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         help
   9           Set this option to build with latest bleeding edge features
  10           which may or may not work as expected.
  11           If you would like to help the development of OpenWrt, you are
  12           encouraged to set this option and provide feedback (both
  13           positive and negative). But do so only if you know how to
  14           recover your device in case of flashing potentially non-working
  15           firmware.
  16
  17           If you plan to use this build in production, say NO!
  18
  19 menu "Global build settings"
  20
  21         config JSON_OVERVIEW_IMAGE_INFO
  22                 bool "Create JSON info file overview per target"
  23                 default y
  24                 help
  25                   Create a JSON info file called profiles.json in the target
  26                   directory containing machine readable list of built profiles
  27                   and resulting images.
  28
  29         config ALL_NONSHARED
  30                 bool "Select all target specific packages by default"
  31                 select ALL_KMODS
  32                 default BUILDBOT
  33
  34         config ALL_KMODS
  35                 bool "Select all kernel module packages by default"
  36
  37         config ALL
  38                 bool "Select all userspace packages by default"
  39                 select ALL_KMODS
  40                 select ALL_NONSHARED
  41
  42         config BUILDBOT
  43                 bool "Set build defaults for automatic builds (e.g. via buildbot)"
  44                 help
  45                   This option changes several defaults to be more suitable for
  46                   automatic builds. This includes the following changes:
  47                   - Deleting build directories after compiling (to save space)
  48                   - Enabling per-device rootfs support
  49                   ...
  50
  51         config SIGNED_PACKAGES
  52                 bool "Cryptographically signed package lists"
  53                 default y
  54
  55         config SIGNATURE_CHECK
  56                 bool "Enable signature checking in opkg"
  57                 default SIGNED_PACKAGES
  58
  59         config DOWNLOAD_CHECK_CERTIFICATE
  60                 bool "Enable TLS certificate verification during package download"
  61                 default y
  62
  63         comment "General build options"
  64
  65         config TESTING_KERNEL
  66                 bool "Use the testing kernel version"
  67                 depends on HAS_TESTING_KERNEL
  68                 default EXPERIMENTAL
  69                 help
  70                   If the target supports a newer kernel version than the default,
  71                   you can use this config option to enable it
  72
  73
  74         config DISPLAY_SUPPORT
  75                 bool "Show packages that require graphics support (local or remote)"
  76
  77         config BUILD_PATENTED
  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                 bool "Compile with full language support"
  86                 help
  87                   When this option is enabled, packages are built with the full versions of
  88                   iconv and GNU gettext instead of the default OpenWrt stubs. If uClibc is
  89                   used, it is also built with locale support.
  90
  91         config SHADOW_PASSWORDS
  92                 bool
  93                 default y
  94
  95         config CLEAN_IPKG
  96                 bool
  97                 prompt "Remove ipkg/opkg status data files in final images"
  98                 help
  99                   This removes all ipkg/opkg status data files from the target directory
 100                   before building the root filesystem.
 101
 102         config IPK_FILES_CHECKSUMS
 103                 bool
 104                 prompt "Record files checksums in package metadata"
 105                 help
 106                   This makes file checksums part of package metadata. It increases size
 107                   but provides you with pkg_check command to check for flash corruptions.
 108
 109         config INCLUDE_CONFIG
 110                 bool "Include build configuration in firmware" if DEVEL
 111                 help
 112                   If enabled, buildinfo files will be stored in /etc/build.* of firmware.
 113
 114         config REPRODUCIBLE_DEBUG_INFO
 115                 bool "Make debug information reproducible"
 116                 default BUILDBOT
 117                 help
 118                   This strips the local build path out of debug information. This has the
 119                   advantage of making it reproducible, but the disadvantage of making local
 120                   debugging using ./scripts/remote-gdb harder, since the debug data will
 121                   no longer point to the full path on the build host.
 122
 123         config COLLECT_KERNEL_DEBUG
 124                 bool
 125                 prompt "Collect kernel debug information"
 126                 select KERNEL_DEBUG_INFO
 127                 default BUILDBOT
 128                 help
 129                   This collects debugging symbols from the kernel and all compiled modules.
 130                   Useful for release builds, so that kernel issues can be debugged offline
 131                   later.
 132
 133         menu "Kernel build options"
 134
 135         source "config/Config-kernel.in"
 136
 137         endmenu
 138
 139         comment "Package build options"
 140
 141         config DEBUG
 142                 bool
 143                 prompt "Compile packages with debugging info"
 144                 help
 145                   Adds -g3 to the CFLAGS.
 146
 147         config USE_GC_SECTIONS
 148                 bool
 149                 prompt "Dead code and data elimination for all packages (EXPERIMENTAL)"
 150                 help
 151                   Places functions and data items into its own sections to use the linker's
 152                   garbage collection capabilites.
 153                   Packages can choose to opt-out via setting PKG_BUILD_FLAGS:=no-gc-sections
 154
 155         config USE_LTO
 156                 bool
 157                 prompt "Use the link-time optimizer for all packages (EXPERIMENTAL)"
 158                 help
 159                   Adds LTO flags to the CFLAGS and LDFLAGS.
 160                   Packages can choose to opt-out via setting PKG_BUILD_FLAGS:=no-lto
 161
 162         config IPV6
 163                 def_bool y
 164
 165         comment "Stripping options"
 166
 167         choice
 168                 prompt "Binary stripping method"
 169                 default USE_STRIP   if USE_GLIBC
 170                 default USE_SSTRIP
 171                 help
 172                   Select the binary stripping method you wish to use.
 173
 174                 config NO_STRIP
 175                         bool "none"
 176                         help
 177                           This will install unstripped binaries (useful for native
 178                           compiling/debugging).
 179
 180                 config USE_STRIP
 181                         bool "strip"
 182                         help
 183                           This will install binaries stripped using strip from binutils.
 184
 185                 config USE_SSTRIP
 186                         bool "sstrip"
 187                         depends on !USE_GLIBC
 188                         help
 189                           This will install binaries stripped using sstrip.
 190         endchoice
 191
 192         config STRIP_ARGS
 193                 string
 194                 prompt "Strip arguments"
 195                 depends on USE_STRIP
 196                 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
 197                 default "--strip-all"
 198                 help
 199                   Specifies arguments passed to the strip command when stripping binaries.
 200
 201         config SSTRIP_DISCARD_TRAILING_ZEROES
 202                 bool "Strip trailing zero bytes"
 203                 depends on USE_SSTRIP
 204                 default y
 205                 help
 206                   Use sstrip's -z option to discard trailing zero bytes
 207
 208         config STRIP_KERNEL_EXPORTS
 209                 bool "Strip unnecessary exports from the kernel image"
 210                 help
 211                   Reduces kernel size by stripping unused kernel exports from the kernel
 212                   image.  Note that this might make the kernel incompatible with any kernel
 213                   modules that were not selected at the time the kernel image was created.
 214
 215         config USE_MKLIBS
 216                 bool "Strip unnecessary functions from libraries"
 217                 help
 218                   Reduces libraries to only those functions that are necessary for using all
 219                   selected packages (including those selected as <M>).  Note that this will
 220                   make the system libraries incompatible with most of the packages that are
 221                   not selected during the build process.
 222
 223         comment "Hardening build options"
 224
 225         config PKG_CHECK_FORMAT_SECURITY
 226                 bool
 227                 prompt "Enable gcc format-security"
 228                 default y
 229                 help
 230                   Add -Wformat -Werror=format-security to the CFLAGS.  You can disable
 231                   this per package by adding PKG_CHECK_FORMAT_SECURITY:=0 in the package
 232                   Makefile.
 233
 234         choice
 235                 prompt "User space ASLR PIE compilation"
 236                 default PKG_ASLR_PIE_NONE if ((SMALL_FLASH || LOW_MEMORY_FOOTPRINT) && !SDK)
 237                 default PKG_ASLR_PIE_REGULAR
 238                 help
 239                   Add -fPIC to CFLAGS and -specs=hardened-build-ld to LDFLAGS.
 240                   This enables package build as Position Independent Executables (PIE)
 241                   to protect against "return-to-text" attacks. This belongs to the
 242                   feature of Address Space Layout Randomisation (ASLR), which is
 243                   implemented by the kernel and the ELF loader by randomising the
 244                   location of memory allocations. This makes memory addresses harder
 245                   to predict when an attacker is attempting a memory-corruption exploit.
 246                   You can disable this per package by adding PKG_ASLR_PIE:=0 in the package
 247                   Makefile.
 248                   Be ware that ASLR increases the binary size.
 249                 config PKG_ASLR_PIE_NONE
 250                         bool "None"
 251                         help
 252                           PIE is deactivated for all applications
 253                 config PKG_ASLR_PIE_REGULAR
 254                         bool "Regular"
 255                         help
 256                           PIE is activated for some binaries, mostly network exposed applications
 257                 config PKG_ASLR_PIE_ALL
 258                         bool "All"
 259                         select BUSYBOX_DEFAULT_PIE
 260                         help
 261                           PIE is activated for all applications
 262         endchoice
 263
 264         choice
 265                 prompt "User space Stack-Smashing Protection"
 266                 default PKG_CC_STACKPROTECTOR_REGULAR
 267                 help
 268                   Enable GCC Stack Smashing Protection (SSP) for userspace applications
 269                 config PKG_CC_STACKPROTECTOR_NONE
 270                         bool "None"
 271                 config PKG_CC_STACKPROTECTOR_REGULAR
 272                         bool "Regular"
 273                 config PKG_CC_STACKPROTECTOR_STRONG
 274                         bool "Strong"
 275         endchoice
 276
 277         choice
 278                 prompt "Kernel space Stack-Smashing Protection"
 279                 default KERNEL_CC_STACKPROTECTOR_REGULAR
 280                 help
 281                   Enable GCC Stack-Smashing Protection (SSP) for the kernel
 282                 config KERNEL_CC_STACKPROTECTOR_NONE
 283                         bool "None"
 284                 config KERNEL_CC_STACKPROTECTOR_REGULAR
 285                         bool "Regular"
 286                 config KERNEL_CC_STACKPROTECTOR_STRONG
 287                         bool "Strong"
 288         endchoice
 289
 290         config KERNEL_STACKPROTECTOR
 291                 bool
 292                 default KERNEL_CC_STACKPROTECTOR_REGULAR || KERNEL_CC_STACKPROTECTOR_STRONG
 293
 294         config KERNEL_STACKPROTECTOR_STRONG
 295                 bool
 296                 default KERNEL_CC_STACKPROTECTOR_STRONG
 297
 298         choice
 299                 prompt "Enable buffer-overflows detection (FORTIFY_SOURCE)"
 300                 default PKG_FORTIFY_SOURCE_1
 301                 help
 302                   Enable the _FORTIFY_SOURCE macro which introduces additional
 303                   checks to detect buffer-overflows in the following standard library
 304                   functions: memcpy, mempcpy, memmove, memset, strcpy, stpcpy,
 305                   strncpy, strcat, strncat, sprintf, vsprintf, snprintf, vsnprintf,
 306                   gets.  "Conservative" (_FORTIFY_SOURCE set to 1) only introduces
 307                   checks that shouldn't change the behavior of conforming programs,
 308                   while "aggressive" (_FORTIFY_SOURCES set to 2) some more checking is
 309                   added, but some conforming programs might fail.
 310                 config PKG_FORTIFY_SOURCE_NONE
 311                         bool "None"
 312                 config PKG_FORTIFY_SOURCE_1
 313                         bool "Conservative"
 314                 config PKG_FORTIFY_SOURCE_2
 315                         bool "Aggressive"
 316         endchoice
 317
 318         choice
 319                 prompt "Enable RELRO protection"
 320                 default PKG_RELRO_FULL
 321                 help
 322                   Enable a link-time protection known as RELRO (Relocation Read Only)
 323                   which helps to protect from certain type of exploitation techniques
 324                   altering the content of some ELF sections. "Partial" RELRO makes the
 325                   .dynamic section not writeable after initialization, introducing
 326                   almost no performance penalty, while "full" RELRO also marks the GOT
 327                   as read-only at the cost of initializing all of it at startup.
 328                 config PKG_RELRO_NONE
 329                         bool "None"
 330                 config PKG_RELRO_PARTIAL
 331                         bool "Partial"
 332                 config PKG_RELRO_FULL
 333                         bool "Full"
 334         endchoice
 335
 336         config TARGET_ROOTFS_SECURITY_LABELS
 337                 bool
 338                 select KERNEL_SQUASHFS_XATTR
 339                 select KERNEL_EXT4_FS_SECURITY
 340                 select KERNEL_F2FS_FS_SECURITY
 341                 select KERNEL_UBIFS_FS_SECURITY
 342                 select KERNEL_JFFS2_FS_SECURITY
 343
 344         config SELINUX
 345                 bool "Enable SELinux"
 346                 select KERNEL_SECURITY_SELINUX
 347                 select TARGET_ROOTFS_SECURITY_LABELS
 348                 select PACKAGE_procd-selinux
 349                 select PACKAGE_busybox-selinux
 350                 help
 351                   This option enables SELinux kernel features, applies security labels
 352                   in squashfs rootfs and selects the selinux-variants of busybox and procd.
 353
 354                   Selecting this option results in about 0.5MiB of additional flash space
 355                   usage accounting for increased kernel and rootfs size.
 356
 357         choice
 358                 prompt "default SELinux type"
 359                 depends on TARGET_ROOTFS_SECURITY_LABELS
 360                 default SELINUXTYPE_dssp
 361                 help
 362                   Select SELinux policy to be installed and used for applying rootfs labels.
 363
 364                 config SELINUXTYPE_targeted
 365                         bool "targeted"
 366                         select PACKAGE_refpolicy
 367                         help
 368                           SELinux Reference Policy (refpolicy)
 369
 370                 config SELINUXTYPE_dssp
 371                         bool "dssp"
 372                         select PACKAGE_selinux-policy
 373                         help
 374                           Defensec SELinux Security Policy -- OpenWrt edition
 375
 376         endchoice
 377
 378         config SECCOMP
 379                 bool "Enable SECCOMP"
 380                 select KERNEL_SECCOMP
 381                 select PACKAGE_procd-seccomp
 382                 depends on (aarch64 || arm || armeb || mips || mipsel || mips64 || mips64el || i386 || powerpc || x86_64)
 383                 depends on !TARGET_uml
 384                 default y
 385                 help
 386                   This option enables seccomp kernel features to safely
 387                   execute untrusted bytecode and selects the seccomp-variants
 388                   of procd
 389
 390 endmenu