toolchain/toolchain-common.in

   1 # Generic toolchain options
   2
   3 # we want gdb config in the middle of both source and external
   4 # toolchains, but mconf won't let us source the same file twice,
   5 # so put it here instead
   6 source "package/gdb/Config.in.host"
   7
   8 comment "Toolchain Generic Options"
   9
  10 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64735
  11 # exception_ptr, nested_exception, and future from libstdc++ are not
  12 # available for architectures not supporting always lock-free atomic
  13 # ints before GCC 7
  14 config BR2_TOOLCHAIN_HAS_GCC_BUG_64735
  15         bool
  16         default y if BR2_nios2
  17         default y if BR2_ARM_CPU_ARMV4
  18         default y if BR2_ARM_CPU_ARMV5
  19         default y if BR2_sparc_v8
  20
  21 # https://sourceware.org/bugzilla/show_bug.cgi?id=19405
  22 config BR2_TOOLCHAIN_HAS_BINUTILS_BUG_19405
  23         bool
  24
  25 config BR2_TOOLCHAIN_HAS_NATIVE_RPC
  26         bool
  27
  28 config BR2_USE_WCHAR
  29         bool
  30
  31 config BR2_ENABLE_LOCALE
  32         bool
  33
  34 config BR2_INSTALL_LIBSTDCPP
  35         bool
  36
  37 config BR2_TOOLCHAIN_HAS_FORTRAN
  38         bool
  39
  40 config BR2_TOOLCHAIN_HAS_THREADS
  41         bool
  42
  43 config BR2_TOOLCHAIN_HAS_THREADS_DEBUG
  44         bool
  45
  46 config BR2_TOOLCHAIN_HAS_THREADS_NPTL
  47         bool
  48
  49 config BR2_TOOLCHAIN_HAS_SHADOW_PASSWORDS
  50         bool
  51
  52 config BR2_TOOLCHAIN_HAS_SSP
  53         bool
  54
  55 config BR2_TOOLCHAIN_SUPPORTS_PIE
  56         bool
  57
  58 config BR2_TOOLCHAIN_GLIBC_GCONV_LIBS_COPY
  59         bool "Copy gconv libraries"
  60         depends on BR2_TOOLCHAIN_USES_GLIBC
  61         help
  62           The gconv libraries are used to convert between different
  63           character sets (charsets).
  64
  65           Say 'y' if you need to store and/or display different charsets.
  66
  67 config BR2_TOOLCHAIN_GLIBC_GCONV_LIBS_LIST
  68         string "Gconv libraries to copy"
  69         depends on BR2_TOOLCHAIN_GLIBC_GCONV_LIBS_COPY
  70         help
  71           Set to the list of gconv libraries to copy.
  72           Leave empty to copy all gconv libraries.
  73
  74           Specify only the basename of the libraries, leave
  75           out the .so extension. Eg.:
  76             IBM850 ISO8859-15 UNICODE
  77
  78           Note: the full set of gconv libs are ~8MiB (on ARM).
  79
  80 # glibc and eglibc directly include gettext, so a separatly compiled
  81 # gettext isn't needed and shouldn't be built to avoid conflicts. Some
  82 # packages always need gettext, other packages only need gettext when
  83 # locale support is enabled. See the documentation for how packages
  84 # should rely on the following two options.
  85
  86 config BR2_NEEDS_GETTEXT
  87         bool
  88         default y if BR2_TOOLCHAIN_USES_UCLIBC
  89
  90 config BR2_NEEDS_GETTEXT_IF_LOCALE
  91         bool
  92         default y if (BR2_NEEDS_GETTEXT && BR2_ENABLE_LOCALE)
  93
  94 config BR2_USE_MMU
  95         bool "Enable MMU support" if BR2_ARCH_HAS_MMU_OPTIONAL
  96         default y if BR2_ARCH_HAS_MMU_OPTIONAL || BR2_ARCH_HAS_MMU_MANDATORY
  97         help
  98           If your target has a MMU, you should say Y here.  If you
  99           are unsure, just say Y.
 100
 101 config BR2_TARGET_OPTIMIZATION
 102         string "Target Optimizations"
 103         default ""
 104         help
 105           Optimizations to use when building for the target host.
 106           NOTE: gcc optimization level is defined in build options.
 107
 108 config BR2_TARGET_LDFLAGS
 109         string "Target linker options"
 110         help
 111           Extra options to pass to the linker when building for the target.
 112
 113           Note that options with a '$' sign (eg. -Wl,-rpath='$ORIGIN/../lib')
 114           are not supported.
 115
 116 config BR2_ECLIPSE_REGISTER
 117         bool "Register toolchain within Eclipse Buildroot plug-in"
 118         help
 119           This options tells Buildroot to generate the necessary
 120           configuration files to make your toolchain appear within
 121           Eclipse, through the Eclipse Buildroot plugin.
 122
 123 # Options for packages to depend on, if they require at least a
 124 # specific version of the kernel headers.
 125 # Toolchains should choose the adequate option (ie. the highest
 126 # version, not all of them).
 127 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0
 128         bool
 129
 130 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_1
 131         bool
 132         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0
 133
 134 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
 135         bool
 136         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_1
 137
 138 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_3
 139         bool
 140         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
 141
 142 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_4
 143         bool
 144         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_3
 145
 146 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_5
 147         bool
 148         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_4
 149
 150 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_6
 151         bool
 152         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_5
 153
 154 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_7
 155         bool
 156         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_6
 157
 158 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_8
 159         bool
 160         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_7
 161
 162 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_9
 163         bool
 164         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_8
 165
 166 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10
 167         bool
 168         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_9
 169
 170 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_11
 171         bool
 172         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10
 173
 174 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12
 175         bool
 176         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_11
 177
 178 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_13
 179         bool
 180         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12
 181
 182 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_14
 183         bool
 184         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_13
 185
 186 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_15
 187         bool
 188         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_14
 189
 190 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_16
 191         bool
 192         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_15
 193
 194 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17
 195         bool
 196         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_16
 197
 198 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_18
 199         bool
 200         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17
 201
 202 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_19
 203         bool
 204         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_18
 205
 206 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_0
 207         bool
 208         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_19
 209
 210 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_1
 211         bool
 212         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_0
 213
 214 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_2
 215         bool
 216         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_1
 217
 218 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3
 219         bool
 220         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_2
 221
 222 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_4
 223         bool
 224         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3
 225
 226 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_5
 227         bool
 228         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_4
 229
 230 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_6
 231         bool
 232         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_5
 233
 234 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_7
 235         bool
 236         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_6
 237
 238 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_8
 239         bool
 240         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_7
 241
 242 config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_9
 243         bool
 244         select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_8
 245
 246 # This order guarantees that the highest version is set, as kconfig
 247 # stops affecting a value on the first matching default.
 248 config BR2_TOOLCHAIN_HEADERS_AT_LEAST
 249         string
 250         default "4.9"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_9
 251         default "4.8"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_8
 252         default "4.7"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_7
 253         default "4.6"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_6
 254         default "4.5"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_5
 255         default "4.4"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_4
 256         default "4.3"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3
 257         default "4.2"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_2
 258         default "4.1"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_1
 259         default "4.0"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_0
 260         default "3.19" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_19
 261         default "3.18" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_18
 262         default "3.17" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17
 263         default "3.16" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_16
 264         default "3.15" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_15
 265         default "3.14" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_14
 266         default "3.13" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_13
 267         default "3.12" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12
 268         default "3.11" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_11
 269         default "3.10" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10
 270         default "3.9"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_9
 271         default "3.8"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_8
 272         default "3.7"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_7
 273         default "3.6"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_6
 274         default "3.5"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_5
 275         default "3.4"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_4
 276         default "3.3"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_3
 277         default "3.2"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
 278         default "3.1"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_1
 279         default "3.0"  if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0
 280         default "2.6"
 281
 282 config BR2_TOOLCHAIN_GCC_AT_LEAST_4_3
 283         bool
 284
 285 config BR2_TOOLCHAIN_GCC_AT_LEAST_4_4
 286         bool
 287         select BR2_TOOLCHAIN_GCC_AT_LEAST_4_3
 288
 289 config BR2_TOOLCHAIN_GCC_AT_LEAST_4_5
 290         bool
 291         select BR2_TOOLCHAIN_GCC_AT_LEAST_4_4
 292
 293 config BR2_TOOLCHAIN_GCC_AT_LEAST_4_6
 294         bool
 295         select BR2_TOOLCHAIN_GCC_AT_LEAST_4_5
 296
 297 config BR2_TOOLCHAIN_GCC_AT_LEAST_4_7
 298         bool
 299         select BR2_TOOLCHAIN_GCC_AT_LEAST_4_6
 300
 301 config BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
 302         bool
 303         select BR2_TOOLCHAIN_GCC_AT_LEAST_4_7
 304
 305 config BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
 306         bool
 307         select BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
 308
 309 config BR2_TOOLCHAIN_GCC_AT_LEAST_5
 310         bool
 311         select BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
 312
 313 config BR2_TOOLCHAIN_GCC_AT_LEAST_6
 314         bool
 315         select BR2_TOOLCHAIN_GCC_AT_LEAST_5
 316
 317 # This order guarantees that the highest version is set, as kconfig
 318 # stops affecting a value on the first matching default.
 319 config BR2_TOOLCHAIN_GCC_AT_LEAST
 320         string
 321         default "6"     if BR2_TOOLCHAIN_GCC_AT_LEAST_6
 322         default "5"     if BR2_TOOLCHAIN_GCC_AT_LEAST_5
 323         default "4.9"   if BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
 324         default "4.8"   if BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
 325         default "4.7"   if BR2_TOOLCHAIN_GCC_AT_LEAST_4_7
 326         default "4.6"   if BR2_TOOLCHAIN_GCC_AT_LEAST_4_6
 327         default "4.5"   if BR2_TOOLCHAIN_GCC_AT_LEAST_4_5
 328         default "4.4"   if BR2_TOOLCHAIN_GCC_AT_LEAST_4_4
 329         default "4.3"   if BR2_TOOLCHAIN_GCC_AT_LEAST_4_3
 330
 331 config BR2_TOOLCHAIN_HAS_SYNC_1
 332         bool
 333         default y
 334         depends on !BR2_bfin
 335         depends on !BR2_m68k_cf
 336         depends on !BR2_microblaze
 337         depends on !BR2_sparc
 338         depends on !(BR2_arc && !BR2_ARC_ATOMIC_EXT)
 339
 340 config BR2_TOOLCHAIN_HAS_SYNC_2
 341         bool
 342         default y if BR2_TOOLCHAIN_HAS_SYNC_1
 343
 344 config BR2_TOOLCHAIN_HAS_SYNC_4
 345         bool
 346         default y
 347         depends on !BR2_m68k_cf
 348         depends on !BR2_sparc
 349         depends on !(BR2_arc && !BR2_ARC_ATOMIC_EXT)
 350
 351 # The availability of __sync for 8-byte types on ARM is somewhat
 352 # complicated:
 353 #
 354 #  - It appeared in gcc starting with gcc 4.7.
 355 #
 356 #  - On ARMv7, there is no problem, it can be directly implemented in
 357 #    userspace.
 358 #
 359 #  - On < ARMv7, it requires help from the kernel. Unfortunately, the
 360 #    libgcc code implementing 8-byte __sync with the help from the
 361 #    kernel calls __write() when a failure occurs, which is a function
 362 #    internal to glibc, not available in uClibc and musl. This means
 363 #    that the 8-byte __sync operations are not available on < ARMv7
 364 #    with uClibc and musl. This problem was fixed as part of gcc
 365 #    PR68059, which was backported to the gcc 5 branch, but isn't yet
 366 #    part of any gcc 5.x release.
 367 #
 368 config BR2_TOOLCHAIN_ARM_HAS_SYNC_8
 369         bool
 370         default y
 371         depends on BR2_arm || BR2_armeb
 372         depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_7
 373         depends on BR2_TOOLCHAIN_USES_GLIBC || BR2_ARM_CPU_ARMV7A
 374
 375 # 8-byte intrinsics available on most x86 CPUs, except a few old ones
 376 config BR2_TOOLCHAIN_X86_HAS_SYNC_8
 377         bool
 378         default y
 379         depends on BR2_i386
 380         depends on !BR2_x86_i486
 381         depends on !BR2_x86_c3
 382         depends on !BR2_x86_winchip_c6
 383         depends on !BR2_x86_winchip2
 384
 385 # 8-byte intrinsics available:
 386 #  - On all 64 bits architecture
 387 #  - On a certain combinations of ARM platforms
 388 #  - On certain x86 32 bits CPUs
 389 config BR2_TOOLCHAIN_HAS_SYNC_8
 390         bool
 391         default y if BR2_ARCH_IS_64
 392         default y if BR2_TOOLCHAIN_ARM_HAS_SYNC_8
 393         default y if BR2_TOOLCHAIN_X86_HAS_SYNC_8
 394
 395 # libatomic is available since gcc 4.8, when thread support is
 396 # enabled. Also, libatomic doesn't recognize "uclinux" as a valid OS
 397 # part of the tuple, and is therefore not build on uclinux targets,
 398 # which is why BR2_BINFMT_FLAT configurations are excluded.
 399 config BR2_TOOLCHAIN_HAS_LIBATOMIC
 400         bool
 401         default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 && \
 402                 BR2_TOOLCHAIN_HAS_THREADS && \
 403                 !BR2_BINFMT_FLAT
 404
 405 # __atomic intrinsics are available:
 406 # - with gcc 4.8, either through built-ins or libatomic, on all
 407 #   architectures. Since we don't want to separate the cases where
 408 #   libatomic is needed vs. not needed, we simplify thing and only
 409 #   support situations where libatomic is available, even if on some
 410 #   architectures libatomic is not strictly needed as all __atomic
 411 #   intrinsics might be built-in. The only case where libatomic is
 412 #   missing entirely is when the toolchain does not have support for
 413 #   threads. However, a package that does not need threads but still
 414 #   uses atomics is quite a corner case, which does not warrant the
 415 #   added complexity.
 416 # - with gcc 4.7, libatomic did not exist, so only built-ins are
 417 #   available. This means that __atomic can only be used in a subset
 418 #   of the architectures
 419 config BR2_TOOLCHAIN_HAS_ATOMIC
 420         bool
 421         default y if BR2_TOOLCHAIN_HAS_LIBATOMIC
 422         default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 && BR2_arm
 423         default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 && BR2_armeb
 424         default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 && BR2_xtensa
 425         default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 && BR2_ARCH_IS_64
 426
 427 # - libquadmath is not needed/available on all architectures (but gcc
 428 #   correctly handles this already).
 429 # - At least, libquadmath is available on:
 430 #   - i*86
 431 #   - x86_64
 432 # - When available, libquadmath requires wchar support.
 433 config BR2_TOOLCHAIN_HAS_LIBQUADMATH
 434         bool
 435         default y if BR2_i386 || BR2_x86_64