config/Config-build.in

   1 # Copyright (C) 2006-2013 OpenWrt.org
   2 # Copyright (C) 2016 LEDE Project
   3 #
   4 # This is free software, licensed under the GNU General Public License v2.
   5 # See /LICENSE for more information.
   6 #
   7
   8 menu "Global build settings"
   9
  10         config ALL_NONSHARED
  11                 bool "Select all target specific packages by default"
  12                 select ALL_KMODS
  13                 default BUILDBOT
  14
  15         config ALL_KMODS
  16                 bool "Select all kernel module packages by default"
  17
  18         config ALL
  19                 bool "Select all userspace packages by default"
  20                 select ALL_KMODS
  21                 select ALL_NONSHARED
  22
  23         config BUILDBOT
  24                 bool "Set build defaults for automatic builds (e.g. via buildbot)"
  25                 default n
  26                 help
  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
  31                   ...
  32
  33         config SIGNED_PACKAGES
  34                 bool "Cryptographically signed package lists"
  35                 default y
  36
  37         comment "General build options"
  38
  39         config DISPLAY_SUPPORT
  40                 bool "Show packages that require graphics support (local or remote)"
  41                 default n
  42
  43         config BUILD_PATENTED
  44                 default n
  45                 bool "Compile with support for patented functionality"
  46                 help
  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.
  50
  51         config BUILD_NLS
  52                 default n
  53                 bool "Compile with full language support"
  54                 help
  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.
  58
  59         config SHADOW_PASSWORDS
  60                 bool
  61                 default y
  62
  63         config CLEAN_IPKG
  64                 bool
  65                 prompt "Remove ipkg/opkg status data files in final images"
  66                 default n
  67                 help
  68                   This removes all ipkg/opkg status data files from the target directory
  69                   before building the root filesystem.
  70
  71         config INCLUDE_CONFIG
  72                 bool "Include build configuration in firmware" if DEVEL
  73                 default n
  74                 help
  75                   If enabled, config.seed will be stored in /etc/build.config of firmware.
  76
  77         config COLLECT_KERNEL_DEBUG
  78                 bool
  79                 prompt "Collect kernel debug information"
  80                 select KERNEL_DEBUG_INFO
  81                 default BUILDBOT
  82                 help
  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
  85                   later.
  86
  87         menu "Kernel build options"
  88
  89         source "config/Config-kernel.in"
  90
  91         endmenu
  92
  93         comment "Package build options"
  94
  95         config DEBUG
  96                 bool
  97                 prompt "Compile packages with debugging info"
  98                 default n
  99                 help
 100                   Adds -g3 to the CFLAGS.
 101
 102         config IPV6
 103                 bool
 104                 prompt "Enable IPv6 support in packages"
 105                 default y
 106                 help
 107                   Enables IPv6 support in kernel (builtin) and packages.
 108
 109         comment "Stripping options"
 110
 111         choice
 112                 prompt "Binary stripping method"
 113                 default USE_STRIP   if EXTERNAL_TOOLCHAIN
 114                 default USE_STRIP   if USE_GLIBC
 115                 default USE_SSTRIP
 116                 help
 117                   Select the binary stripping method you wish to use.
 118
 119                 config NO_STRIP
 120                         bool "none"
 121                         help
 122                           This will install unstripped binaries (useful for native
 123                           compiling/debugging).
 124
 125                 config USE_STRIP
 126                         bool "strip"
 127                         help
 128                           This will install binaries stripped using strip from binutils.
 129
 130
 131                 config USE_SSTRIP
 132                         bool "sstrip"
 133                         depends on !USE_GLIBC
 134                         help
 135                           This will install binaries stripped using sstrip.
 136         endchoice
 137
 138         config STRIP_ARGS
 139                 string
 140                 prompt "Strip arguments"
 141                 depends on USE_STRIP
 142                 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
 143                 default "--strip-all"
 144                 help
 145                   Specifies arguments passed to the strip command when stripping binaries.
 146
 147         config STRIP_KERNEL_EXPORTS
 148                 bool "Strip unnecessary exports from the kernel image"
 149                 help
 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.
 153
 154         config USE_MKLIBS
 155                 bool "Strip unnecessary functions from libraries"
 156                 help
 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.
 161
 162         choice
 163                 prompt "Preferred standard C++ library"
 164                 default USE_LIBSTDCXX if USE_GLIBC
 165                 default USE_UCLIBCXX
 166                 help
 167                   Select the preferred standard C++ library for all packages that support this.
 168
 169                 config USE_UCLIBCXX
 170                         bool "uClibc++"
 171
 172                 config USE_LIBSTDCXX
 173                         bool "libstdc++"
 174         endchoice
 175
 176         comment "Hardening build options"
 177
 178         config PKG_CHECK_FORMAT_SECURITY
 179                 bool
 180                 prompt "Enable gcc format-security"
 181                 default y
 182                 help
 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
 185                   Makefile.
 186
 187         config PKG_ASLR_PIE
 188                 bool
 189                 prompt "User space ASLR PIE compilation"
 190                 select BUSYBOX_DEFAULT_PIE
 191                 default n
 192                 help
 193                   Add -fPIC to CFLAGS and -specs=hardened-build-ld to LDFLAGS.
 194                   This enables package build as Position Independent Executables (PIE)
 195                   to protect against "return-to-text" attacks. This belongs to the
 196                   feature of Address Space Layout Randomisation (ASLR), which is
 197                   implemented by the kernel and the ELF loader by randomising the
 198                   location of memory allocations. This makes memory addresses harder
 199                   to predict when an attacker is attempting a memory-corruption exploit.
 200                   You can disable this per package by adding PKG_ASLR_PIE:=0 in the package
 201                   Makefile.
 202
 203         choice
 204                 prompt "User space Stack-Smashing Protection"
 205                 depends on USE_MUSL
 206                 default PKG_CC_STACKPROTECTOR_REGULAR
 207                 help
 208                   Enable GCC Stack Smashing Protection (SSP) for userspace applications
 209                 config PKG_CC_STACKPROTECTOR_NONE
 210                         bool "None"
 211                 config PKG_CC_STACKPROTECTOR_REGULAR
 212                         bool "Regular"
 213                         select GCC_LIBSSP if !USE_MUSL
 214                         depends on KERNEL_CC_STACKPROTECTOR_REGULAR
 215                 config PKG_CC_STACKPROTECTOR_STRONG
 216                         bool "Strong"
 217                         select GCC_LIBSSP if !USE_MUSL
 218                         depends on !GCC_VERSION_4_8
 219                         depends on KERNEL_CC_STACKPROTECTOR_STRONG
 220         endchoice
 221
 222         choice
 223                 prompt "Kernel space Stack-Smashing Protection"
 224                 default KERNEL_CC_STACKPROTECTOR_REGULAR
 225                 depends on USE_MUSL || !(x86_64 || i386)
 226                 help
 227                   Enable GCC Stack-Smashing Protection (SSP) for the kernel
 228                 config KERNEL_CC_STACKPROTECTOR_NONE
 229                         bool "None"
 230                 config KERNEL_CC_STACKPROTECTOR_REGULAR
 231                         bool "Regular"
 232                 config KERNEL_CC_STACKPROTECTOR_STRONG
 233                         depends on !GCC_VERSION_4_8
 234                         bool "Strong"
 235         endchoice
 236
 237         choice
 238                 prompt "Enable buffer-overflows detection (FORTIFY_SOURCE)"
 239                 default PKG_FORTIFY_SOURCE_1
 240                 help
 241                   Enable the _FORTIFY_SOURCE macro which introduces additional
 242                   checks to detect buffer-overflows in the following standard library
 243                   functions: memcpy, mempcpy, memmove, memset, strcpy, stpcpy,
 244                   strncpy, strcat, strncat, sprintf, vsprintf, snprintf, vsnprintf,
 245                   gets.  "Conservative" (_FORTIFY_SOURCE set to 1) only introduces
 246                   checks that shouldn't change the behavior of conforming programs,
 247                   while "aggressive" (_FORTIFY_SOURCES set to 2) some more checking is
 248                   added, but some conforming programs might fail.
 249                 config PKG_FORTIFY_SOURCE_NONE
 250                         bool "None"
 251                 config PKG_FORTIFY_SOURCE_1
 252                         bool "Conservative"
 253                 config PKG_FORTIFY_SOURCE_2
 254                         bool "Aggressive"
 255         endchoice
 256
 257         choice
 258                 prompt "Enable RELRO protection"
 259                 default PKG_RELRO_FULL
 260                 help
 261                   Enable a link-time protection known as RELRO (Relocation Read Only)
 262                   which helps to protect from certain type of exploitation techniques
 263                   altering the content of some ELF sections. "Partial" RELRO makes the
 264                   .dynamic section not writeable after initialization, introducing
 265                   almost no performance penalty, while "full" RELRO also marks the GOT
 266                   as read-only at the cost of initializing all of it at startup.
 267                 config PKG_RELRO_NONE
 268                         bool "None"
 269                 config PKG_RELRO_PARTIAL
 270                         bool "Partial"
 271                 config PKG_RELRO_FULL
 272                         bool "Full"
 273         endchoice
 274
 275 endmenu