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 JSON_CYCLONEDX_SBOM
  30                 bool "Create CycloneDX SBOM JSON"
  31                 default BUILDBOT
  32                 help
  33                   Create a JSON files *.bom.cdx.json in the build
  34                   directory containing Software Bill Of Materials in CycloneDX
  35                   format.
  36
  37         config ALL_NONSHARED
  38                 bool "Select all target specific packages by default"
  39                 select ALL_KMODS
  40                 default BUILDBOT
  41
  42         config ALL_KMODS
  43                 bool "Select all kernel module packages by default"
  44
  45         config ALL
  46                 bool "Select all userspace packages by default"
  47                 select ALL_KMODS
  48                 select ALL_NONSHARED
  49
  50         config BUILDBOT
  51                 bool "Set build defaults for automatic builds (e.g. via buildbot)"
  52                 help
  53                   This option changes several defaults to be more suitable for
  54                   automatic builds. This includes the following changes:
  55                   - Deleting build directories after compiling (to save space)
  56                   - Enabling per-device rootfs support
  57                   ...
  58
  59         config SIGNED_PACKAGES
  60                 bool "Cryptographically signed package lists"
  61                 default y
  62
  63         config SIGNATURE_CHECK
  64                 bool "Enable signature checking in opkg"
  65                 default SIGNED_PACKAGES
  66
  67         config DOWNLOAD_CHECK_CERTIFICATE
  68                 bool "Enable TLS certificate verification during package download"
  69                 default y
  70
  71         comment "General build options"
  72
  73         config TESTING_KERNEL
  74                 bool "Use the testing kernel version"
  75                 depends on HAS_TESTING_KERNEL
  76                 default EXPERIMENTAL
  77                 help
  78                   If the target supports a newer kernel version than the default,
  79                   you can use this config option to enable it
  80
  81
  82         config DISPLAY_SUPPORT
  83                 bool "Show packages that require graphics support (local or remote)"
  84
  85         config BUILD_PATENTED
  86                 bool "Compile with support for patented functionality"
  87                 help
  88                   When this option is disabled, software which provides patented functionality
  89                   will not be built.  In case software provides optional support for patented
  90                   functionality, this optional support will get disabled for this package.
  91
  92         config BUILD_NLS
  93                 bool "Compile with full language support"
  94                 help
  95                   When this option is enabled, packages are built with the full versions of
  96                   iconv and GNU gettext instead of the default OpenWrt stubs. If uClibc is
  97                   used, it is also built with locale support.
  98
  99         config SHADOW_PASSWORDS
 100                 bool
 101                 default y
 102
 103         config CLEAN_IPKG
 104                 bool
 105                 prompt "Remove ipkg/opkg status data files in final images"
 106                 help
 107                   This removes all ipkg/opkg status data files from the target directory
 108                   before building the root filesystem.
 109
 110         config IPK_FILES_CHECKSUMS
 111                 bool
 112                 prompt "Record files checksums in package metadata"
 113                 help
 114                   This makes file checksums part of package metadata. It increases size
 115                   but provides you with pkg_check command to check for flash corruptions.
 116
 117         config INCLUDE_CONFIG
 118                 bool "Include build configuration in firmware" if DEVEL
 119                 help
 120                   If enabled, buildinfo files will be stored in /etc/build.* of firmware.
 121
 122         config REPRODUCIBLE_DEBUG_INFO
 123                 bool "Make debug information reproducible"
 124                 default BUILDBOT
 125                 help
 126                   This strips the local build path out of debug information. This has the
 127                   advantage of making it reproducible, but the disadvantage of making local
 128                   debugging using ./scripts/remote-gdb harder, since the debug data will
 129                   no longer point to the full path on the build host.
 130
 131         config COLLECT_KERNEL_DEBUG
 132                 bool
 133                 prompt "Collect kernel debug information"
 134                 select KERNEL_DEBUG_INFO
 135                 default BUILDBOT
 136                 help
 137                   This collects debugging symbols from the kernel and all compiled modules.
 138                   Useful for release builds, so that kernel issues can be debugged offline
 139                   later.
 140
 141         menu "Kernel build options"
 142
 143         source "config/Config-kernel.in"
 144
 145         endmenu
 146
 147         comment "Package build options"
 148
 149         config DEBUG
 150                 bool
 151                 prompt "Compile packages with debugging info"
 152                 help
 153                   Adds -g3 to the CFLAGS.
 154
 155         config USE_GC_SECTIONS
 156                 bool
 157                 prompt "Dead code and data elimination for all packages (EXPERIMENTAL)"
 158                 help
 159                   Places functions and data items into its own sections to use the linker's
 160                   garbage collection capabilites.
 161                   Packages can choose to opt-out via setting PKG_BUILD_FLAGS:=no-gc-sections
 162
 163         config USE_LTO
 164                 bool
 165                 prompt "Use the link-time optimizer for all packages (EXPERIMENTAL)"
 166                 help
 167                   Adds LTO flags to the CFLAGS and LDFLAGS.
 168                   Packages can choose to opt-out via setting PKG_BUILD_FLAGS:=no-lto
 169
 170         config MOLD
 171                 depends on (aarch64 || arm || i386 || i686 || m68k || powerpc || powerpc64 || sh4 || x86_64)
 172                 depends on !GCC_USE_VERSION_11
 173                 def_bool $(shell, ./config/check-hostcxx.sh 10 2 12)
 174
 175         config USE_MOLD
 176                 bool
 177                 prompt "Use the mold linker for all packages"
 178                 depends on MOLD
 179                 help
 180                   Link packages with mold, a modern linker
 181                   Packages can opt-out via setting PKG_BUILD_FLAGS:=no-mold
 182
 183         config IPV6
 184                 def_bool y
 185
 186         comment "Stripping options"
 187
 188         choice
 189                 prompt "Binary stripping method"
 190                 default USE_STRIP   if USE_GLIBC
 191                 default USE_SSTRIP
 192                 help
 193                   Select the binary stripping method you wish to use.
 194
 195                 config NO_STRIP
 196                         bool "none"
 197                         help
 198                           This will install unstripped binaries (useful for native
 199                           compiling/debugging).
 200
 201                 config USE_STRIP
 202                         bool "strip"
 203                         help
 204                           This will install binaries stripped using strip from binutils.
 205
 206                 config USE_SSTRIP
 207                         bool "sstrip"
 208                         depends on !USE_GLIBC
 209                         help
 210                           This will install binaries stripped using sstrip.
 211         endchoice
 212
 213         config STRIP_ARGS
 214                 string
 215                 prompt "Strip arguments"
 216                 depends on USE_STRIP
 217                 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
 218                 default "--strip-all"
 219                 help
 220                   Specifies arguments passed to the strip command when stripping binaries.
 221
 222         config SSTRIP_DISCARD_TRAILING_ZEROES
 223                 bool "Strip trailing zero bytes"
 224                 depends on USE_SSTRIP && !USE_MOLD
 225                 default y
 226                 help
 227                   Use sstrip's -z option to discard trailing zero bytes
 228
 229         config STRIP_KERNEL_EXPORTS
 230                 bool "Strip unnecessary exports from the kernel image"
 231                 help
 232                   Reduces kernel size by stripping unused kernel exports from the kernel
 233                   image.  Note that this might make the kernel incompatible with any kernel
 234                   modules that were not selected at the time the kernel image was created.
 235
 236         config USE_MKLIBS
 237                 bool "Strip unnecessary functions from libraries"
 238                 help
 239                   Reduces libraries to only those functions that are necessary for using all
 240                   selected packages (including those selected as <M>).  Note that this will
 241                   make the system libraries incompatible with most of the packages that are
 242                   not selected during the build process.
 243
 244         comment "Hardening build options"
 245
 246         config PKG_CHECK_FORMAT_SECURITY
 247                 bool
 248                 prompt "Enable gcc format-security"
 249                 default y
 250                 help
 251                   Add -Wformat -Werror=format-security to the CFLAGS.  You can disable
 252                   this per package by adding PKG_CHECK_FORMAT_SECURITY:=0 in the package
 253                   Makefile.
 254
 255         choice
 256                 prompt "User space ASLR PIE compilation"
 257                 default PKG_ASLR_PIE_NONE if ((SMALL_FLASH || LOW_MEMORY_FOOTPRINT) && !SDK)
 258                 default PKG_ASLR_PIE_REGULAR
 259                 help
 260                   Add -fPIC to CFLAGS and -specs=hardened-build-ld to LDFLAGS.
 261                   This enables package build as Position Independent Executables (PIE)
 262                   to protect against "return-to-text" attacks. This belongs to the
 263                   feature of Address Space Layout Randomisation (ASLR), which is
 264                   implemented by the kernel and the ELF loader by randomising the
 265                   location of memory allocations. This makes memory addresses harder
 266                   to predict when an attacker is attempting a memory-corruption exploit.
 267                   You can disable this per package by adding PKG_ASLR_PIE:=0 in the package
 268                   Makefile.
 269                   Be ware that ASLR increases the binary size.
 270                 config PKG_ASLR_PIE_NONE
 271                         bool "None"
 272                         help
 273                           PIE is deactivated for all applications
 274                 config PKG_ASLR_PIE_REGULAR
 275                         bool "Regular"
 276                         help
 277                           PIE is activated for some binaries, mostly network exposed applications
 278                 config PKG_ASLR_PIE_ALL
 279                         bool "All"
 280                         select BUSYBOX_DEFAULT_PIE
 281                         help
 282                           PIE is activated for all applications
 283         endchoice
 284
 285         choice
 286                 prompt "User space Stack-Smashing Protection"
 287                 default PKG_CC_STACKPROTECTOR_REGULAR
 288                 help
 289                   Enable GCC Stack Smashing Protection (SSP) for userspace applications
 290                 config PKG_CC_STACKPROTECTOR_NONE
 291                         bool "None"
 292                 config PKG_CC_STACKPROTECTOR_REGULAR
 293                         bool "Regular"
 294                 config PKG_CC_STACKPROTECTOR_STRONG
 295                         bool "Strong"
 296         endchoice
 297
 298         choice
 299                 prompt "Kernel space Stack-Smashing Protection"
 300                 default KERNEL_CC_STACKPROTECTOR_REGULAR
 301                 help
 302                   Enable GCC Stack-Smashing Protection (SSP) for the kernel
 303                 config KERNEL_CC_STACKPROTECTOR_NONE
 304                         bool "None"
 305                 config KERNEL_CC_STACKPROTECTOR_REGULAR
 306                         bool "Regular"
 307                 config KERNEL_CC_STACKPROTECTOR_STRONG
 308                         bool "Strong"
 309         endchoice
 310
 311         config KERNEL_STACKPROTECTOR
 312                 bool
 313                 default KERNEL_CC_STACKPROTECTOR_REGULAR || KERNEL_CC_STACKPROTECTOR_STRONG
 314
 315         config KERNEL_STACKPROTECTOR_STRONG
 316                 bool
 317                 default KERNEL_CC_STACKPROTECTOR_STRONG
 318
 319         choice
 320                 prompt "Enable buffer-overflows detection (FORTIFY_SOURCE)"
 321                 default PKG_FORTIFY_SOURCE_1
 322                 help
 323                   Enable the _FORTIFY_SOURCE macro which introduces additional
 324                   checks to detect buffer-overflows in the following standard library
 325                   functions: memcpy, mempcpy, memmove, memset, strcpy, stpcpy,
 326                   strncpy, strcat, strncat, sprintf, vsprintf, snprintf, vsnprintf,
 327                   gets.  "Conservative" (_FORTIFY_SOURCE set to 1) only introduces
 328                   checks that shouldn't change the behavior of conforming programs,
 329                   while "aggressive" (_FORTIFY_SOURCES set to 2) some more checking is
 330                   added, but some conforming programs might fail.
 331                 config PKG_FORTIFY_SOURCE_NONE
 332                         bool "None"
 333                 config PKG_FORTIFY_SOURCE_1
 334                         bool "Conservative"
 335                 config PKG_FORTIFY_SOURCE_2
 336                         bool "Aggressive"
 337         endchoice
 338
 339         choice
 340                 prompt "Enable RELRO protection"
 341                 default PKG_RELRO_FULL
 342                 help
 343                   Enable a link-time protection known as RELRO (Relocation Read Only)
 344                   which helps to protect from certain type of exploitation techniques
 345                   altering the content of some ELF sections. "Partial" RELRO makes the
 346                   .dynamic section not writeable after initialization, introducing
 347                   almost no performance penalty, while "full" RELRO also marks the GOT
 348                   as read-only at the cost of initializing all of it at startup.
 349                 config PKG_RELRO_NONE
 350                         bool "None"
 351                 config PKG_RELRO_PARTIAL
 352                         bool "Partial"
 353                 config PKG_RELRO_FULL
 354                         bool "Full"
 355         endchoice
 356
 357         config TARGET_ROOTFS_SECURITY_LABELS
 358                 bool
 359                 select KERNEL_SQUASHFS_XATTR
 360                 select KERNEL_EXT4_FS_SECURITY
 361                 select KERNEL_F2FS_FS_SECURITY
 362                 select KERNEL_UBIFS_FS_SECURITY
 363                 select KERNEL_JFFS2_FS_SECURITY
 364
 365         config SELINUX
 366                 bool "Enable SELinux"
 367                 select KERNEL_SECURITY_SELINUX
 368                 select TARGET_ROOTFS_SECURITY_LABELS
 369                 select PACKAGE_procd-selinux
 370                 select PACKAGE_busybox-selinux
 371                 help
 372                   This option enables SELinux kernel features, applies security labels
 373                   in squashfs rootfs and selects the selinux-variants of busybox and procd.
 374
 375                   Selecting this option results in about 0.5MiB of additional flash space
 376                   usage accounting for increased kernel and rootfs size.
 377
 378         choice
 379                 prompt "default SELinux type"
 380                 depends on TARGET_ROOTFS_SECURITY_LABELS
 381                 default SELINUXTYPE_dssp
 382                 help
 383                   Select SELinux policy to be installed and used for applying rootfs labels.
 384
 385                 config SELINUXTYPE_targeted
 386                         bool "targeted"
 387                         select PACKAGE_refpolicy
 388                         help
 389                           SELinux Reference Policy (refpolicy)
 390
 391                 config SELINUXTYPE_dssp
 392                         bool "dssp"
 393                         select PACKAGE_selinux-policy
 394                         help
 395                           Defensec SELinux Security Policy -- OpenWrt edition
 396
 397         endchoice
 398
 399         config SECCOMP
 400                 bool "Enable SECCOMP"
 401                 select KERNEL_SECCOMP
 402                 select PACKAGE_procd-seccomp
 403                 depends on (aarch64 || arm || armeb || mips || mipsel || mips64 || mips64el || i386 || powerpc || x86_64)
 404                 depends on !TARGET_uml
 405                 default y
 406                 help
 407                   This option enables seccomp kernel features to safely
 408                   execute untrusted bytecode and selects the seccomp-variants
 409                   of procd
 410
 411 endmenu