full versions of
40 iconv and GNU gettext instead of the default OpenWrt stubs. If uClibc is
41 used, it is also built with locale support.
43 config SHADOW_PASSWORDS
45 prompt "Enable shadow password support"
48 Enable shadow password support.
52 prompt "Remove ipkg/opkg status data files in final images"
55 This removes all ipkg/opkg status data files from the target directory
56 before building the root filesystem.
58 config COLLECT_KERNEL_DEBUG
60 prompt "Collect kernel debug information"
61 select KERNEL_DEBUG_INFO
64 This collects debugging symbols from the kernel and all compiled modules.
65 Useful for release builds, so that kernel issues can be debugged offline
68 comment "Kernel build options"
70 source "config/Config-kernel.in"
72 comment "Package build options"
76 prompt "Compile packages with debugging info"
79 Adds -g3 to the CFLAGS.
83 prompt "Enable IPv6 support in packages"
86 Enables IPv6 support in kernel (builtin) and packages.
88 config PKG_BUILD_PARALLEL
90 prompt "Compile certain packages parallelized"
93 This adds a -jX option to certain packages that are known to behave well
94 for parallel build. By default, the package make processes use the main
95 jobserver, in which case this option only takes effect when you add -jX
98 If you are unsure, select N.
100 config PKG_BUILD_USE_JOBSERVER
102 prompt "Use top-level make jobserver for packages"
103 depends on PKG_BUILD_PARALLEL
106 This passes the main make process jobserver fds to package builds,
107 enabling full parallelization across different packages.
109 Note that disabling this may overcommit CPU resources depending on the
110 -j level of the main make process, the number of package submake jobs
111 selected below and the number of actual CPUs present.
112 Example: If the main make is passed a -j4 and the submake -j
113 is also set to 4, we may end up with 16 parallel make processes
116 config PKG_BUILD_JOBS
118 prompt "Number of package submake jobs (2-512)"
121 depends on PKG_BUILD_PARALLEL && !PKG_BUILD_USE_JOBSERVER
123 The number of jobs (-jX) to pass to packages submake.
125 config PKG_DEFAULT_PARALLEL
127 prompt "Parallelize the default package build rule (May break build)"
128 depends on PKG_BUILD_PARALLEL
132 Always set the default package build rules to parallel build.
134 WARNING: This may break build or kill your cat, as it builds packages
135 with multiple jobs that are probably not tested in a parallel build
138 Only say Y if you don't mind fixing broken packages. Before reporting
139 build bugs, set this to N and re-run the build.
141 comment "Stripping options"
144 prompt "Binary stripping method"
145 default USE_STRIP if EXTERNAL_TOOLCHAIN
146 default USE_STRIP if USE_GLIBC
149 Select the binary stripping method you wish to use.
154 This will install unstripped binaries (useful for native
155 compiling/debugging).
160 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"
222 default PKG_CC_STACKPROTECTOR_REGULAR
224 Enable GCC Stack Smashing Protection (SSP) for userspace applications
225 config PKG_CC_STACKPROTECTOR_NONE
227 config PKG_CC_STACKPROTECTOR_REGULAR
229 select SSP_SUPPORT if !USE_MUSL
230 depends on KERNEL_CC_STACKPROTECTOR_REGULAR
231 config PKG_CC_STACKPROTECTOR_STRONG
233 select SSP_SUPPORT if !USE_MUSL
234 depends on GCC_VERSION_5
235 depends on KERNEL_CC_STACKPROTECTOR_STRONG
239 prompt "Kernel space Stack-Smashing Protection"
240 default KERNEL_CC_STACKPROTECTOR_REGULAR
241 depends on USE_MUSL || !(x86_64 || i386)
243 Enable GCC Stack-Smashing Protection (SSP) for the kernel
244 config KERNEL_CC_STACKPROTECTOR_NONE
246 config KERNEL_CC_STACKPROTECTOR_REGULAR
248 config KERNEL_CC_STACKPROTECTOR_STRONG
249 depends on GCC_VERSION_5
254 prompt "Enable buffer-overflows detection (FORTIFY_SOURCE)"
255 default PKG_FORTIFY_SOURCE_1
257 Enable the _FORTIFY_SOURCE macro which introduces additional
258 checks to detect buffer-overflows in the following standard library
259 functions: memcpy, mempcpy, memmove, memset, strcpy, stpcpy,
260 strncpy, strcat, strncat, sprintf, vsprintf, snprintf, vsnprintf,
261 gets. "Conservative" (_FORTIFY_SOURCE set to 1) only introduces
262 checks that shouldn't change the behavior of conforming programs,
263 while "aggressive" (_FORTIFY_SOURCES set to 2) some more checking is
264 added, but some conforming programs might fail.
265 config PKG_FORTIFY_SOURCE_NONE
267 config PKG_FORTIFY_SOURCE_1
269 config PKG_FORTIFY_SOURCE_2
274 prompt "Enable RELRO protection"
275 default PKG_RELRO_FULL
277 Enable a link-time protection known as RELRO (Relocation Read Only)
278 which helps to protect from certain type of exploitation techniques
279 altering the content of some ELF sections. "Partial" RELRO makes the
280 .dynamic section not writeable after initialization, introducing
281 almost no performance penalty, while "full" RELRO also marks the GOT
282 as read-only at the cost of initializing all of it at startup.
283 config PKG_RELRO_NONE
285 config PKG_RELRO_PARTIAL
287 config PKG_RELRO_FULL