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 IPV6
 156                 def_bool y
 157
 158         comment "Stripping options"
 159
 160         choice
 161                 prompt "Binary stripping method"
 162                 default USE_STRIP   if USE_GLIBC
 163                 default USE_SSTRIP
 164                 help
 165                   Select the binary stripping method you wish to use.
 166
 167                 config NO_STRIP
 168                         bool "none"
 169                         help
 170                           This will install unstripped binaries (useful for native
 171                           compiling/debugging).
 172
 173                 config USE_STRIP
 174                         bool "strip"
 175                         help
 176                           This will install binaries stripped using strip from binutils.
 177
 178
 179                 config USE_SSTRIP
 180                         bool "sstrip"
 181                         depends on !USE_GLIBC
 182                         help
 183                           This will install binaries stripped using sstrip.
 184         endchoice
 185
 186         config STRIP_ARGS
 187                 string
 188                 prompt "Strip arguments"
 189                 depends on USE_STRIP
 190                 default "--strip-unneeded --remove-section=.comment --remove-section=.note" if DEBUG
 191                 default "--strip-all"
 192                 help
 193                   Specifies arguments passed to the strip command when stripping binaries.
 194
 195         config SSTRIP_ARGS
 196                 string
 197                 prompt "Sstrip arguments"
 198                 depends on USE_SSTRIP
 199                 default "-z"
 200                 help
 201                   Specifies arguments passed to the sstrip command when stripping binaries.
 202
 203         config STRIP_KERNEL_EXPORTS
 204                 bool "Strip unnecessary exports from the kernel image"
 205                 help
 206                   Reduces kernel size by stripping unused kernel exports from the kernel
 207                   image.  Note that this might make the kernel incompatible with any kernel
 208                   modules that were not selected at the time the kernel image was created.
 209
 210         config USE_MKLIBS
 211                 bool "Strip unnecessary functions from libraries"
 212                 help
 213                   Reduces libraries to only those functions that are necessary for using all
 214                   selected packages (including those selected as <M>).  Note that this will
 215                   make the system libraries incompatible with most of the packages that are
 216                   not selected during the build process.
 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         config TARGET_ROOTFS_SECURITY_LABELS
 332                 bool
 333                 select KERNEL_SQUASHFS_XATTR
 334                 select KERNEL_EXT4_FS_SECURITY
 335                 select KERNEL_F2FS_FS_SECURITY
 336                 select KERNEL_UBIFS_FS_SECURITY
 337                 select KERNEL_JFFS2_FS_SECURITY
 338
 339         config SELINUX
 340                 bool "Enable SELinux"
 341                 select KERNEL_SECURITY_SELINUX
 342                 select TARGET_ROOTFS_SECURITY_LABELS
 343                 select PACKAGE_procd-selinux
 344                 select PACKAGE_busybox-selinux
 345                 help
 346                   This option enables SELinux kernel features, applies security labels
 347                   in squashfs rootfs and selects the selinux-variants of busybox and procd.
 348
 349                   Selecting this option results in about 0.5MiB of additional flash space
 350                   usage accounting for increased kernel and rootfs size.
 351
 352         choice
 353                 prompt "default SELinux type"
 354                 depends on TARGET_ROOTFS_SECURITY_LABELS
 355                 default SELINUXTYPE_dssp
 356                 help
 357                   Select SELinux policy to be installed and used for applying rootfs labels.
 358
 359                 config SELINUXTYPE_targeted
 360                         bool "targeted"
 361                         select PACKAGE_refpolicy
 362                         help
 363                           SELinux Reference Policy (refpolicy)
 364
 365                 config SELINUXTYPE_dssp
 366                         bool "dssp"
 367                         select PACKAGE_selinux-policy
 368                         help
 369                           Defensec SELinux Security Policy -- OpenWrt edition
 370
 371         endchoice
 372
 373         config SECCOMP
 374                 bool "Enable SECCOMP"
 375                 select KERNEL_SECCOMP
 376                 select PACKAGE_procd-seccomp
 377                 depends on (aarch64 || arm || armeb || mips || mipsel || mips64 || mips64el || i386 || powerpc || x86_64)
 378                 depends on !TARGET_uml
 379                 default y
 380                 help
 381                   This option enables seccomp kernel features to safely
 382                   execute untrusted bytecode and selects the seccomp-variants
 383                   of procd
 384
 385 endmenu