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 REPRODUCIBLE_DEBUG_INFO
 107                 bool "Make debug information reproducible"
 108                 default BUILDBOT
 109                 help
 110                   This strips the local build path out of debug information. This has the
 111                   advantage of making it reproducible, but the disadvantage of making local
 112                   debugging using ./scripts/remote-gdb harder, since the debug data will
 113                   no longer point to the full path on the build host.
 114
 115         config COLLECT_KERNEL_DEBUG
 116                 bool
 117                 prompt "Collect kernel debug information"
 118                 select KERNEL_DEBUG_INFO
 119                 default BUILDBOT
 120                 help
 121                   This collects debugging symbols from the kernel and all compiled modules.
 122                   Useful for release builds, so that kernel issues can be debugged offline
 123                   later.
 124
 125         menu "Kernel build options"
 126
 127         source "config/Config-kernel.in"
 128
 129         endmenu
 130
 131         comment "Package build options"
 132
 133         config DEBUG
 134                 bool
 135                 prompt "Compile packages with debugging info"
 136                 default n
 137                 help
 138                   Adds -g3 to the CFLAGS.
 139
 140         config IPV6
 141                 bool
 142                 prompt "Enable IPv6 support in packages"
 143                 default y
 144                 help
 145                   Enables IPv6 support in kernel (builtin) and packages.
 146
 147         comment "Stripping options"
 148
 149         choice
 150                 prompt "Binary stripping method"
 151                 default USE_STRIP   if EXTERNAL_TOOLCHAIN
 152                 default USE_STRIP   if USE_GLIBC
 153                 default USE_SSTRIP
 154                 help
 155                   Select the binary stripping method you wish to use.
 156
 157                 config NO_STRIP
 158                         bool "none"
 159                         help
 160                           This will install unstripped binaries (useful for native
 161                           compiling/debugging).
 162
 163                 config USE_STRIP
 164                         bool "strip"
 165                         help
 166                           This will install binaries stripped using strip from binutils.
 167
 168
 169                 config USE_SSTRIP
 170                         bool "sstrip"
 171                         depends on !USE_GLIBC
 172                         help
 173                           This will install binaries stripped using sstrip.
 174         endchoice
 175
 176         config STRIP_ARGS
 177                 string
 178                 prompt "Strip arguments"
 179                 depends on USE_STRIP
 180                 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
 181                 default "--strip-all"
 182                 help
 183                   Specifies arguments passed to the strip command when stripping binaries.
 184
 185         config STRIP_KERNEL_EXPORTS
 186                 bool "Strip unnecessary exports from the kernel image"
 187                 help
 188                   Reduces kernel size by stripping unused kernel exports from the kernel
 189                   image.  Note that this might make the kernel incompatible with any kernel
 190                   modules that were not selected at the time the kernel image was created.
 191
 192         config USE_MKLIBS
 193                 bool "Strip unnecessary functions from libraries"
 194                 help
 195                   Reduces libraries to only those functions that are necessary for using all
 196                   selected packages (including those selected as <M>).  Note that this will
 197                   make the system libraries incompatible with most of the packages that are
 198                   not selected during the build process.
 199
 200         choice
 201                 prompt "Preferred standard C++ library"
 202                 default USE_LIBSTDCXX if USE_GLIBC
 203                 default USE_UCLIBCXX
 204                 help
 205                   Select the preferred standard C++ library for all packages that support this.
 206
 207                 config USE_UCLIBCXX
 208                         bool "uClibc++"
 209
 210                 config USE_LIBCXX
 211                         bool "libc++"
 212                         depends on !USE_UCLIBC
 213
 214                 config USE_LIBSTDCXX
 215                         bool "libstdc++"
 216         endchoice
 217
 218         comment "Hardening build options"
 219
 220         config PKG_CHECK_FORMAT_SECURITY
 221                 bool
 222                 prompt "Enable gcc format-security"
 223                 default y
 224                 help
 225                   Add -Wformat -Werror=format-security to the CFLAGS.  You can disable
 226                   this per package by adding PKG_CHECK_FORMAT_SECURITY:=0 in the package
 227                   Makefile.
 228
 229         choice
 230                 prompt "User space ASLR PIE compilation"
 231                 default PKG_ASLR_PIE_NONE if ((SMALL_FLASH || LOW_MEMORY_FOOTPRINT) && !SDK)
 232                 default PKG_ASLR_PIE_REGULAR
 233                 help
 234                   Add -fPIC to CFLAGS and -specs=hardened-build-ld to LDFLAGS.
 235                   This enables package build as Position Independent Executables (PIE)
 236                   to protect against "return-to-text" attacks. This belongs to the
 237                   feature of Address Space Layout Randomisation (ASLR), which is
 238                   implemented by the kernel and the ELF loader by randomising the
 239                   location of memory allocations. This makes memory addresses harder
 240                   to predict when an attacker is attempting a memory-corruption exploit.
 241                   You can disable this per package by adding PKG_ASLR_PIE:=0 in the package
 242                   Makefile.
 243                   Be ware that ASLR increases the binary size.
 244                 config PKG_ASLR_PIE_NONE
 245                         bool "None"
 246                         help
 247                           PIE is deactivated for all applications
 248                 config PKG_ASLR_PIE_REGULAR
 249                         bool "Regular"
 250                         help
 251                           PIE is activated for some binaries, mostly network exposed applications
 252                 config PKG_ASLR_PIE_ALL
 253                         bool "All"
 254                         select BUSYBOX_DEFAULT_PIE
 255                         help
 256                           PIE is activated for all applications
 257         endchoice
 258
 259         choice
 260                 prompt "User space Stack-Smashing Protection"
 261                 default PKG_CC_STACKPROTECTOR_REGULAR
 262                 help
 263                   Enable GCC Stack Smashing Protection (SSP) for userspace applications
 264                 config PKG_CC_STACKPROTECTOR_NONE
 265                         bool "None"
 266                 config PKG_CC_STACKPROTECTOR_REGULAR
 267                         bool "Regular"
 268                 config PKG_CC_STACKPROTECTOR_STRONG
 269                         bool "Strong"
 270         endchoice
 271
 272         choice
 273                 prompt "Kernel space Stack-Smashing Protection"
 274                 default KERNEL_CC_STACKPROTECTOR_REGULAR
 275                 help
 276                   Enable GCC Stack-Smashing Protection (SSP) for the kernel
 277                 config KERNEL_CC_STACKPROTECTOR_NONE
 278                         bool "None"
 279                 config KERNEL_CC_STACKPROTECTOR_REGULAR
 280                         bool "Regular"
 281                 config KERNEL_CC_STACKPROTECTOR_STRONG
 282                         bool "Strong"
 283         endchoice
 284
 285         config  KERNEL_STACKPROTECTOR
 286                 bool
 287                 default KERNEL_CC_STACKPROTECTOR_REGULAR || KERNEL_CC_STACKPROTECTOR_STRONG
 288
 289         config  KERNEL_STACKPROTECTOR_STRONG
 290                 bool
 291                 default KERNEL_CC_STACKPROTECTOR_STRONG
 292
 293         choice
 294                 prompt "Enable buffer-overflows detection (FORTIFY_SOURCE)"
 295                 default PKG_FORTIFY_SOURCE_1
 296                 help
 297                   Enable the _FORTIFY_SOURCE macro which introduces additional
 298                   checks to detect buffer-overflows in the following standard library
 299                   functions: memcpy, mempcpy, memmove, memset, strcpy, stpcpy,
 300                   strncpy, strcat, strncat, sprintf, vsprintf, snprintf, vsnprintf,
 301                   gets.  "Conservative" (_FORTIFY_SOURCE set to 1) only introduces
 302                   checks that shouldn't change the behavior of conforming programs,
 303                   while "aggressive" (_FORTIFY_SOURCES set to 2) some more checking is
 304                   added, but some conforming programs might fail.
 305                 config PKG_FORTIFY_SOURCE_NONE
 306                         bool "None"
 307                 config PKG_FORTIFY_SOURCE_1
 308                         bool "Conservative"
 309                 config PKG_FORTIFY_SOURCE_2
 310                         bool "Aggressive"
 311         endchoice
 312
 313         choice
 314                 prompt "Enable RELRO protection"
 315                 default PKG_RELRO_FULL
 316                 help
 317                   Enable a link-time protection known as RELRO (Relocation Read Only)
 318                   which helps to protect from certain type of exploitation techniques
 319                   altering the content of some ELF sections. "Partial" RELRO makes the
 320                   .dynamic section not writeable after initialization, introducing
 321                   almost no performance penalty, while "full" RELRO also marks the GOT
 322                   as read-only at the cost of initializing all of it at startup.
 323                 config PKG_RELRO_NONE
 324                         bool "None"
 325                 config PKG_RELRO_PARTIAL
 326                         bool "Partial"
 327                 config PKG_RELRO_FULL
 328                         bool "Full"
 329         endchoice
 330
 331 endmenu