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 JSON_ADD_IMAGE_INFO
  11                 bool "Create JSON info files per build image"
  12                 default BUILDBOT
  13                 help
  14                   The JSON info files contain information about the device and
  15                   build images, stored next to the firmware images.
  16
  17         config ALL_NONSHARED
  18                 bool "Select all target specific packages by default"
  19                 select ALL_KMODS
  20                 default BUILDBOT
  21
  22         config ALL_KMODS
  23                 bool "Select all kernel module packages by default"
  24
  25         config ALL
  26                 bool "Select all userspace packages by default"
  27                 select ALL_KMODS
  28                 select ALL_NONSHARED
  29
  30         config BUILDBOT
  31                 bool "Set build defaults for automatic builds (e.g. via buildbot)"
  32                 default n
  33                 help
  34                   This option changes several defaults to be more suitable for
  35                   automatic builds. This includes the following changes:
  36                   - Deleting build directories after compiling (to save space)
  37                   - Enabling per-device rootfs support
  38                   ...
  39
  40         config SIGNED_PACKAGES
  41                 bool "Cryptographically signed package lists"
  42                 default y
  43
  44         config SIGNATURE_CHECK
  45                 bool "Enable signature checking in opkg"
  46                 default SIGNED_PACKAGES
  47
  48         comment "General build options"
  49
  50         config TESTING_KERNEL
  51                 bool "Use the testing kernel version"
  52                 depends on HAS_TESTING_KERNEL
  53                 default n
  54                 help
  55                   If the target supports a newer kernel version than the default,
  56                   you can use this config option to enable it
  57
  58
  59         config DISPLAY_SUPPORT
  60                 bool "Show packages that require graphics support (local or remote)"
  61                 default n
  62
  63         config BUILD_PATENTED
  64                 default n
  65                 bool "Compile with support for patented functionality"
  66                 help
  67                   When this option is disabled, software which provides patented functionality
  68                   will not be built.  In case software provides optional support for patented
  69                   functionality, this optional support will get disabled for this package.
  70
  71         config BUILD_NLS
  72                 default n
  73                 bool "Compile with full language support"
  74                 help
  75                   When this option is enabled, packages are built with the full versions of
  76                   iconv and GNU gettext instead of the default OpenWrt stubs. If uClibc is
  77                   used, it is also built with locale support.
  78
  79         config SHADOW_PASSWORDS
  80                 bool
  81                 default y
  82
  83         config CLEAN_IPKG
  84                 bool
  85                 prompt "Remove ipkg/opkg status data files in final images"
  86                 default n
  87                 help
  88                   This removes all ipkg/opkg status data files from the target directory
  89                   before building the root filesystem.
  90
  91         config IPK_FILES_CHECKSUMS
  92                 bool
  93                 prompt "Record files checksums in package metadata"
  94                 default n
  95                 help
  96                   This makes file checksums part of package metadata. It increases size
  97                   but provides you with pkg_check command to check for flash coruptions.
  98
  99         config INCLUDE_CONFIG
 100                 bool "Include build configuration in firmware" if DEVEL
 101                 default n
 102                 help
 103                   If enabled, config.buildinfo will be stored in /etc/build.config of firmware.
 104
 105         config COLLECT_KERNEL_DEBUG
 106                 bool
 107                 prompt "Collect kernel debug information"
 108                 select KERNEL_DEBUG_INFO
 109                 default BUILDBOT
 110                 help
 111                   This collects debugging symbols from the kernel and all compiled modules.
 112                   Useful for release builds, so that kernel issues can be debugged offline
 113                   later.
 114
 115         menu "Kernel build options"
 116
 117         source "config/Config-kernel.in"
 118
 119         endmenu
 120
 121         comment "Package build options"
 122
 123         config DEBUG
 124                 bool
 125                 prompt "Compile packages with debugging info"
 126                 default n
 127                 help
 128                   Adds -g3 to the CFLAGS.
 129
 130         config IPV6
 131                 bool
 132                 prompt "Enable IPv6 support in packages"
 133                 default y
 134                 help
 135                   Enables IPv6 support in kernel (builtin) and packages.
 136
 137         comment "Stripping options"
 138
 139         choice
 140                 prompt "Binary stripping method"
 141                 default USE_STRIP   if EXTERNAL_TOOLCHAIN
 142                 default USE_STRIP   if USE_GLIBC
 143                 default USE_SSTRIP
 144                 help
 145                   Select the binary stripping method you wish to use.
 146
 147                 config NO_STRIP
 148                         bool "none"
 149                         help
 150                           This will install unstripped binaries (useful for native
 151                           compiling/debugging).
 152
 153                 config USE_STRIP
 154                         bool "strip"
 155                         help
 156                           This will install binaries stripped using strip from binutils.
 157
 158
 159                 config USE_SSTRIP
 160                         bool "sstrip"
 161                         depends on !USE_GLIBC
 162                         help
 163                           This will install binaries stripped using sstrip.
 164         endchoice
 165
 166         config STRIP_ARGS
 167                 string
 168                 prompt "Strip arguments"
 169                 depends on USE_STRIP
 170                 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
 171                 default "--strip-all"
 172                 help
 173                   Specifies arguments passed to the strip command when stripping binaries.
 174
 175         config STRIP_KERNEL_EXPORTS
 176                 bool "Strip unnecessary exports from the kernel image"
 177                 help
 178                   Reduces kernel size by stripping unused kernel exports from the kernel
 179                   image.  Note that this might make the kernel incompatible with any kernel
 180                   modules that were not selected at the time the kernel image was created.
 181
 182         config USE_MKLIBS
 183                 bool "Strip unnecessary functions from libraries"
 184                 help
 185                   Reduces libraries to only those functions that are necessary for using all
 186                   selected packages (including those selected as <M>).  Note that this will
 187                   make the system libraries incompatible with most of the packages that are
 188                   not selected during the build process.
 189
 190         choice
 191                 prompt "Preferred standard C++ library"
 192                 default USE_LIBSTDCXX if USE_GLIBC
 193                 default USE_UCLIBCXX
 194                 help
 195                   Select the preferred standard C++ library for all packages that support this.
 196
 197                 config USE_UCLIBCXX
 198                         bool "uClibc++"
 199
 200                 config USE_LIBCXX
 201                         bool "libc++"
 202                         depends on !USE_UCLIBC
 203
 204                 config USE_LIBSTDCXX
 205                         bool "libstdc++"
 206         endchoice
 207
 208         comment "Hardening build options"
 209
 210         config PKG_CHECK_FORMAT_SECURITY
 211                 bool
 212                 prompt "Enable gcc format-security"
 213                 default y
 214                 help
 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
 217                   Makefile.
 218
 219         choice
 220                 prompt "User space ASLR PIE compilation"
 221                 default PKG_ASLR_PIE_NONE if ((SMALL_FLASH || LOW_MEMORY_FOOTPRINT) && !SDK)
 222                 default PKG_ASLR_PIE_REGULAR
 223                 help
 224                   Add -fPIC to CFLAGS and -specs=hardened-build-ld to LDFLAGS.
 225                   This enables package build as Position Independent Executables (PIE)
 226                   to protect against "return-to-text" attacks. This belongs to the
 227                   feature of Address Space Layout Randomisation (ASLR), which is
 228                   implemented by the kernel and the ELF loader by randomising the
 229                   location of memory allocations. This makes memory addresses harder
 230                   to predict when an attacker is attempting a memory-corruption exploit.
 231                   You can disable this per package by adding PKG_ASLR_PIE:=0 in the package
 232                   Makefile.
 233                   Be ware that ASLR increases the binary size.
 234                 config PKG_ASLR_PIE_NONE
 235                         bool "None"
 236                         help
 237                           PIE is deactivated for all applications
 238                 config PKG_ASLR_PIE_REGULAR
 239                         bool "Regular"
 240                         help
 241                           PIE is activated for some binaries, mostly network exposed applications
 242                 config PKG_ASLR_PIE_ALL
 243                         bool "All"
 244                         select BUSYBOX_DEFAULT_PIE
 245                         help
 246                           PIE is activated for all applications
 247         endchoice
 248
 249         choice
 250                 prompt "User space Stack-Smashing Protection"
 251                 depends on USE_MUSL
 252                 default PKG_CC_STACKPROTECTOR_REGULAR
 253                 help
 254                   Enable GCC Stack Smashing Protection (SSP) for userspace applications
 255                 config PKG_CC_STACKPROTECTOR_NONE
 256                         bool "None"
 257                 config PKG_CC_STACKPROTECTOR_REGULAR
 258                         bool "Regular"
 259                         select GCC_LIBSSP if !USE_MUSL
 260                         depends on KERNEL_CC_STACKPROTECTOR_REGULAR
 261                 config PKG_CC_STACKPROTECTOR_STRONG
 262                         bool "Strong"
 263                         select GCC_LIBSSP if !USE_MUSL
 264                         depends on KERNEL_CC_STACKPROTECTOR_STRONG
 265         endchoice
 266
 267         choice
 268                 prompt "Kernel space Stack-Smashing Protection"
 269                 default KERNEL_CC_STACKPROTECTOR_REGULAR
 270                 depends on USE_MUSL || !(x86_64 || i386)
 271                 help
 272                   Enable GCC Stack-Smashing Protection (SSP) for the kernel
 273                 config KERNEL_CC_STACKPROTECTOR_NONE
 274                         bool "None"
 275                 config KERNEL_CC_STACKPROTECTOR_REGULAR
 276                         bool "Regular"
 277                 config KERNEL_CC_STACKPROTECTOR_STRONG
 278                         bool "Strong"
 279         endchoice
 280
 281         config  KERNEL_STACKPROTECTOR
 282                 bool
 283                 default KERNEL_CC_STACKPROTECTOR_REGULAR || KERNEL_CC_STACKPROTECTOR_STRONG
 284
 285         config  KERNEL_STACKPROTECTOR_STRONG
 286                 bool
 287                 default KERNEL_CC_STACKPROTECTOR_STRONG
 288
 289         choice
 290                 prompt "Enable buffer-overflows detection (FORTIFY_SOURCE)"
 291                 default PKG_FORTIFY_SOURCE_1
 292                 help
 293                   Enable the _FORTIFY_SOURCE macro which introduces additional
 294                   checks to detect buffer-overflows in the following standard library
 295                   functions: memcpy, mempcpy, memmove, memset, strcpy, stpcpy,
 296                   strncpy, strcat, strncat, sprintf, vsprintf, snprintf, vsnprintf,
 297                   gets.  "Conservative" (_FORTIFY_SOURCE set to 1) only introduces
 298                   checks that shouldn't change the behavior of conforming programs,
 299                   while "aggressive" (_FORTIFY_SOURCES set to 2) some more checking is
 300                   added, but some conforming programs might fail.
 301                 config PKG_FORTIFY_SOURCE_NONE
 302                         bool "None"
 303                 config PKG_FORTIFY_SOURCE_1
 304                         bool "Conservative"
 305                 config PKG_FORTIFY_SOURCE_2
 306                         bool "Aggressive"
 307         endchoice
 308
 309         choice
 310                 prompt "Enable RELRO protection"
 311                 default PKG_RELRO_FULL
 312                 help
 313                   Enable a link-time protection known as RELRO (Relocation Read Only)
 314                   which helps to protect from certain type of exploitation techniques
 315                   altering the content of some ELF sections. "Partial" RELRO makes the
 316                   .dynamic section not writeable after initialization, introducing
 317                   almost no performance penalty, while "full" RELRO also marks the GOT
 318                   as read-only at the cost of initializing all of it at startup.
 319                 config PKG_RELRO_NONE
 320                         bool "None"
 321                 config PKG_RELRO_PARTIAL
 322                         bool "Partial"
 323                 config PKG_RELRO_FULL
 324                         bool "Full"
 325         endchoice
 326
 327 endmenu