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