config/Config-build.in

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 #
   3 # Copyright (C) 2006-2013 OpenWrt.org
   4 # Copyright (C) 2016 LEDE Project
   5
   6 config EXPERIMENTAL
   7         bool "Enable experimental features by default"
   8         default n
   9         help
  10           Set this option to build with latest bleeding edge features
  11           which may or may not work as expected.
  12           If you would like to help the development of OpenWrt, you are
  13           encouraged to set this option and provide feedback (both
  14           positive and negative). But do so only if you know how to
  15           recover your device in case of flashing potentially non-working
  16           firmware.
  17
  18           If you plan to use this build in production, say NO!
  19
  20 menu "Global build settings"
  21
  22         config JSON_OVERVIEW_IMAGE_INFO
  23                 bool "Create JSON info file overview per target"
  24                 default y
  25                 help
  26                   Create a JSON info file called profiles.json in the target
  27                   directory containing machine readable list of built profiles
  28                   and resulting images.
  29
  30         config ALL_NONSHARED
  31                 bool "Select all target specific packages by default"
  32                 select ALL_KMODS
  33                 default BUILDBOT
  34
  35         config ALL_KMODS
  36                 bool "Select all kernel module packages by default"
  37
  38         config ALL
  39                 bool "Select all userspace packages by default"
  40                 select ALL_KMODS
  41                 select ALL_NONSHARED
  42
  43         config BUILDBOT
  44                 bool "Set build defaults for automatic builds (e.g. via buildbot)"
  45                 default n
  46                 help
  47                   This option changes several defaults to be more suitable for
  48                   automatic builds. This includes the following changes:
  49                   - Deleting build directories after compiling (to save space)
  50                   - Enabling per-device rootfs support
  51                   ...
  52
  53         config SIGNED_PACKAGES
  54                 bool "Cryptographically signed package lists"
  55                 default y
  56
  57         config SIGNATURE_CHECK
  58                 bool "Enable signature checking in opkg"
  59                 default SIGNED_PACKAGES
  60
  61         comment "General build options"
  62
  63         config TESTING_KERNEL
  64                 bool "Use the testing kernel version"
  65                 depends on HAS_TESTING_KERNEL
  66                 default EXPERIMENTAL
  67                 help
  68                   If the target supports a newer kernel version than the default,
  69                   you can use this config option to enable it
  70
  71
  72         config DISPLAY_SUPPORT
  73                 bool "Show packages that require graphics support (local or remote)"
  74                 default n
  75
  76         config BUILD_PATENTED
  77                 default n
  78                 bool "Compile with support for patented functionality"
  79                 help
  80                   When this option is disabled, software which provides patented functionality
  81                   will not be built.  In case software provides optional support for patented
  82                   functionality, this optional support will get disabled for this package.
  83
  84         config BUILD_NLS
  85                 default n
  86                 bool "Compile with full language support"
  87                 help
  88                   When this option is enabled, packages are built with the full versions of
  89                   iconv and GNU gettext instead of the default OpenWrt stubs. If uClibc is
  90                   used, it is also built with locale support.
  91
  92         config SHADOW_PASSWORDS
  93                 bool
  94                 default y
  95
  96         config CLEAN_IPKG
  97                 bool
  98                 prompt "Remove ipkg/opkg status data files in final images"
  99                 default n
 100                 help
 101                   This removes all ipkg/opkg status data files from the target directory
 102                   before building the root filesystem.
 103
 104         config IPK_FILES_CHECKSUMS
 105                 bool
 106                 prompt "Record files checksums in package metadata"
 107                 default n
 108                 help
 109                   This makes file checksums part of package metadata. It increases size
 110                   but provides you with pkg_check command to check for flash corruptions.
 111
 112         config INCLUDE_CONFIG
 113                 bool "Include build configuration in firmware" if DEVEL
 114                 default n
 115                 help
 116                   If enabled, buildinfo files will be stored in /etc/build.* of firmware.
 117
 118         config REPRODUCIBLE_DEBUG_INFO
 119                 bool "Make debug information reproducible"
 120                 default BUILDBOT
 121                 help
 122                   This strips the local build path out of debug information. This has the
 123                   advantage of making it reproducible, but the disadvantage of making local
 124                   debugging using ./scripts/remote-gdb harder, since the debug data will
 125                   no longer point to the full path on the build host.
 126
 127         config COLLECT_KERNEL_DEBUG
 128                 bool
 129                 prompt "Collect kernel debug information"
 130                 select KERNEL_DEBUG_INFO
 131                 default BUILDBOT
 132                 help
 133                   This collects debugging symbols from the kernel and all compiled modules.
 134                   Useful for release builds, so that kernel issues can be debugged offline
 135                   later.
 136
 137         menu "Kernel build options"
 138
 139         source "config/Config-kernel.in"
 140
 141         endmenu
 142
 143         comment "Package build options"
 144
 145         config DEBUG
 146                 bool
 147                 prompt "Compile packages with debugging info"
 148                 default n
 149                 help
 150                   Adds -g3 to the CFLAGS.
 151
 152         config IPV6
 153                 bool
 154                 prompt "Enable IPv6 support in packages"
 155                 default y
 156                 help
 157                   Enables IPv6 support in kernel (builtin) and packages.
 158
 159         comment "Stripping options"
 160
 161         choice
 162                 prompt "Binary stripping method"
 163                 default USE_STRIP   if EXTERNAL_TOOLCHAIN
 164                 default USE_STRIP   if USE_GLIBC
 165                 default USE_SSTRIP
 166                 help
 167                   Select the binary stripping method you wish to use.
 168
 169                 config NO_STRIP
 170                         bool "none"
 171                         help
 172                           This will install unstripped binaries (useful for native
 173                           compiling/debugging).
 174
 175                 config USE_STRIP
 176                         bool "strip"
 177                         help
 178                           This will install binaries stripped using strip from binutils.
 179
 180
 181                 config USE_SSTRIP
 182                         bool "sstrip"
 183                         depends on !USE_GLIBC
 184                         help
 185                           This will install binaries stripped using sstrip.
 186         endchoice
 187
 188         config STRIP_ARGS
 189                 string
 190                 prompt "Strip arguments"
 191                 depends on USE_STRIP
 192                 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
 193                 default "--strip-all"
 194                 help
 195                   Specifies arguments passed to the strip command when stripping binaries.
 196
 197         config SSTRIP_ARGS
 198                 string
 199                 prompt "Sstrip arguments"
 200                 depends on USE_SSTRIP
 201                 default "-z"
 202                 help
 203                   Specifies arguments passed to the sstrip command when stripping binaries.
 204
 205         config STRIP_KERNEL_EXPORTS
 206                 bool "Strip unnecessary exports from the kernel image"
 207                 help
 208                   Reduces kernel size by stripping unused kernel exports from the kernel
 209                   image.  Note that this might make the kernel incompatible with any kernel
 210                   modules that were not selected at the time the kernel image was created.
 211
 212         config USE_MKLIBS
 213                 bool "Strip unnecessary functions from libraries"
 214                 help
 215                   Reduces libraries to only those functions that are necessary for using all
 216                   selected packages (including those selected as <M>).  Note that this will
 217                   make the system libraries incompatible with most of the packages that are
 218                   not selected during the build process.
 219
 220         comment "Hardening build options"
 221
 222         config PKG_CHECK_FORMAT_SECURITY
 223                 bool
 224                 prompt "Enable gcc format-security"
 225                 default y
 226                 help
 227                   Add -Wformat -Werror=format-security to the CFLAGS.  You can disable
 228                   this per package by adding PKG_CHECK_FORMAT_SECURITY:=0 in the package
 229                   Makefile.
 230
 231         choice
 232                 prompt "User space ASLR PIE compilation"
 233                 default PKG_ASLR_PIE_NONE if ((SMALL_FLASH || LOW_MEMORY_FOOTPRINT) && !SDK)
 234                 default PKG_ASLR_PIE_REGULAR
 235                 help
 236                   Add -fPIC to CFLAGS and -specs=hardened-build-ld to LDFLAGS.
 237                   This enables package build as Position Independent Executables (PIE)
 238                   to protect against "return-to-text" attacks. This belongs to the
 239                   feature of Address Space Layout Randomisation (ASLR), which is
 240                   implemented by the kernel and the ELF loader by randomising the
 241                   location of memory allocations. This makes memory addresses harder
 242                   to predict when an attacker is attempting a memory-corruption exploit.
 243                   You can disable this per package by adding PKG_ASLR_PIE:=0 in the package
 244                   Makefile.
 245                   Be ware that ASLR increases the binary size.
 246                 config PKG_ASLR_PIE_NONE
 247                         bool "None"
 248                         help
 249                           PIE is deactivated for all applications
 250                 config PKG_ASLR_PIE_REGULAR
 251                         bool "Regular"
 252                         help
 253                           PIE is activated for some binaries, mostly network exposed applications
 254                 config PKG_ASLR_PIE_ALL
 255                         bool "All"
 256                         select BUSYBOX_DEFAULT_PIE
 257                         help
 258                           PIE is activated for all applications
 259         endchoice
 260
 261         choice
 262                 prompt "User space Stack-Smashing Protection"
 263                 default PKG_CC_STACKPROTECTOR_REGULAR
 264                 help
 265                   Enable GCC Stack Smashing Protection (SSP) for userspace applications
 266                 config PKG_CC_STACKPROTECTOR_NONE
 267                         bool "None"
 268                 config PKG_CC_STACKPROTECTOR_REGULAR
 269                         bool "Regular"
 270                 config PKG_CC_STACKPROTECTOR_STRONG
 271                         bool "Strong"
 272         endchoice
 273
 274         choice
 275                 prompt "Kernel space Stack-Smashing Protection"
 276                 default KERNEL_CC_STACKPROTECTOR_REGULAR
 277                 help
 278                   Enable GCC Stack-Smashing Protection (SSP) for the kernel
 279                 config KERNEL_CC_STACKPROTECTOR_NONE
 280                         bool "None"
 281                 config KERNEL_CC_STACKPROTECTOR_REGULAR
 282                         bool "Regular"
 283                 config KERNEL_CC_STACKPROTECTOR_STRONG
 284                         bool "Strong"
 285         endchoice
 286
 287         config KERNEL_STACKPROTECTOR
 288                 bool
 289                 default KERNEL_CC_STACKPROTECTOR_REGULAR || KERNEL_CC_STACKPROTECTOR_STRONG
 290
 291         config KERNEL_STACKPROTECTOR_STRONG
 292                 bool
 293                 default KERNEL_CC_STACKPROTECTOR_STRONG
 294
 295         choice
 296                 prompt "Enable buffer-overflows detection (FORTIFY_SOURCE)"
 297                 default PKG_FORTIFY_SOURCE_1
 298                 help
 299                   Enable the _FORTIFY_SOURCE macro which introduces additional
 300                   checks to detect buffer-overflows in the following standard library
 301                   functions: memcpy, mempcpy, memmove, memset, strcpy, stpcpy,
 302                   strncpy, strcat, strncat, sprintf, vsprintf, snprintf, vsnprintf,
 303                   gets.  "Conservative" (_FORTIFY_SOURCE set to 1) only introduces
 304                   checks that shouldn't change the behavior of conforming programs,
 305                   while "aggressive" (_FORTIFY_SOURCES set to 2) some more checking is
 306                   added, but some conforming programs might fail.
 307                 config PKG_FORTIFY_SOURCE_NONE
 308                         bool "None"
 309                 config PKG_FORTIFY_SOURCE_1
 310                         bool "Conservative"
 311                 config PKG_FORTIFY_SOURCE_2
 312                         bool "Aggressive"
 313         endchoice
 314
 315         choice
 316                 prompt "Enable RELRO protection"
 317                 default PKG_RELRO_FULL
 318                 help
 319                   Enable a link-time protection known as RELRO (Relocation Read Only)
 320                   which helps to protect from certain type of exploitation techniques
 321                   altering the content of some ELF sections. "Partial" RELRO makes the
 322                   .dynamic section not writeable after initialization, introducing
 323                   almost no performance penalty, while "full" RELRO also marks the GOT
 324                   as read-only at the cost of initializing all of it at startup.
 325                 config PKG_RELRO_NONE
 326                         bool "None"
 327                 config PKG_RELRO_PARTIAL
 328                         bool "Partial"
 329                 config PKG_RELRO_FULL
 330                         bool "Full"
 331         endchoice
 332
 333         config TARGET_ROOTFS_SECURITY_LABELS
 334                 bool
 335                 select KERNEL_SQUASHFS_XATTR
 336                 select KERNEL_EXT4_FS_SECURITY
 337                 select KERNEL_F2FS_FS_SECURITY
 338                 select KERNEL_UBIFS_FS_SECURITY
 339                 select KERNEL_JFFS2_FS_SECURITY
 340
 341         config SELINUX
 342                 bool "Enable SELinux"
 343                 select KERNEL_SECURITY_SELINUX
 344                 select TARGET_ROOTFS_SECURITY_LABELS
 345                 select PACKAGE_procd-selinux
 346                 select PACKAGE_busybox-selinux
 347                 help
 348                   This option enables SELinux kernel features, applies security labels
 349                   in squashfs rootfs and selects the selinux-variants of busybox and procd.
 350
 351                   Selecting this option results in about 0.5MiB of additional flash space
 352                   usage accounting for increased kernel and rootfs size.
 353
 354         choice
 355                 prompt "default SELinux type"
 356                 depends on TARGET_ROOTFS_SECURITY_LABELS
 357                 default SELINUXTYPE_dssp
 358                 help
 359                   Select SELinux policy to be installed and used for applying rootfs labels.
 360
 361                 config SELINUXTYPE_targeted
 362                         bool "targeted"
 363                         select PACKAGE_refpolicy
 364                         help
 365                           SELinux Reference Policy (refpolicy)
 366
 367                 config SELINUXTYPE_dssp
 368                         bool "dssp"
 369                         select PACKAGE_selinux-policy
 370                         help
 371                           Defensec SELinux Security Policy -- OpenWrt edition
 372
 373         endchoice
 374
 375         config SECCOMP
 376                 bool "Enable SECCOMP"
 377                 select KERNEL_SECCOMP
 378                 select PACKAGE_procd-seccomp
 379                 depends on (aarch64 || arm || armeb || mips || mipsel || mips64 || mips64el || i386 || powerpc || x86_64)
 380                 depends on !TARGET_uml
 381                 default y
 382                 help
 383                   This option enables seccomp kernel features to safely
 384                   execute untrusted bytecode and selects the seccomp-variants
 385                   of procd
 386
 387 endmenu