Config.in 18 KB

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  1. menu "Toolchain"
  2. # Invisible option that makes sure the toolchain package always gets
  3. # built
  4. config BR2_TOOLCHAIN
  5. bool
  6. default y
  7. # Should be selected for glibc or eglibc
  8. config BR2_TOOLCHAIN_USES_GLIBC
  9. bool
  10. select BR2_USE_WCHAR
  11. select BR2_ENABLE_LOCALE
  12. select BR2_TOOLCHAIN_HAS_FULL_GETTEXT
  13. select BR2_TOOLCHAIN_HAS_THREADS
  14. select BR2_TOOLCHAIN_HAS_THREADS_DEBUG
  15. select BR2_TOOLCHAIN_HAS_THREADS_NPTL
  16. select BR2_TOOLCHAIN_HAS_UCONTEXT
  17. select BR2_TOOLCHAIN_SUPPORTS_PIE
  18. config BR2_TOOLCHAIN_USES_UCLIBC
  19. bool
  20. # ucontext is only available for a subset of the supported
  21. # architectures
  22. select BR2_TOOLCHAIN_HAS_UCONTEXT if BR2_ARM_CPU_HAS_ARM || BR2_i386 \
  23. || BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el \
  24. || BR2_sparc || BR2_x86_64
  25. select BR2_TOOLCHAIN_SUPPORTS_PIE if !BR2_m68k && !BR2_microblaze && !BR2_STATIC_LIBS
  26. config BR2_TOOLCHAIN_USES_MUSL
  27. bool
  28. select BR2_USE_WCHAR
  29. select BR2_ENABLE_LOCALE
  30. select BR2_TOOLCHAIN_HAS_THREADS
  31. select BR2_TOOLCHAIN_HAS_THREADS_DEBUG
  32. select BR2_TOOLCHAIN_HAS_THREADS_NPTL
  33. select BR2_TOOLCHAIN_HAS_UCONTEXT
  34. select BR2_TOOLCHAIN_SUPPORTS_PIE if !BR2_STATIC_LIBS
  35. choice
  36. prompt "Toolchain type"
  37. help
  38. Select whether to use the toolchain provided by buildroot
  39. or an external toolchain.
  40. Some vendors provide toolchains in binary form, some in
  41. source form.
  42. config BR2_TOOLCHAIN_BUILDROOT
  43. bool "Buildroot toolchain"
  44. depends on BR2_ARCH_HAS_TOOLCHAIN_BUILDROOT
  45. config BR2_TOOLCHAIN_EXTERNAL
  46. bool "External toolchain"
  47. help
  48. Select if you want to use an existing cross-compiling
  49. toolchain. Buildroot can either download automatically a
  50. toolchain, or use an already installed toolchain.
  51. endchoice
  52. source "toolchain/toolchain-buildroot/Config.in"
  53. source "toolchain/toolchain-external/Config.in"
  54. # Generic toolchain options
  55. # we want gdb config in the middle of both source and external
  56. # toolchains, but mconf won't let us source the same file twice,
  57. # so put it here instead
  58. source "package/gdb/Config.in.host"
  59. comment "Toolchain Generic Options"
  60. # https://sourceware.org/bugzilla/show_bug.cgi?id=19615
  61. # Affect toolchains built with binutils 2.26 (fixed in binutils 2.26.1).
  62. config BR2_TOOLCHAIN_HAS_BINUTILS_BUG_19615
  63. bool
  64. # https://sourceware.org/bugzilla/show_bug.cgi?id=20006
  65. # Affect toolchains built with binutils 2.26 (fixed in binutils 2.26.1).
  66. config BR2_TOOLCHAIN_HAS_BINUTILS_BUG_20006
  67. bool
  68. # Atomic types can be:
  69. # - never lock-free
  70. # - sometimes lock-free
  71. # - always lock-free
  72. # see https://en.cppreference.com/w/c/atomic/ATOMIC_LOCK_FREE_consts
  73. #
  74. # On most architectures, gcc provides "always lock-free" atomic types,
  75. # but a few architectures are limited to "sometimes lock-free"
  76. # types. This hidden option allows to know if the architecture
  77. # provides "always lock-free" atomic types.
  78. config BR2_TOOLCHAIN_SUPPORTS_ALWAYS_LOCKFREE_ATOMIC_INTS
  79. bool
  80. default y
  81. depends on !BR2_nios2
  82. depends on !BR2_ARM_CPU_ARMV4
  83. depends on !BR2_ARM_CPU_ARMV5
  84. depends on !BR2_sparc_v8
  85. depends on !BR2_m68k_cf5208
  86. # GCC uses thunk functions to adjust the 'this' pointer when calling
  87. # C++ member functions in classes derived with multiple inheritance.
  88. # Generation of thunk functions requires support from the compiler
  89. # back end. In the absence of that support target-independent code
  90. # in the C++ front end is used to generate thunk functions, but it
  91. # does not support vararg functions.
  92. # or1k will support it in the gcc mainline starting with gcc-9.
  93. config BR2_TOOLCHAIN_SUPPORTS_VARIADIC_MI_THUNK
  94. bool
  95. default y
  96. depends on !BR2_or1k
  97. depends on !BR2_xtensa
  98. # Prior to gcc 7.x, exception_ptr, nested_exception and future from
  99. # libstdc++ would only be provided on architectures that support
  100. # always lock-free atomic ints. See
  101. # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64735. This issue has
  102. # been removed in GCC 7.x, where exception propagation is now
  103. # supported without lock-free atomic int.
  104. config BR2_TOOLCHAIN_HAS_GCC_BUG_64735
  105. bool
  106. default y if !BR2_TOOLCHAIN_SUPPORTS_ALWAYS_LOCKFREE_ATOMIC_INTS && \
  107. !BR2_TOOLCHAIN_GCC_AT_LEAST_7
  108. # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68485. This bug still
  109. # exists in gcc 9.x
  110. config BR2_TOOLCHAIN_HAS_GCC_BUG_68485
  111. bool
  112. default y if BR2_microblaze
  113. # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85180. This bug no
  114. # longer exists in gcc 8.x.
  115. config BR2_TOOLCHAIN_HAS_GCC_BUG_85180
  116. bool
  117. default y if BR2_microblaze
  118. depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_8
  119. # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85862
  120. # An infinite loop exists in the find_base_term() logic of 6.x
  121. # on microblaze. http://autobuild.buildroot.net/results/158e8ebb39713e1b436a5cc1a1916f46c30694df/
  122. config BR2_TOOLCHAIN_HAS_GCC_BUG_85862
  123. bool
  124. default y if BR2_microblaze
  125. depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_7
  126. config BR2_TOOLCHAIN_HAS_NATIVE_RPC
  127. bool
  128. config BR2_USE_WCHAR
  129. bool
  130. config BR2_ENABLE_LOCALE
  131. bool
  132. config BR2_INSTALL_LIBSTDCPP
  133. bool
  134. config BR2_TOOLCHAIN_HAS_FORTRAN
  135. bool
  136. config BR2_TOOLCHAIN_HAS_THREADS
  137. bool
  138. config BR2_TOOLCHAIN_HAS_THREADS_DEBUG
  139. bool
  140. config BR2_TOOLCHAIN_HAS_THREADS_NPTL
  141. bool
  142. config BR2_TOOLCHAIN_HAS_SSP
  143. bool
  144. config BR2_TOOLCHAIN_HAS_UCONTEXT
  145. bool
  146. config BR2_TOOLCHAIN_SUPPORTS_PIE
  147. bool
  148. config BR2_TOOLCHAIN_GLIBC_GCONV_LIBS_COPY
  149. bool "Copy gconv libraries"
  150. depends on BR2_TOOLCHAIN_USES_GLIBC
  151. help
  152. The gconv libraries are used to convert between different
  153. character sets (charsets).
  154. Say 'y' if you need to store and/or display different
  155. charsets.
  156. config BR2_TOOLCHAIN_GLIBC_GCONV_LIBS_LIST
  157. string "Gconv libraries to copy"
  158. depends on BR2_TOOLCHAIN_GLIBC_GCONV_LIBS_COPY
  159. help
  160. Set to the list of gconv libraries to copy.
  161. Leave empty to copy all gconv libraries.
  162. Specify only the basename of the libraries, leave
  163. out the .so extension. Eg.:
  164. IBM850 ISO8859-15 UNICODE
  165. Note: the full set of gconv libs are ~8MiB (on ARM).
  166. # This boolean is true if the toolchain provides a built-in full
  167. # featured gettext implementation (glibc), and false if only a stub
  168. # gettext implementation is provided (uclibc, musl)
  169. config BR2_TOOLCHAIN_HAS_FULL_GETTEXT
  170. bool
  171. config BR2_USE_MMU
  172. bool "Enable MMU support" if BR2_ARCH_HAS_MMU_OPTIONAL
  173. default y if BR2_ARCH_HAS_MMU_OPTIONAL || BR2_ARCH_HAS_MMU_MANDATORY
  174. help
  175. If your target has a MMU, you should say Y here. If you
  176. are unsure, just say Y.
  177. config BR2_TARGET_OPTIMIZATION
  178. string "Target Optimizations"
  179. default ""
  180. help
  181. Optimizations to use when building for the target host.
  182. NOTE: gcc optimization level is defined in build options.
  183. config BR2_TARGET_LDFLAGS
  184. string "Target linker options"
  185. help
  186. Extra options to pass to the linker when building for the
  187. target.
  188. Note that options with a '$' sign (eg.
  189. -Wl,-rpath='$ORIGIN/../lib') are not supported.
  190. config BR2_ECLIPSE_REGISTER
  191. bool "Register toolchain within Eclipse Buildroot plug-in"
  192. help
  193. This options tells Buildroot to generate the necessary
  194. configuration files to make your toolchain appear within
  195. Eclipse, through the Eclipse Buildroot plugin.
  196. # Options for packages to depend on, if they require at least a
  197. # specific version of the kernel headers.
  198. # Toolchains should choose the adequate option (ie. the highest
  199. # version, not all of them).
  200. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0
  201. bool
  202. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_1
  203. bool
  204. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0
  205. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
  206. bool
  207. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_1
  208. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_3
  209. bool
  210. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
  211. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_4
  212. bool
  213. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_3
  214. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_5
  215. bool
  216. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_4
  217. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_6
  218. bool
  219. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_5
  220. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_7
  221. bool
  222. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_6
  223. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_8
  224. bool
  225. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_7
  226. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_9
  227. bool
  228. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_8
  229. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10
  230. bool
  231. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_9
  232. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_11
  233. bool
  234. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10
  235. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12
  236. bool
  237. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_11
  238. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_13
  239. bool
  240. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12
  241. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_14
  242. bool
  243. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_13
  244. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_15
  245. bool
  246. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_14
  247. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_16
  248. bool
  249. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_15
  250. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17
  251. bool
  252. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_16
  253. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_18
  254. bool
  255. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17
  256. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_19
  257. bool
  258. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_18
  259. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_0
  260. bool
  261. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_19
  262. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_1
  263. bool
  264. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_0
  265. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_2
  266. bool
  267. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_1
  268. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3
  269. bool
  270. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_2
  271. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_4
  272. bool
  273. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3
  274. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_5
  275. bool
  276. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_4
  277. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_6
  278. bool
  279. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_5
  280. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_7
  281. bool
  282. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_6
  283. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_8
  284. bool
  285. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_7
  286. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_9
  287. bool
  288. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_8
  289. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_10
  290. bool
  291. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_9
  292. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_11
  293. bool
  294. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_10
  295. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_12
  296. bool
  297. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_11
  298. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_13
  299. bool
  300. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_12
  301. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_14
  302. bool
  303. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_13
  304. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_15
  305. bool
  306. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_14
  307. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_16
  308. bool
  309. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_15
  310. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_17
  311. bool
  312. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_16
  313. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_18
  314. bool
  315. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_17
  316. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_19
  317. bool
  318. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_18
  319. config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_20
  320. bool
  321. select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_19
  322. # This order guarantees that the highest version is set, as kconfig
  323. # stops affecting a value on the first matching default.
  324. config BR2_TOOLCHAIN_HEADERS_AT_LEAST
  325. string
  326. default "4.20" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_20
  327. default "4.19" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_19
  328. default "4.18" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_18
  329. default "4.17" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_17
  330. default "4.16" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_16
  331. default "4.15" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_15
  332. default "4.14" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_14
  333. default "4.13" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_13
  334. default "4.12" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_12
  335. default "4.11" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_11
  336. default "4.10" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_10
  337. default "4.9" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_9
  338. default "4.8" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_8
  339. default "4.7" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_7
  340. default "4.6" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_6
  341. default "4.5" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_5
  342. default "4.4" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_4
  343. default "4.3" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3
  344. default "4.2" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_2
  345. default "4.1" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_1
  346. default "4.0" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_0
  347. default "3.19" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_19
  348. default "3.18" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_18
  349. default "3.17" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17
  350. default "3.16" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_16
  351. default "3.15" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_15
  352. default "3.14" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_14
  353. default "3.13" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_13
  354. default "3.12" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12
  355. default "3.11" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_11
  356. default "3.10" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10
  357. default "3.9" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_9
  358. default "3.8" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_8
  359. default "3.7" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_7
  360. default "3.6" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_6
  361. default "3.5" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_5
  362. default "3.4" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_4
  363. default "3.3" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_3
  364. default "3.2" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
  365. default "3.1" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_1
  366. default "3.0" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0
  367. default "2.6"
  368. config BR2_TOOLCHAIN_GCC_AT_LEAST_4_3
  369. bool
  370. config BR2_TOOLCHAIN_GCC_AT_LEAST_4_4
  371. bool
  372. select BR2_TOOLCHAIN_GCC_AT_LEAST_4_3
  373. config BR2_TOOLCHAIN_GCC_AT_LEAST_4_5
  374. bool
  375. select BR2_TOOLCHAIN_GCC_AT_LEAST_4_4
  376. config BR2_TOOLCHAIN_GCC_AT_LEAST_4_6
  377. bool
  378. select BR2_TOOLCHAIN_GCC_AT_LEAST_4_5
  379. config BR2_TOOLCHAIN_GCC_AT_LEAST_4_7
  380. bool
  381. select BR2_TOOLCHAIN_GCC_AT_LEAST_4_6
  382. config BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
  383. bool
  384. select BR2_TOOLCHAIN_GCC_AT_LEAST_4_7
  385. config BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
  386. bool
  387. select BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
  388. config BR2_TOOLCHAIN_GCC_AT_LEAST_5
  389. bool
  390. select BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
  391. config BR2_TOOLCHAIN_GCC_AT_LEAST_6
  392. bool
  393. select BR2_TOOLCHAIN_GCC_AT_LEAST_5
  394. config BR2_TOOLCHAIN_GCC_AT_LEAST_7
  395. bool
  396. select BR2_TOOLCHAIN_GCC_AT_LEAST_6
  397. config BR2_TOOLCHAIN_GCC_AT_LEAST_8
  398. bool
  399. select BR2_TOOLCHAIN_GCC_AT_LEAST_7
  400. # This order guarantees that the highest version is set, as kconfig
  401. # stops affecting a value on the first matching default.
  402. config BR2_TOOLCHAIN_GCC_AT_LEAST
  403. string
  404. default "8" if BR2_TOOLCHAIN_GCC_AT_LEAST_8
  405. default "7" if BR2_TOOLCHAIN_GCC_AT_LEAST_7
  406. default "6" if BR2_TOOLCHAIN_GCC_AT_LEAST_6
  407. default "5" if BR2_TOOLCHAIN_GCC_AT_LEAST_5
  408. default "4.9" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
  409. default "4.8" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
  410. default "4.7" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_7
  411. default "4.6" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_6
  412. default "4.5" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_5
  413. default "4.4" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_4
  414. default "4.3" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_3
  415. config BR2_TOOLCHAIN_HAS_MNAN_OPTION
  416. bool
  417. default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
  418. config BR2_TOOLCHAIN_HAS_SYNC_1
  419. bool
  420. default y
  421. depends on !BR2_m68k_cf
  422. depends on !BR2_microblaze
  423. depends on !BR2_sparc
  424. depends on !(BR2_arc && !BR2_ARC_ATOMIC_EXT)
  425. config BR2_TOOLCHAIN_HAS_SYNC_2
  426. bool
  427. default y if BR2_TOOLCHAIN_HAS_SYNC_1
  428. config BR2_TOOLCHAIN_HAS_SYNC_4
  429. bool
  430. default y
  431. depends on !BR2_m68k_cf
  432. depends on !BR2_sparc
  433. depends on !(BR2_arc && !BR2_ARC_ATOMIC_EXT)
  434. # The availability of __sync for 8-byte types on ARM is somewhat
  435. # complicated:
  436. #
  437. # - It appeared in gcc starting with gcc 4.7.
  438. #
  439. # - On ARMv7, there is no problem, it can be directly implemented in
  440. # userspace.
  441. #
  442. # - On < ARMv7, it requires help from the kernel. Unfortunately, the
  443. # libgcc code implementing 8-byte __sync with the help from the
  444. # kernel calls __write() when a failure occurs, which is a function
  445. # internal to glibc, not available in uClibc and musl. This means
  446. # that the 8-byte __sync operations are not available on < ARMv7
  447. # with uClibc and musl. This problem was fixed as part of gcc
  448. # PR68059, which was backported to the gcc 5 branch, but isn't yet
  449. # part of any gcc 5.x release.
  450. #
  451. config BR2_TOOLCHAIN_ARM_HAS_SYNC_8
  452. bool
  453. default y
  454. depends on BR2_arm || BR2_armeb
  455. depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_7
  456. depends on BR2_TOOLCHAIN_USES_GLIBC || BR2_ARM_CPU_ARMV7A
  457. # 8-byte intrinsics available on most x86 CPUs, except a few old ones
  458. config BR2_TOOLCHAIN_X86_HAS_SYNC_8
  459. bool
  460. default y
  461. depends on BR2_i386
  462. depends on !BR2_x86_i486
  463. depends on !BR2_x86_c3
  464. depends on !BR2_x86_winchip_c6
  465. depends on !BR2_x86_winchip2
  466. # 8-byte intrinsics available:
  467. # - On all 64 bits architecture
  468. # - On a certain combinations of ARM platforms
  469. # - On certain x86 32 bits CPUs
  470. config BR2_TOOLCHAIN_HAS_SYNC_8
  471. bool
  472. default y if BR2_ARCH_IS_64
  473. default y if BR2_TOOLCHAIN_ARM_HAS_SYNC_8
  474. default y if BR2_TOOLCHAIN_X86_HAS_SYNC_8
  475. # libatomic is available since gcc 4.8, when thread support is
  476. # enabled. Also, libatomic doesn't recognize "uclinux" as a valid OS
  477. # part of the tuple, and is therefore not build on uclinux targets,
  478. # which is why BR2_BINFMT_FLAT configurations are excluded.
  479. config BR2_TOOLCHAIN_HAS_LIBATOMIC
  480. bool
  481. default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 && \
  482. BR2_TOOLCHAIN_HAS_THREADS && \
  483. !BR2_BINFMT_FLAT
  484. # __atomic intrinsics are available:
  485. # - with gcc 4.8, either through built-ins or libatomic, on all
  486. # architectures. Since we don't want to separate the cases where
  487. # libatomic is needed vs. not needed, we simplify thing and only
  488. # support situations where libatomic is available, even if on some
  489. # architectures libatomic is not strictly needed as all __atomic
  490. # intrinsics might be built-in. The only case where libatomic is
  491. # missing entirely is when the toolchain does not have support for
  492. # threads. However, a package that does not need threads but still
  493. # uses atomics is quite a corner case, which does not warrant the
  494. # added complexity.
  495. # - with gcc 4.7, libatomic did not exist, so only built-ins are
  496. # available. This means that __atomic can only be used in a subset
  497. # of the architectures
  498. config BR2_TOOLCHAIN_HAS_ATOMIC
  499. bool
  500. default y if BR2_TOOLCHAIN_HAS_LIBATOMIC
  501. default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 && BR2_arm
  502. default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 && BR2_armeb
  503. default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 && BR2_xtensa
  504. default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 && BR2_ARCH_IS_64
  505. # - libquadmath is not needed/available on all architectures (but gcc
  506. # correctly handles this already).
  507. # - At least, libquadmath is available on:
  508. # - i*86
  509. # - x86_64
  510. # - When available, libquadmath requires wchar support.
  511. config BR2_TOOLCHAIN_HAS_LIBQUADMATH
  512. bool
  513. default y if BR2_i386 || BR2_x86_64
  514. endmenu