libcxx/lib/abi/CHANGELOG.TXT

   1 ABI Changelog
   2 ==============
   3 This changelog contains information about ABI changes in libc++. Specifically
   4 the addition and deletion of symbols from the libc++ dylib.
   5
   6 Each entry should start with the revision number followed by a description of
   7 the change. The entry should contain a summary of the ABI changes made,
   8 including what symbols were added, removed, or changed.
   9
  10 To generate a summary, re-generate the new ABI list using the
  11 `generate-cxx-abilist` target, and look at the diff.
  12
  13 New entries should be added directly below the "Version" header.
  14
  15 ------------
  16 Version 20.0
  17 ------------
  18
  19 * [libcxx][libc] Implements from_chars floating-point
  20
  21   All platforms
  22   -------------
  23   Symbol added: _ZNSt3__127__from_chars_floating_pointIdEENS_19__from_chars_resultIT_EEPKcS5_NS_12chars_formatE
  24   Symbol added: _ZNSt3__127__from_chars_floating_pointIfEENS_19__from_chars_resultIT_EEPKcS5_NS_12chars_formatE
  25
  26 * [libc++] Stop trying to avoid exporting some typeinfo names
  27
  28   This patch removes the explicit list of symbols to avoid exporting
  29   from the library, which at this point doesn't cover much anyways.
  30   That makes us export some new symbols on Appl platforms, namely the
  31   typeinfo names for some implementation-detail types. While we
  32   technically wouldn't have to export those (I don't think any user
  33   can get their hands on those typeinfo names), that makes the library
  34   more consistent on all platforms.
  35
  36   <arch>-apple-darwin
  37   -------------------
  38   Symbol added: __ZTSNSt3__114__codecvt_utf8IDsEE
  39   Symbol added: __ZTSNSt3__114__codecvt_utf8IwEE
  40   Symbol added: __ZTSNSt3__114__shared_countE
  41   Symbol added: __ZTSNSt3__114codecvt_bynameIDiDu11__mbstate_tEE
  42   Symbol added: __ZTSNSt3__114codecvt_bynameIDic11__mbstate_tEE
  43   Symbol added: __ZTSNSt3__114codecvt_bynameIDsDu11__mbstate_tEE
  44   Symbol added: __ZTSNSt3__114codecvt_bynameIDsc11__mbstate_tEE
  45   Symbol added: __ZTSNSt3__114codecvt_bynameIcc11__mbstate_tEE
  46   Symbol added: __ZTSNSt3__114codecvt_bynameIwc11__mbstate_tEE
  47   Symbol added: __ZTSNSt3__115__codecvt_utf16IDiLb0EEE
  48   Symbol added: __ZTSNSt3__115__codecvt_utf16IDiLb1EEE
  49   Symbol added: __ZTSNSt3__115__codecvt_utf16IDsLb0EEE
  50   Symbol added: __ZTSNSt3__115__codecvt_utf16IDsLb1EEE
  51   Symbol added: __ZTSNSt3__115__codecvt_utf16IwLb0EEE
  52   Symbol added: __ZTSNSt3__115__codecvt_utf16IwLb1EEE
  53   Symbol added: __ZTSNSt3__116__narrow_to_utf8ILm16EEE
  54   Symbol added: __ZTSNSt3__116__narrow_to_utf8ILm32EEE
  55   Symbol added: __ZTSNSt3__117__assoc_sub_stateE
  56   Symbol added: __ZTSNSt3__117__widen_from_utf8ILm16EEE
  57   Symbol added: __ZTSNSt3__117__widen_from_utf8ILm32EEE
  58   Symbol added: __ZTSNSt3__119__shared_weak_countE
  59   Symbol added: __ZTSNSt3__120__codecvt_utf8_utf16IDiEE
  60   Symbol added: __ZTSNSt3__120__codecvt_utf8_utf16IDsEE
  61   Symbol added: __ZTSNSt3__120__codecvt_utf8_utf16IwEE
  62
  63 ------------
  64 Version 19.0
  65 ------------
  66
  67 * [libc++] Avoid re-exporting a few specific symbols from libc++abi
  68
  69   In 6a884a9aef39, I synchronized the export list of libc++abi to the
  70   export list of libc++. From the linker's perspective, this caused
  71   these symbols to be taken from libc++.dylib instead of libc++abi.dylib.
  72
  73   However, that can be problematic when back-deploying. Indeed, this means
  74   that the linker will encode an undefined reference to be fullfilled by
  75   libc++.dylib, but when backdeploying against an older system, that symbol
  76   might only be available in libc++abi.dylib.
  77
  78   Most of the symbols that started being re-exported after 6a884a9aef39
  79   turn out to be implementation details of libc++abi, so nobody really
  80   depends on them and this back-deployment issue is inconsequential.
  81
  82   However, we ran into issues with a few of these symbols while testing
  83   LLVM 19, which led to this patch.
  84
  85   In the future, a follow-up cleanup would be to stop exporting most of
  86   the _cxxabiv1_foo_type_infoE symbols from both libc++abi and libc++
  87   since they are implementation details that nobody should be relying
  88   on.
  89
  90   <arch>-apple-darwin
  91   -------------------
  92   Symbol not reexported anymore: ___cxa_rethrow_primary_exception
  93   Symbol not reexported anymore: __ZTIN10__cxxabiv117__class_type_infoE
  94   Symbol not reexported anymore: __ZTIN10__cxxabiv120__si_class_type_infoE
  95   Symbol not reexported anymore: __ZTIN10__cxxabiv121__vmi_class_type_infoE
  96
  97 * [libc++] Always keep libc++abi re-exports up-to-date
  98
  99   This patch makes sure that the set of libc++abi symbols re-exported from libc++
 100   is up-to-date with the symbols that libc++abi re-exports. As such, it adds several
 101   symbols that were left out of the libc++ re-exports list. Exporting new symbols
 102   is not an ABI break.
 103
 104   <arch>-apple-darwin
 105   -------------------
 106   Symbol reexported: ___cxa_current_primary_exception
 107   Symbol reexported: ___cxa_decrement_exception_refcount
 108   Symbol reexported: ___cxa_increment_exception_refcount
 109   Symbol reexported: ___cxa_new_handler
 110   Symbol reexported: ___cxa_rethrow_primary_exception
 111   Symbol reexported: ___cxa_terminate_handler
 112   Symbol reexported: ___cxa_uncaught_exception
 113   Symbol reexported: ___cxa_unexpected_handler
 114   Symbol reexported: __ZTIDh
 115   Symbol reexported: __ZTIDu
 116   Symbol reexported: __ZTIg
 117   Symbol reexported: __ZTIn
 118   Symbol reexported: __ZTIN10__cxxabiv116__enum_type_infoE
 119   Symbol reexported: __ZTIN10__cxxabiv116__shim_type_infoE
 120   Symbol reexported: __ZTIN10__cxxabiv117__array_type_infoE
 121   Symbol reexported: __ZTIN10__cxxabiv117__class_type_infoE
 122   Symbol reexported: __ZTIN10__cxxabiv117__pbase_type_infoE
 123   Symbol reexported: __ZTIN10__cxxabiv119__pointer_type_infoE
 124   Symbol reexported: __ZTIN10__cxxabiv120__function_type_infoE
 125   Symbol reexported: __ZTIN10__cxxabiv120__si_class_type_infoE
 126   Symbol reexported: __ZTIN10__cxxabiv121__vmi_class_type_infoE
 127   Symbol reexported: __ZTIN10__cxxabiv123__fundamental_type_infoE
 128   Symbol reexported: __ZTIN10__cxxabiv129__pointer_to_member_type_infoE
 129   Symbol reexported: __ZTIo
 130   Symbol reexported: __ZTIPDh
 131   Symbol reexported: __ZTIPDu
 132   Symbol reexported: __ZTIPg
 133   Symbol reexported: __ZTIPKDh
 134   Symbol reexported: __ZTIPKDu
 135   Symbol reexported: __ZTIPKg
 136   Symbol reexported: __ZTIPKn
 137   Symbol reexported: __ZTIPKo
 138   Symbol reexported: __ZTIPn
 139   Symbol reexported: __ZTIPo
 140   Symbol reexported: __ZTSDh
 141   Symbol reexported: __ZTSDu
 142   Symbol reexported: __ZTSg
 143   Symbol reexported: __ZTSn
 144   Symbol reexported: __ZTSN10__cxxabiv116__shim_type_infoE
 145   Symbol reexported: __ZTSo
 146   Symbol reexported: __ZTSPDh
 147   Symbol reexported: __ZTSPDu
 148   Symbol reexported: __ZTSPg
 149   Symbol reexported: __ZTSPKDh
 150   Symbol reexported: __ZTSPKDu
 151   Symbol reexported: __ZTSPKg
 152   Symbol reexported: __ZTSPKn
 153   Symbol reexported: __ZTSPKo
 154   Symbol reexported: __ZTSPn
 155   Symbol reexported: __ZTSPo
 156   Symbol reexported: __ZTVN10__cxxabiv116__shim_type_infoE
 157
 158 ------------
 159 Version 18.0
 160 ------------
 161
 162 * [libc++] Moves is_terminal to the dylib
 163
 164   The patch moves the POSIX implementation of is_terminal to the dylib. This is
 165   needed to avoid using <unistd.h> in public headers.
 166
 167   All platforms
 168   Symbol added: _ZNSt6__ndk119__is_posix_terminalEP7__sFILE
 169
 170 * [libc++abi] Implement __cxa_init_primary_exception and use it to optimize std::make_exception_ptr (#65534)
 171
 172   This patch implements __cxa_init_primary_exception, an extension to the Itanium C++ ABI.
 173   This extension is already present in both libsupc++ and libcxxrt. This patch also starts
 174   making use of this function in std::make_exception_ptr: instead of going through a full
 175   throw/catch cycle, we are now able to initialize an exception directly, thus making
 176   std::make_exception_ptr around 30x faster. Adding a new symbol is not an ABI break.
 177
 178   All platforms
 179   -------------
 180   Symbol added: __cxa_init_primary_exception
 181
 182 * [libc++] Simplify the implementation of locale::id
 183
 184   This patch removes a symbol defined in the library for std::locale::id::__init().
 185   The symbol '__init' was defined as a private static function as part of the locale::id
 186   class and was never visible from outside the dylib. The addition of this symbol to the
 187   ABI was most likely accidental. The deletion of the symbol should not be a breaking change.
 188
 189   All platforms
 190   -------------
 191   Symbol removed: _ZNSt3__16locale2id6__initEv
 192
 193 * [libc++] Remove symbol for std::system_error from the dylib
 194
 195   This patch removes a symbol defined in the library for std::system_error.
 196   The symbol '__init' was defined as a private static function as part of the
 197   system_error class and was never visible. The addition of this symbol to the ABI was most likely accidental.
 198   The function '__init' is replaced by another equivalent function which is placed in the
 199   anonymous namespace of the std::system_error source code file.
 200   There are no internal references to this symbol which seems to support the reasoning that
 201   this was never used outside of the dylib.
 202   The deletion of the symbol should not be a breaking change.
 203
 204   All platforms
 205   -------------
 206   Symbol removed: _ZNSt3__112system_error6__initERKNS_10error_codeENS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 207
 208 ------------
 209 Version 17.0
 210 ------------
 211
 212 * [libc++] Remove symbols for a std::allocator_arg & friends from the dylib
 213
 214   This patch removes the symbols defined in the library for std::allocator_arg,
 215   std::defer_lock, std::try_to_lock, std::adopt_lock, and std::piecewise_construct.
 216   Those were defined in the library because we provided them in C++03 as an
 217   extension, and in C++03 it was impossible to define them as `constexpr`
 218   variables, as required by the Standard.
 219
 220   This is technically an ABI break since we are removing symbols from the
 221   library. However, in practice, only programs compiled in C++03 mode that
 222   take the address of those objects (or pass them as a reference) will have
 223   an undefined ref to those symbols. In practice, this is expected to be
 224   rare. First, those are C++11 features that we happen to provide in C++03,
 225   and only the C++03 definition can potentially lead to code referencing
 226   the dylib definition. So any code that is using these objects but compiling
 227   in C++11 mode (as they should) is not at risk. Second, all uses of these
 228   types in the library is done by passing those types by value to a function
 229   that can get inlined. Since they are empty types, the compiler won't
 230   generate an undefined reference if passed by value, since there's nothing
 231   to pass anyway.
 232
 233   Long story short, the risk for code actually containing an undefined
 234   reference to one of these types is rather small (but non-zero).
 235
 236   All platforms
 237   -------------
 238   Symbol removed: _ZNSt3__110adopt_lockE
 239   Symbol removed: _ZNSt3__110defer_lockE
 240   Symbol removed: _ZNSt3__111try_to_lockE
 241   Symbol removed: _ZNSt3__113allocator_argE
 242   Symbol removed: _ZNSt3__119piecewise_constructE
 243
 244 * [libc++] Remove explicit instantiations of __insertion_sort_incomplete and __sort5 from the dylib
 245
 246   These instantiations were never visible, because they are only used in `__sort`, which is also explicitly
 247   instantiated in the dylib.
 248
 249   All platforms
 250   -------------
 251   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIaaEEPaEEbT0_S5_T_
 252   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIccEEPcEEbT0_S5_T_
 253   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIddEEPdEEbT0_S5_T_
 254   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIeeEEPeEEbT0_S5_T_
 255   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIffEEPfEEbT0_S5_T_
 256   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIhhEEPhEEbT0_S5_T_
 257   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIiiEEPiEEbT0_S5_T_
 258   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIjjEEPjEEbT0_S5_T_
 259   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIllEEPlEEbT0_S5_T_
 260   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessImmEEPmEEbT0_S5_T_
 261   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIssEEPsEEbT0_S5_T_
 262   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIttEEPtEEbT0_S5_T_
 263   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIwwEEPwEEbT0_S5_T_
 264   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIxxEEPxEEbT0_S5_T_
 265   Symbol removed: _ZNSt3__127__insertion_sort_incompleteIRNS_6__lessIyyEEPyEEbT0_S5_T_
 266   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIeeEEPeEEjT0_S5_S5_S5_S5_T_
 267
 268 ------------
 269 Version 16.0
 270 ------------
 271
 272 * [libc++][PMR] Move the pmr::memory_resource destructor into the dylib
 273
 274   All platforms
 275   -------------
 276   Symbol added: _ZNSt3__13pmr15memory_resourceD0Ev
 277   Symbol added: _ZNSt3__13pmr15memory_resourceD1Ev
 278   Symbol added: _ZNSt3__13pmr15memory_resourceD2Ev
 279   Symbol added: _ZTVNSt3__13pmr15memory_resourceE
 280
 281 * [libc++] [C++17] Implement <memory_resource>.
 282
 283   This commit adds <memory_resource> to the shared library.
 284
 285   All platforms
 286   -------------
 287   Symbol added: _ZNKSt3__13pmr26synchronized_pool_resource11do_is_equalERKNS0_15memory_resourceE
 288   Symbol added: _ZNKSt3__13pmr28unsynchronized_pool_resource12__pool_indexEmm
 289   Symbol added: _ZNKSt3__13pmr28unsynchronized_pool_resource17__pool_block_sizeEi
 290   Symbol added: _ZNKSt3__13pmr28unsynchronized_pool_resource22__log2_pool_block_sizeEi
 291   Symbol added: _ZNKSt3__13pmr28unsynchronized_pool_resource7optionsEv
 292   Symbol added: _ZNSt3__13pmr19new_delete_resourceEv
 293   Symbol added: _ZNSt3__13pmr20get_default_resourceEv
 294   Symbol added: _ZNSt3__13pmr20null_memory_resourceEv
 295   Symbol added: _ZNSt3__13pmr20set_default_resourceEPNS0_15memory_resourceE
 296   Symbol added: _ZNSt3__13pmr25monotonic_buffer_resource11do_allocateEmm
 297   Symbol added: _ZNSt3__13pmr25monotonic_buffer_resource14__chunk_footer25__try_allocate_from_chunkEmm
 298   Symbol added: _ZNSt3__13pmr25monotonic_buffer_resource20__initial_descriptor25__try_allocate_from_chunkEmm
 299   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resource11do_allocateEmm
 300   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resource12__adhoc_pool13__do_allocateEPNS0_15memory_resourceEmm
 301   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resource12__adhoc_pool13__release_ptrEPNS0_15memory_resourceE
 302   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resource12__adhoc_pool15__do_deallocateEPNS0_15memory_resourceEPvmm
 303   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resource13do_deallocateEPvmm
 304   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resource7releaseEv
 305   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resourceC1ERKNS0_12pool_optionsEPNS0_15memory_resourceE
 306   Symbol added: _ZNSt3__13pmr28unsynchronized_pool_resourceC2ERKNS0_12pool_optionsEPNS0_15memory_resourceE
 307   Symbol added: _ZTINSt3__13pmr15memory_resourceE
 308   Symbol added: _ZTINSt3__13pmr25monotonic_buffer_resourceE
 309   Symbol added: _ZTINSt3__13pmr26__null_memory_resource_impE
 310   Symbol added: _ZTINSt3__13pmr26synchronized_pool_resourceE
 311   Symbol added: _ZTINSt3__13pmr28unsynchronized_pool_resourceE
 312   Symbol added: _ZTINSt3__13pmr32__new_delete_memory_resource_impE
 313   Symbol added: _ZTSNSt3__13pmr15memory_resourceE
 314   Symbol added: _ZTSNSt3__13pmr25monotonic_buffer_resourceE
 315   Symbol added: _ZTSNSt3__13pmr26__null_memory_resource_impE
 316   Symbol added: _ZTSNSt3__13pmr26synchronized_pool_resourceE
 317   Symbol added: _ZTSNSt3__13pmr28unsynchronized_pool_resourceE
 318   Symbol added: _ZTSNSt3__13pmr32__new_delete_memory_resource_impE
 319   Symbol added: _ZTVNSt3__13pmr25monotonic_buffer_resourceE
 320   Symbol added: _ZTVNSt3__13pmr26synchronized_pool_resourceE
 321   Symbol added: _ZTVNSt3__13pmr28unsynchronized_pool_resourceE
 322
 323 ------------
 324 Version 15.0
 325 ------------
 326
 327 * f1c30135417f - [libc++] Drop the legacy debug mode symbols by default
 328
 329   This commit removed symbols implementing debug mode in the non-debug
 330   configuration of the library. Using the debug mode now requires a
 331   differently-configured version of libc++. This is technically an ABI
 332   break, however any user having been using the debug mode support previously
 333   was already at risk of non-benign ODR violations, and in practice we
 334   never found it to work reliably.
 335
 336   All platforms
 337   -------------
 338   Symbol removed: _ZNKSt3__111__libcpp_db15__decrementableEPKv
 339   Symbol removed: _ZNKSt3__111__libcpp_db15__find_c_from_iEPv
 340   Symbol removed: _ZNKSt3__111__libcpp_db15__subscriptableEPKvl
 341   Symbol removed: _ZNKSt3__111__libcpp_db17__dereferenceableEPKv
 342   Symbol removed: _ZNKSt3__111__libcpp_db17__find_c_and_lockEPv
 343   Symbol removed: _ZNKSt3__111__libcpp_db22__less_than_comparableEPKvS2_
 344   Symbol removed: _ZNKSt3__111__libcpp_db6unlockEv
 345   Symbol removed: _ZNKSt3__111__libcpp_db8__find_cEPv
 346   Symbol removed: _ZNKSt3__111__libcpp_db9__addableEPKvl
 347   Symbol removed: _ZNKSt3__119__libcpp_debug_info4whatEv
 348   Symbol removed: _ZNSt3__111__libcpp_db10__insert_cEPvPFPNS_8__c_nodeES1_S1_S3_E
 349   Symbol removed: _ZNSt3__111__libcpp_db10__insert_iEPv
 350   Symbol removed: _ZNSt3__111__libcpp_db11__insert_icEPvPKv
 351   Symbol removed: _ZNSt3__111__libcpp_db15__iterator_copyEPvPKv
 352   Symbol removed: _ZNSt3__111__libcpp_db16__invalidate_allEPv
 353   Symbol removed: _ZNSt3__111__libcpp_db4swapEPvS1_
 354   Symbol removed: _ZNSt3__111__libcpp_db9__erase_cEPv
 355   Symbol removed: _ZNSt3__111__libcpp_db9__erase_iEPv
 356   Symbol removed: _ZNSt3__111__libcpp_dbC1Ev
 357   Symbol removed: _ZNSt3__111__libcpp_dbC2Ev
 358   Symbol removed: _ZNSt3__111__libcpp_dbD1Ev
 359   Symbol removed: _ZNSt3__111__libcpp_dbD2Ev
 360   Symbol removed: _ZNSt3__114__get_const_dbEv
 361   Symbol removed: _ZNSt3__123__libcpp_debug_functionE
 362   Symbol removed: _ZNSt3__127__libcpp_set_debug_functionEPFvRKNS_19__libcpp_debug_infoEE
 363   Symbol removed: _ZNSt3__129__libcpp_abort_debug_functionERKNS_19__libcpp_debug_infoE
 364   Symbol removed: _ZNSt3__18__c_node5__addEPNS_8__i_nodeE
 365   Symbol removed: _ZNSt3__18__c_nodeD0Ev
 366   Symbol removed: _ZNSt3__18__c_nodeD1Ev
 367   Symbol removed: _ZNSt3__18__c_nodeD2Ev
 368   Symbol removed: _ZNSt3__18__get_dbEv
 369   Symbol removed: _ZNSt3__18__i_nodeD1Ev
 370   Symbol removed: _ZNSt3__18__i_nodeD2Ev
 371   Symbol removed: _ZTINSt3__18__c_nodeE
 372   Symbol removed: _ZTSNSt3__18__c_nodeE
 373   Symbol removed: _ZTVNSt3__18__c_nodeE
 374
 375 * b0fd9497af6d, 7de5aca84c54 and 507125af3d0b - [libc++] Add a lightweight overridable assertion handler
 376
 377   This patch adds a lightweight assertion handler mechanism that can be
 378   overriden at link-time in a fashion similar to `operator new`. A default
 379   assertion handler is provided in the shared library, hence the added
 380   symbol.
 381
 382   All platforms
 383   -------------
 384   Symbol added: _ZNSt3__122__libcpp_verbose_abortEPKcz
 385
 386 ------------
 387 Version 14.0
 388 ------------
 389
 390 * abb5dd6e99df - [libc++] `to_chars` for floating point.
 391
 392   This commit added the `to_chars` implementation for floating point values.
 393   The entire implementation resides in the dylib and the functions specified
 394   in the Standard are now part of the ABI.
 395
 396   All platforms
 397   -------------
 398   Symbol added: _ZNSt3__18to_charsEPcS0_d
 399   Symbol added: _ZNSt3__18to_charsEPcS0_dNS_12chars_formatE
 400   Symbol added: _ZNSt3__18to_charsEPcS0_dNS_12chars_formatEi
 401   Symbol added: _ZNSt3__18to_charsEPcS0_e
 402   Symbol added: _ZNSt3__18to_charsEPcS0_eNS_12chars_formatE
 403   Symbol added: _ZNSt3__18to_charsEPcS0_eNS_12chars_formatEi
 404   Symbol added: _ZNSt3__18to_charsEPcS0_f
 405   Symbol added: _ZNSt3__18to_charsEPcS0_fNS_12chars_formatE
 406   Symbol added: _ZNSt3__18to_charsEPcS0_fNS_12chars_formatEi
 407
 408 * 049f6c29a6f0 - [libc++] Resolve missing table_size symbol
 409
 410   This commit added an out-of-line definition for `table_size` in the library.
 411   This is not an ABI break since we are just adding a symbol to the library.
 412   In fact, any program that would have attempted to refer to that symbol would
 413   have previously failed to link.
 414
 415   <arch>-apple-darwin
 416   -------------------------
 417   Symbol added: _ZNSt3__15ctypeIcE10table_sizeE
 418
 419   x86_64-unknown-linux-gnu
 420   ------------------------
 421   Symbol added: _ZNSt3__15ctypeIcE10table_sizeE
 422
 423 * 434dc0a5bcae - [libc++] Always define a key function for std::bad_function_call in the dylib
 424
 425   This commit added a new explicit instantiation of std::bad_function_call's
 426   vtable in the shared library. This change is not an ABI break as it only
 427   adds symbols to the library. Programs compiled against the library will not
 428   rely on the vtable being defined in it by default. Reliance on the vtable
 429   being in the shared library can be enabled by defining the
 430   _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION macro.
 431
 432   Note that this commit also causes the libc++ shared library to start relying
 433   on std::exception::what() being provided. This is due to the fact that the
 434   shared library now contains the vtable for std::bad_function_call, which
 435   references std::exception::what(). This shouldn't be an issue since that
 436   function needs to be available to users in order to use std::bad_function_call
 437   before this patch too.
 438
 439   All platforms
 440   -------------
 441   Symbol added: _ZNSt3__117bad_function_callD0Ev
 442   Symbol added: _ZNSt3__117bad_function_callD1Ev
 443   Symbol added: _ZNSt3__117bad_function_callD2Ev
 444   Symbol added: _ZTINSt3__117bad_function_callE
 445   Symbol added: _ZTSNSt3__117bad_function_callE
 446   Symbol added: _ZTVNSt3__117bad_function_callE
 447
 448   <arch>-unknown-linux-gnu
 449   ------------------------
 450   Added dependency on symbol: _ZNKSt9exception4whatEv
 451
 452 ------------
 453 Version 12.0
 454 ------------
 455
 456 * a984dcaf7c21 - [libc++] [P0482] [C++20] Implement missing bits for codecvt and codecvt_byname.
 457
 458   This commit added new instantiations with char8_t for classes codecvt and
 459   codecvt_byname in <locale> in the library.
 460
 461   All platforms
 462   -------------
 463   Symbol added: _ZNKSt3__17codecvtIDiDu11__mbstate_tE10do_unshiftERS1_PDuS4_RS4_
 464   Symbol added: _ZNKSt3__17codecvtIDiDu11__mbstate_tE11do_encodingEv
 465   Symbol added: _ZNKSt3__17codecvtIDiDu11__mbstate_tE13do_max_lengthEv
 466   Symbol added: _ZNKSt3__17codecvtIDiDu11__mbstate_tE16do_always_noconvEv
 467   Symbol added: _ZNKSt3__17codecvtIDiDu11__mbstate_tE5do_inERS1_PKDuS5_RS5_PDiS7_RS7_
 468   Symbol added: _ZNKSt3__17codecvtIDiDu11__mbstate_tE6do_outERS1_PKDiS5_RS5_PDuS7_RS7_
 469   Symbol added: _ZNKSt3__17codecvtIDiDu11__mbstate_tE9do_lengthERS1_PKDuS5_m
 470   Symbol added: _ZNKSt3__17codecvtIDsDu11__mbstate_tE10do_unshiftERS1_PDuS4_RS4_
 471   Symbol added: _ZNKSt3__17codecvtIDsDu11__mbstate_tE11do_encodingEv
 472   Symbol added: _ZNKSt3__17codecvtIDsDu11__mbstate_tE13do_max_lengthEv
 473   Symbol added: _ZNKSt3__17codecvtIDsDu11__mbstate_tE16do_always_noconvEv
 474   Symbol added: _ZNKSt3__17codecvtIDsDu11__mbstate_tE5do_inERS1_PKDuS5_RS5_PDsS7_RS7_
 475   Symbol added: _ZNKSt3__17codecvtIDsDu11__mbstate_tE6do_outERS1_PKDsS5_RS5_PDuS7_RS7_
 476   Symbol added: _ZNKSt3__17codecvtIDsDu11__mbstate_tE9do_lengthERS1_PKDuS5_m
 477   Symbol added: _ZNSt3__114codecvt_bynameIDiDu11__mbstate_tED0Ev
 478   Symbol added: _ZNSt3__114codecvt_bynameIDiDu11__mbstate_tED1Ev
 479   Symbol added: _ZNSt3__114codecvt_bynameIDiDu11__mbstate_tED2Ev
 480   Symbol added: _ZNSt3__114codecvt_bynameIDsDu11__mbstate_tED0Ev
 481   Symbol added: _ZNSt3__114codecvt_bynameIDsDu11__mbstate_tED1Ev
 482   Symbol added: _ZNSt3__114codecvt_bynameIDsDu11__mbstate_tED2Ev
 483   Symbol added: _ZNSt3__17codecvtIDiDu11__mbstate_tE2idE
 484   Symbol added: _ZNSt3__17codecvtIDiDu11__mbstate_tED0Ev
 485   Symbol added: _ZNSt3__17codecvtIDiDu11__mbstate_tED1Ev
 486   Symbol added: _ZNSt3__17codecvtIDiDu11__mbstate_tED2Ev
 487   Symbol added: _ZNSt3__17codecvtIDsDu11__mbstate_tE2idE
 488   Symbol added: _ZNSt3__17codecvtIDsDu11__mbstate_tED0Ev
 489   Symbol added: _ZNSt3__17codecvtIDsDu11__mbstate_tED1Ev
 490   Symbol added: _ZNSt3__17codecvtIDsDu11__mbstate_tED2Ev
 491   Symbol added: _ZTINSt3__114codecvt_bynameIDiDu11__mbstate_tEE
 492   Symbol added: _ZTINSt3__114codecvt_bynameIDsDu11__mbstate_tEE
 493   Symbol added: _ZTINSt3__17codecvtIDiDu11__mbstate_tEE
 494   Symbol added: _ZTINSt3__17codecvtIDsDu11__mbstate_tEE
 495   Symbol added: _ZTSNSt3__17codecvtIDiDu11__mbstate_tEE
 496   Symbol added: _ZTSNSt3__17codecvtIDsDu11__mbstate_tEE
 497   Symbol added: _ZTVNSt3__114codecvt_bynameIDiDu11__mbstate_tEE
 498   Symbol added: _ZTVNSt3__114codecvt_bynameIDsDu11__mbstate_tEE
 499   Symbol added: _ZTVNSt3__17codecvtIDiDu11__mbstate_tEE
 500   Symbol added: _ZTVNSt3__17codecvtIDsDu11__mbstate_tEE
 501
 502   <arch>-unknown-linux-gnu
 503   ------------------------
 504   Symbol added: _ZTSNSt3__114codecvt_bynameIDiDu11__mbstate_tEE
 505   Symbol added: _ZTSNSt3__114codecvt_bynameIDsDu11__mbstate_tEE
 506
 507 * 997d41cdec53 - [libc++] Instantiate additional <iostream> members in the dylib
 508
 509   This commit added new explicit instantiations for classes in <iostream> in
 510   the library. This was done after noticing that many programs that used streams
 511   ended up containing weak definitions of these classes, which has a negative
 512   impact on both code size and load times. This change is not an ABI break,
 513   since we are just adding additional symbols.
 514
 515   All platforms
 516   -------------
 517   Symbol added: _ZNKSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEE3strEv
 518   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE11__read_modeEv
 519   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE12__write_modeEv
 520   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE4openEPKcj
 521   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE4swapERS3_
 522   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE4syncEv
 523   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE5closeEv
 524   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE5imbueERKNS_6localeE
 525   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE6setbufEPcl
 526   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE7seekoffExNS_8ios_base7seekdirEj
 527   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE7seekposENS_4fposI11__mbstate_tEEj
 528   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE8overflowEi
 529   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE9pbackfailEi
 530   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE9underflowEv
 531   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEEC1EOS3_
 532   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEEC1Ev
 533   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEEC2EOS3_
 534   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEEC2Ev
 535   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEED0Ev
 536   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEED1Ev
 537   Symbol added: _ZNSt3__113basic_filebufIcNS_11char_traitsIcEEED2Ev
 538   Symbol added: _ZNSt3__114basic_ifstreamIcNS_11char_traitsIcEEE4openEPKcj
 539   Symbol added: _ZNSt3__114basic_ifstreamIcNS_11char_traitsIcEEE4openERKNS_12basic_stringIcS2_NS_9allocatorIcEEEEj
 540   Symbol added: _ZNSt3__114basic_ofstreamIcNS_11char_traitsIcEEE4openEPKcj
 541   Symbol added: _ZNSt3__114basic_ofstreamIcNS_11char_traitsIcEEE4openERKNS_12basic_stringIcS2_NS_9allocatorIcEEEEj
 542   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEE3strERKNS_12basic_stringIcS2_S4_EE
 543   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEE4swapERS5_
 544   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEE7seekoffExNS_8ios_base7seekdirEj
 545   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEE8overflowEi
 546   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEE9pbackfailEi
 547   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEE9underflowEv
 548   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEEC1EOS5_
 549   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEEC2EOS5_
 550   Symbol added: _ZNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_
 551   Symbol added: _ZNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_
 552   Symbol added: _ZNSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_
 553   Symbol added: _ZNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_
 554   Symbol added: _ZTCNSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE0_NS_13basic_istreamIcS2_EE
 555   Symbol added: _ZTCNSt3__114basic_ofstreamIcNS_11char_traitsIcEEEE0_NS_13basic_ostreamIcS2_EE
 556   Symbol added: _ZTCNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE0_NS_13basic_istreamIcS2_EE
 557   Symbol added: _ZTCNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE0_NS_14basic_iostreamIcS2_EE
 558   Symbol added: _ZTCNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE16_NS_13basic_ostreamIcS2_EE
 559   Symbol added: _ZTCNSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE0_NS_13basic_istreamIcS2_EE
 560   Symbol added: _ZTCNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE0_NS_13basic_ostreamIcS2_EE
 561   Symbol added: _ZTINSt3__113basic_filebufIcNS_11char_traitsIcEEEE
 562   Symbol added: _ZTINSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE
 563   Symbol added: _ZTINSt3__114basic_ofstreamIcNS_11char_traitsIcEEEE
 564   Symbol added: _ZTINSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 565   Symbol added: _ZTINSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 566   Symbol added: _ZTINSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 567   Symbol added: _ZTINSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 568   Symbol added: _ZTSNSt3__113basic_filebufIcNS_11char_traitsIcEEEE
 569   Symbol added: _ZTSNSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE
 570   Symbol added: _ZTSNSt3__114basic_ofstreamIcNS_11char_traitsIcEEEE
 571   Symbol added: _ZTSNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 572   Symbol added: _ZTSNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 573   Symbol added: _ZTSNSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 574   Symbol added: _ZTSNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 575   Symbol added: _ZTTNSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE
 576   Symbol added: _ZTTNSt3__114basic_ofstreamIcNS_11char_traitsIcEEEE
 577   Symbol added: _ZTTNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 578   Symbol added: _ZTTNSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 579   Symbol added: _ZTTNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 580   Symbol added: _ZTVNSt3__113basic_filebufIcNS_11char_traitsIcEEEE
 581   Symbol added: _ZTVNSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE
 582   Symbol added: _ZTVNSt3__114basic_ofstreamIcNS_11char_traitsIcEEEE
 583   Symbol added: _ZTVNSt3__115basic_stringbufIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 584   Symbol added: _ZTVNSt3__118basic_stringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 585   Symbol added: _ZTVNSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 586   Symbol added: _ZTVNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEE
 587
 588 * 9b40ee8eb0c1 - [libc++] Define new/delete in libc++abi only by default
 589
 590   By default, libc++ does not include the definition for new and delete anymore.
 591   Those were previously defined in both libc++ and libc++abi, which was an
 592   ODR violation.
 593
 594   <arch>-apple-darwin
 595   -------------------------
 596   The following symbols are now re-exported from libc++abi instead of exported
 597   by libc++ directly (this should not be an ABI break):
 598
 599   Symbol moved: __ZdaPv
 600   Symbol moved: __ZdaPvm
 601   Symbol moved: __ZdaPvmSt11align_val_t
 602   Symbol moved: __ZdaPvRKSt9nothrow_t
 603   Symbol moved: __ZdaPvSt11align_val_t
 604   Symbol moved: __ZdaPvSt11align_val_tRKSt9nothrow_t
 605   Symbol moved: __ZdlPv
 606   Symbol moved: __ZdlPvm
 607   Symbol moved: __ZdlPvmSt11align_val_t
 608   Symbol moved: __ZdlPvRKSt9nothrow_t
 609   Symbol moved: __ZdlPvSt11align_val_t
 610   Symbol moved: __ZdlPvSt11align_val_tRKSt9nothrow_t
 611   Symbol moved: __Znam
 612   Symbol moved: __ZnamRKSt9nothrow_t
 613   Symbol moved: __ZnamSt11align_val_t
 614   Symbol moved: __ZnamSt11align_val_tRKSt9nothrow_t
 615   Symbol moved: __Znwm
 616   Symbol moved: __ZnwmRKSt9nothrow_t
 617   Symbol moved: __ZnwmSt11align_val_t
 618   Symbol moved: __ZnwmSt11align_val_tRKSt9nothrow_t
 619
 620   <arch>-unknown-linux-gnu
 621   ------------------------
 622   The following symbols were moved to libc++abi, but are NOT being re-exported
 623   by libc++. This constitutes an ABI break if one links against libc++ but
 624   not libc++abi.
 625
 626   Symbol moved: _ZdaPv
 627   Symbol moved: _ZdaPvm
 628   Symbol moved: _ZdaPvmSt11align_val_t
 629   Symbol moved: _ZdaPvRKSt9nothrow_t
 630   Symbol moved: _ZdaPvSt11align_val_t
 631   Symbol moved: _ZdaPvSt11align_val_tRKSt9nothrow_t
 632   Symbol moved: _ZdlPv
 633   Symbol moved: _ZdlPvm
 634   Symbol moved: _ZdlPvmSt11align_val_t
 635   Symbol moved: _ZdlPvRKSt9nothrow_t
 636   Symbol moved: _ZdlPvSt11align_val_t
 637   Symbol moved: _ZdlPvSt11align_val_tRKSt9nothrow_t
 638   Symbol moved: _Znam
 639   Symbol moved: _ZnamRKSt9nothrow_t
 640   Symbol moved: _ZnamSt11align_val_t
 641   Symbol moved: _ZnamSt11align_val_tRKSt9nothrow_t
 642   Symbol moved: _Znwm
 643   Symbol moved: _ZnwmRKSt9nothrow_t
 644   Symbol moved: _ZnwmSt11align_val_t
 645   Symbol moved: _ZnwmSt11align_val_tRKSt9nothrow_t
 646
 647 * 4f13b9992971 - [libc++] Simplify how we re-export symbols from libc++abi
 648
 649   We re-export some symbols that were exported from libc++abi but not from
 650   libc++. Exporting new symbols is not an ABI break.
 651
 652   <arch>-apple-darwin
 653   -------------------
 654   Symbol added: ___cxa_allocate_dependent_exception
 655   Symbol added: ___cxa_free_dependent_exception
 656
 657 ------------
 658 Version 11.0
 659 ------------
 660
 661 * 54fa9ecd3088 - [libc++] Implementation of C++20's P1135R6 for libcxx
 662
 663   libc++ now implements P1135R6 (The C++20 Synchronization Library), which
 664   adds a few symbols to the dylib. This is backwards-compatible since we're
 665   just adding new symbols.
 666
 667   All platforms
 668   -------------
 669   Symbol added: __ZNSt3__120__libcpp_atomic_waitEPVKNS_17__cxx_atomic_implIxNS_22__cxx_atomic_base_implIxEEEEx
 670   Symbol added: __ZNSt3__120__libcpp_atomic_waitEPVKvx
 671   Symbol added: __ZNSt3__123__cxx_atomic_notify_allEPVKNS_17__cxx_atomic_implIxNS_22__cxx_atomic_base_implIxEEEE
 672   Symbol added: __ZNSt3__123__cxx_atomic_notify_allEPVKv
 673   Symbol added: __ZNSt3__123__cxx_atomic_notify_oneEPVKNS_17__cxx_atomic_implIxNS_22__cxx_atomic_base_implIxEEEE
 674   Symbol added: __ZNSt3__123__cxx_atomic_notify_oneEPVKv
 675   Symbol added: __ZNSt3__123__libcpp_atomic_monitorEPVKNS_17__cxx_atomic_implIxNS_22__cxx_atomic_base_implIxEEEE
 676   Symbol added: __ZNSt3__123__libcpp_atomic_monitorEPVKv
 677   Symbol added: __ZNSt3__131__arrive_barrier_algorithm_baseEPNS_24__barrier_algorithm_baseEh
 678   Symbol added: __ZNSt3__132__destroy_barrier_algorithm_baseEPNS_24__barrier_algorithm_baseE
 679   Symbol added: __ZNSt3__134__construct_barrier_algorithm_baseERl
 680
 681 -----------
 682 Version 9.0
 683 -----------
 684
 685 * r358690 - Re-rexport missing symbols from libc++abi
 686
 687   libc++ now re-exports `__cxa_throw_bad_array_new_length` and `__cxa_uncaught_exceptions`,
 688   both of which are provided by libc++abi. This is not an ABI break because
 689   we're just adding symbols. Also, this does mean that libc++ can't be linked
 690   against an older version of libc++abi that doesn't provide those symbols,
 691   however doing so is not supported anyway.
 692
 693   <arch>-apple-darwin
 694   -------------------
 695   Symbol added: ___cxa_throw_bad_array_new_length
 696   Symbol added: ___cxa_uncaught_exceptions
 697
 698 * r356518 - Integrate <filesystem> support into the shared library
 699
 700   This patch introduces support for <filesystem> into the shared library,
 701   instead of requiring users to manually link against a static archive. As
 702   such, new symbols required to implement <filesystem> are exported from
 703   the shared library.
 704
 705   All platforms
 706   -------------
 707   Symbol added: _ZNKSt3__14__fs10filesystem18directory_iterator13__dereferenceEv
 708   Symbol added: _ZNKSt3__14__fs10filesystem28recursive_directory_iterator13__dereferenceEv
 709   Symbol added: _ZNKSt3__14__fs10filesystem28recursive_directory_iterator5depthEv
 710   Symbol added: _ZNKSt3__14__fs10filesystem28recursive_directory_iterator7optionsEv
 711   Symbol added: _ZNKSt3__14__fs10filesystem4path10__filenameEv
 712   Symbol added: _ZNKSt3__14__fs10filesystem4path11__extensionEv
 713   Symbol added: _ZNKSt3__14__fs10filesystem4path11__root_nameEv
 714   Symbol added: _ZNKSt3__14__fs10filesystem4path13__parent_pathEv
 715   Symbol added: _ZNKSt3__14__fs10filesystem4path15__relative_pathEv
 716   Symbol added: _ZNKSt3__14__fs10filesystem4path15__root_path_rawEv
 717   Symbol added: _ZNKSt3__14__fs10filesystem4path16__root_directoryEv
 718   Symbol added: _ZNKSt3__14__fs10filesystem4path16lexically_normalEv
 719   Symbol added: _ZNKSt3__14__fs10filesystem4path18lexically_relativeERKS2_
 720   Symbol added: _ZNKSt3__14__fs10filesystem4path3endEv
 721   Symbol added: _ZNKSt3__14__fs10filesystem4path5beginEv
 722   Symbol added: _ZNKSt3__14__fs10filesystem4path6__stemEv
 723   Symbol added: _ZNKSt3__14__fs10filesystem4path9__compareENS_17basic_string_viewIcNS_11char_traitsIcEEEE
 724   Symbol added: _ZNSt3__14__fs10filesystem10__absoluteERKNS1_4pathEPNS_10error_codeE
 725   Symbol added: _ZNSt3__14__fs10filesystem10hash_valueERKNS1_4pathE
 726   Symbol added: _ZNSt3__14__fs10filesystem11__canonicalERKNS1_4pathEPNS_10error_codeE
 727   Symbol added: _ZNSt3__14__fs10filesystem11__copy_fileERKNS1_4pathES4_NS1_12copy_optionsEPNS_10error_codeE
 728   Symbol added: _ZNSt3__14__fs10filesystem11__file_sizeERKNS1_4pathEPNS_10error_codeE
 729   Symbol added: _ZNSt3__14__fs10filesystem12__equivalentERKNS1_4pathES4_PNS_10error_codeE
 730   Symbol added: _ZNSt3__14__fs10filesystem12__remove_allERKNS1_4pathEPNS_10error_codeE
 731   Symbol added: _ZNSt3__14__fs10filesystem13__fs_is_emptyERKNS1_4pathEPNS_10error_codeE
 732   Symbol added: _ZNSt3__14__fs10filesystem13__permissionsERKNS1_4pathENS1_5permsENS1_12perm_optionsEPNS_10error_codeE
 733   Symbol added: _ZNSt3__14__fs10filesystem13__resize_fileERKNS1_4pathEmPNS_10error_codeE
 734   Symbol added: _ZNSt3__14__fs10filesystem14__copy_symlinkERKNS1_4pathES4_PNS_10error_codeE
 735   Symbol added: _ZNSt3__14__fs10filesystem14__current_pathEPNS_10error_codeE
 736   Symbol added: _ZNSt3__14__fs10filesystem14__current_pathERKNS1_4pathEPNS_10error_codeE
 737   Symbol added: _ZNSt3__14__fs10filesystem14__read_symlinkERKNS1_4pathEPNS_10error_codeE
 738   Symbol added: _ZNSt3__14__fs10filesystem15directory_entry12__do_refreshEv
 739   Symbol added: _ZNSt3__14__fs10filesystem16__create_symlinkERKNS1_4pathES4_PNS_10error_codeE
 740   Symbol added: _ZNSt3__14__fs10filesystem16__symlink_statusERKNS1_4pathEPNS_10error_codeE
 741   Symbol added: _ZNSt3__14__fs10filesystem16_FilesystemClock3nowEv
 742   Symbol added: _ZNSt3__14__fs10filesystem16_FilesystemClock9is_steadyE
 743   Symbol added: _ZNSt3__14__fs10filesystem16filesystem_error13__create_whatEi
 744   Symbol added: _ZNSt3__14__fs10filesystem16filesystem_errorD0Ev
 745   Symbol added: _ZNSt3__14__fs10filesystem16filesystem_errorD1Ev
 746   Symbol added: _ZNSt3__14__fs10filesystem16filesystem_errorD2Ev
 747   Symbol added: _ZNSt3__14__fs10filesystem17__hard_link_countERKNS1_4pathEPNS_10error_codeE
 748   Symbol added: _ZNSt3__14__fs10filesystem17__last_write_timeERKNS1_4pathENS_6chrono10time_pointINS1_16_FilesystemClockENS5_8durationInNS_5ratioILl1ELl1000000000EEEEEEEPNS_10error_codeE
 749   Symbol added: _ZNSt3__14__fs10filesystem17__last_write_timeERKNS1_4pathEPNS_10error_codeE
 750   Symbol added: _ZNSt3__14__fs10filesystem18__create_directoryERKNS1_4pathEPNS_10error_codeE
 751   Symbol added: _ZNSt3__14__fs10filesystem18__create_directoryERKNS1_4pathES4_PNS_10error_codeE
 752   Symbol added: _ZNSt3__14__fs10filesystem18__create_hard_linkERKNS1_4pathES4_PNS_10error_codeE
 753   Symbol added: _ZNSt3__14__fs10filesystem18__weakly_canonicalERKNS1_4pathEPNS_10error_codeE
 754   Symbol added: _ZNSt3__14__fs10filesystem18directory_iterator11__incrementEPNS_10error_codeE
 755   Symbol added: _ZNSt3__14__fs10filesystem18directory_iteratorC1ERKNS1_4pathEPNS_10error_codeENS1_17directory_optionsE
 756   Symbol added: _ZNSt3__14__fs10filesystem18directory_iteratorC2ERKNS1_4pathEPNS_10error_codeENS1_17directory_optionsE
 757   Symbol added: _ZNSt3__14__fs10filesystem20__create_directoriesERKNS1_4pathEPNS_10error_codeE
 758   Symbol added: _ZNSt3__14__fs10filesystem21__temp_directory_pathEPNS_10error_codeE
 759   Symbol added: _ZNSt3__14__fs10filesystem26__create_directory_symlinkERKNS1_4pathES4_PNS_10error_codeE
 760   Symbol added: _ZNSt3__14__fs10filesystem28recursive_directory_iterator11__incrementEPNS_10error_codeE
 761   Symbol added: _ZNSt3__14__fs10filesystem28recursive_directory_iterator15__try_recursionEPNS_10error_codeE
 762   Symbol added: _ZNSt3__14__fs10filesystem28recursive_directory_iterator5__popEPNS_10error_codeE
 763   Symbol added: _ZNSt3__14__fs10filesystem28recursive_directory_iterator9__advanceEPNS_10error_codeE
 764   Symbol added: _ZNSt3__14__fs10filesystem28recursive_directory_iteratorC1ERKNS1_4pathENS1_17directory_optionsEPNS_10error_codeE
 765   Symbol added: _ZNSt3__14__fs10filesystem28recursive_directory_iteratorC2ERKNS1_4pathENS1_17directory_optionsEPNS_10error_codeE
 766   Symbol added: _ZNSt3__14__fs10filesystem4path17replace_extensionERKS2_
 767   Symbol added: _ZNSt3__14__fs10filesystem4path19preferred_separatorE
 768   Symbol added: _ZNSt3__14__fs10filesystem4path8iterator11__decrementEv
 769   Symbol added: _ZNSt3__14__fs10filesystem4path8iterator11__incrementEv
 770   Symbol added: _ZNSt3__14__fs10filesystem6__copyERKNS1_4pathES4_NS1_12copy_optionsEPNS_10error_codeE
 771   Symbol added: _ZNSt3__14__fs10filesystem7__spaceERKNS1_4pathEPNS_10error_codeE
 772   Symbol added: _ZNSt3__14__fs10filesystem8__removeERKNS1_4pathEPNS_10error_codeE
 773   Symbol added: _ZNSt3__14__fs10filesystem8__renameERKNS1_4pathES4_PNS_10error_codeE
 774   Symbol added: _ZNSt3__14__fs10filesystem8__statusERKNS1_4pathEPNS_10error_codeE
 775   Symbol added: _ZTINSt3__14__fs10filesystem16filesystem_errorE
 776   Symbol added: _ZTSNSt3__14__fs10filesystem16filesystem_errorE
 777   Symbol added: _ZTVNSt3__14__fs10filesystem16filesystem_errorE
 778
 779 * r356417 - Remove exception throwing debug mode handler support.
 780
 781   The reason libc++ implemented a throwing debug mode handler was for ease of testing. Specifically,
 782   I thought that if a debug violation aborted, we could only test one violation per file. This made
 783   it impossible to test debug mode. Which throwing behavior we could test more!
 784
 785   However, the throwing approach didn't work either, since there are debug violations underneath noexcept
 786   functions. This lead to the introduction of `_NOEXCEPT_DEBUG`, which was only noexcept when debug
 787   mode was off.
 788
 789   Having thought more and having grown wiser, `_NOEXCEPT_DEBUG` was a horrible decision. It was
 790   viral, it didn't cover all the cases it needed to, and it was observable to the user -- at worst
 791   changing the behavior of their program.
 792
 793   This patch removes the throwing debug handler, and rewrites the debug tests using 'fork-ing' style
 794   death tests.
 795
 796   All Platforms (ignoring versioning namespaces)
 797   ----------------------------------------------
 798   Symbol added: _ZNKSt3__119__libcpp_debug_info4whatEv
 799   Symbol removed: _ZNKSt3__124__libcpp_debug_exception4whatEv
 800   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionC1ERKNS_19__libcpp_debug_infoE
 801   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionC1ERKS0_
 802   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionC1Ev
 803   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionC2ERKNS_19__libcpp_debug_infoE
 804   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionC2ERKS0_
 805   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionC2Ev
 806   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionD0Ev
 807   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionD1Ev
 808   Symbol removed: _ZNSt3__124__libcpp_debug_exceptionD2Ev
 809   Symbol removed: _ZNSt3__129__libcpp_throw_debug_functionERKNS_19__libcpp_debug_infoE
 810   Symbol removed: _ZTINSt3__124__libcpp_debug_exceptionE
 811   Symbol removed: _ZTSNSt3__124__libcpp_debug_exceptionE
 812   Symbol removed: _ZTVNSt3__124__libcpp_debug_exceptionE
 813
 814   <arch>-apple-darwin
 815   -------------------
 816   Symbol added: __ZNSt3__111__libcpp_db10__insert_cEPvPFPNS_8__c_nodeES1_S1_S3_E
 817   Symbol removed: __ZNSt3__111__libcpp_db10__insert_cEPv
 818
 819 * r355367 - Fix -fsanitize=vptr badness in <__debug>
 820
 821   This patch fixes a lifetime bug when inserting a new container into the debug database. It is
 822   diagnosed by UBSAN when debug mode is enabled. This patch corrects how nodes are constructed
 823   during insertion.
 824
 825   The fix requires unconditionally breaking the debug mode ABI. Users should not expect ABI
 826   stability from debug mode.
 827
 828   All platforms
 829   -------------
 830   Symbol added: _ZNSt3__111__libcpp_db10__insert_cEPvPFPNS_8__c_nodeES1_S1_S3_E
 831   Symbol removed: _ZNSt3__111__libcpp_db10__insert_cEPv
 832
 833 -----------
 834 Version 8.0
 835 -----------
 836
 837 * r347903 - Remove std::bad_array_length
 838
 839   The change removes the definition of std::bad_array_length (which never made
 840   it into the standard) from the headers and the dylib. This is technically an
 841   ABI break because the symbols are shipped starting with mac OSX 10.13, however
 842   users couldn't be relying on the functionality because it is marked as being
 843   unavailable using Clang's availability attribute.
 844
 845   <arch>-apple-darwin
 846   -------------------
 847   Symbol removed: __ZNKSt16bad_array_length4whatEv
 848   Symbol removed: __ZNKSt16bad_array_length4whatEv
 849   Symbol removed: __ZNSt16bad_array_lengthC1Ev
 850   Symbol removed: __ZNSt16bad_array_lengthC1Ev
 851   Symbol removed: __ZNSt16bad_array_lengthC2Ev
 852   Symbol removed: __ZNSt16bad_array_lengthC2Ev
 853   Symbol removed: __ZNSt16bad_array_lengthD0Ev
 854   Symbol removed: __ZNSt16bad_array_lengthD0Ev
 855   Symbol removed: __ZNSt16bad_array_lengthD1Ev
 856   Symbol removed: __ZNSt16bad_array_lengthD1Ev
 857   Symbol removed: __ZNSt16bad_array_lengthD2Ev
 858   Symbol removed: __ZNSt16bad_array_lengthD2Ev
 859   Symbol removed: __ZTISt16bad_array_length
 860   Symbol removed: __ZTISt16bad_array_length
 861   Symbol removed: __ZTSSt16bad_array_length
 862   Symbol removed: __ZTSSt16bad_array_length
 863   Symbol removed: __ZTVSt16bad_array_length
 864   Symbol removed: __ZTVSt16bad_array_length
 865
 866 * r347395 - Making libc++ build under -fvisibility=hidden on Linux
 867
 868   The change marks several function templates as hidden. This removes symbols
 869   from the shared library, but this is not an ABI break because it's impossible
 870   for programs linking against libc++.so to actually depend on that symbol.
 871   The reason is that the symbol is exported from the shared library through
 872   an implicit instantiation present in the shared object itself only. Furthermore,
 873   if a user's shared object was implicitly instantiating one of these functions,
 874   marking that symbol as hidden would not be an ABI break for them because none
 875   of their users could actually be using the symbol in their dylib (because
 876   it's an implicit instantiation).
 877
 878   x86_64-linux-gnu
 879   ----------------
 880   Symbol removed: _ZNSt3__125__num_get_signed_integralIlEET_PKcS3_Rji
 881   Symbol removed: _ZNSt3__125__num_get_signed_integralIxEET_PKcS3_Rji
 882   Symbol removed: _ZNSt3__127__num_get_unsigned_integralIjEET_PKcS3_Rji
 883   Symbol removed: _ZNSt3__127__num_get_unsigned_integralImEET_PKcS3_Rji
 884   Symbol removed: _ZNSt3__127__num_get_unsigned_integralItEET_PKcS3_Rji
 885   Symbol removed: _ZNSt3__127__num_get_unsigned_integralIyEET_PKcS3_Rji
 886   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIaaEEPaEEjT0_S5_S5_S5_S5_T_
 887   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIccEEPcEEjT0_S5_S5_S5_S5_T_
 888   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIddEEPdEEjT0_S5_S5_S5_S5_T_
 889   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIffEEPfEEjT0_S5_S5_S5_S5_T_
 890   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIhhEEPhEEjT0_S5_S5_S5_S5_T_
 891   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIiiEEPiEEjT0_S5_S5_S5_S5_T_
 892   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIjjEEPjEEjT0_S5_S5_S5_S5_T_
 893   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIllEEPlEEjT0_S5_S5_S5_S5_T_
 894   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessImmEEPmEEjT0_S5_S5_S5_S5_T_
 895   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIssEEPsEEjT0_S5_S5_S5_S5_T_
 896   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIttEEPtEEjT0_S5_S5_S5_S5_T_
 897   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIwwEEPwEEjT0_S5_S5_S5_S5_T_
 898   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIxxEEPxEEjT0_S5_S5_S5_S5_T_
 899   Symbol removed: _ZNSt3__17__sort5IRNS_6__lessIyyEEPyEEjT0_S5_S5_S5_S5_T_
 900   Symbol removed: _ZNSt3__1plIcNS_11char_traitsIcEENS_9allocatorIcEEEENS_12basic_stringIT_T0_T1_EERKS9_PKS6_
 901   Symbol removed: _ZSt18make_exception_ptrINSt3__112future_errorEESt13exception_ptrT_
 902
 903 * r345260 - Making libc++ build under -fvisibility=hidden on Mac OS
 904
 905   The change marks __thread_specific_ptr<__thread_struct>::__at_thread_exit(void*)
 906   with hidden visibility. This removes a symbol from the shared libraries,
 907   however this is not an ABI break because it's impossible for programs linking
 908   against libc++.dylib to actually depend on that symbol. The reason is that
 909   the symbol is exported from the shared library through an implicit
 910   instantiation present in the dylib itself only. Furthermore, if a user's
 911   dylib was implicitly instantiating __thread_specific_ptr<T>::__at_thread_exit
 912   (because it's defined in the headers), marking that symbol as hidden would
 913   not be an ABI break for them because none of their users could actually be
 914   using the symbol in their dylib (because it's an implicit instantiation).
 915
 916   This change also marks __start_std_streams as hidden -- this variable is
 917   only required to initialize the streams, and nobody should depend on it
 918   from outside the dylib.
 919
 920   x86_64-linux-gnu
 921   ----------------
 922   Symbol removed: _ZNSt3__121__thread_specific_ptrINS_15__thread_structEE16__at_thread_exitEPv
 923   Symbol removed: _ZNSt3__119__start_std_streamsE
 924
 925   <arch>-apple-darwin
 926   -------------------
 927   Symbol removed: __ZNSt3__221__thread_specific_ptrINS_15__thread_structEE16__at_thread_exitEPv
 928   Symbol removed: __ZNSt3__119__start_std_streamsE
 929
 930 -----------
 931 Version 7.0
 932 -----------
 933
 934 * r338479 - Elementary string conversions for integral types
 935
 936   The change emits __u64toa and __u32toa under std::__1::__itoa.
 937
 938   x86_64-linux-gnu
 939   ----------------
 940   Symbol added: _ZNSt3__16__itoa8__u64toaEmPc
 941   Symbol added: _ZNSt3__16__itoa8__u32toaEjPc
 942
 943   <arch>-apple-darwin
 944   -------------------
 945   Symbol added: __ZNSt3__16__itoa8__u64toaEyPc
 946   Symbol added: __ZNSt3__16__itoa8__u32toaEjPc
 947
 948
 949 * r333467 - Fix embarrasing typo in uncaught_exceptions.
 950
 951   This bug caused __uncaught_exception to be ODR used instead of
 952   __uncaught_exceptions. This change is non-ABI breaking because the symbols
 953   for std::uncaught_exception and std::uncaught_exceptions haven't changed,
 954   and because users shouldn't be depending directly on libc++ exporting
 955   __uncaught_exception/__uncaught_exceptions.
 956
 957   All Platforms
 958   ----------------
 959   Symbol removed: __cxa_uncaught_exception
 960   Symbol added: __cxa_uncaught_exceptions
 961
 962 -----------
 963 Version 5.0
 964 -----------
 965
 966 * r313500 - Fix undefined "___cxa_deleted_virtual" symbol in macosx
 967
 968   x86_64-linux-gnu
 969   ----------------
 970   No changes
 971
 972   <arch>-apple-darwin
 973   -------------------
 974   Symbol added: ___cxa_deleted_virtual
 975
 976 * r296729 - Remove std::num_get template methods which should be inline
 977
 978   These functions should never have had visible definitions in the dylib but
 979   since they were previously not specified with 'inline' they accidentally
 980   got emitted. This change is non-ABI breaking because every "linkage unit"
 981   must contain its own definition.
 982
 983   x86_64-linux-gnu
 984   ----------------
 985   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE15__do_get_signedIlEES4_S4_S4_RNS_8ios_baseERjRT_
 986   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE15__do_get_signedIxEES4_S4_S4_RNS_8ios_baseERjRT_
 987   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE17__do_get_unsignedIjEES4_S4_S4_RNS_8ios_baseERjRT_
 988   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE17__do_get_unsignedImEES4_S4_S4_RNS_8ios_baseERjRT_
 989   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE17__do_get_unsignedItEES4_S4_S4_RNS_8ios_baseERjRT_
 990   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE17__do_get_unsignedIyEES4_S4_S4_RNS_8ios_baseERjRT_
 991   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE23__do_get_floating_pointIdEES4_S4_S4_RNS_8ios_baseERjRT_
 992   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE23__do_get_floating_pointIeEES4_S4_S4_RNS_8ios_baseERjRT_
 993   Symbol removed: _ZNKSt3__17num_getIcNS_19istreambuf_iteratorIcNS_11char_traitsIcEEEEE23__do_get_floating_pointIfEES4_S4_S4_RNS_8ios_baseERjRT_
 994   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE15__do_get_signedIlEES4_S4_S4_RNS_8ios_baseERjRT_
 995   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE15__do_get_signedIxEES4_S4_S4_RNS_8ios_baseERjRT_
 996   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE17__do_get_unsignedIjEES4_S4_S4_RNS_8ios_baseERjRT_
 997   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE17__do_get_unsignedImEES4_S4_S4_RNS_8ios_baseERjRT_
 998   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE17__do_get_unsignedItEES4_S4_S4_RNS_8ios_baseERjRT_
 999   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE17__do_get_unsignedIyEES4_S4_S4_RNS_8ios_baseERjRT_
1000   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE23__do_get_floating_pointIdEES4_S4_S4_RNS_8ios_baseERjRT_
1001   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE23__do_get_floating_pointIeEES4_S4_S4_RNS_8ios_baseERjRT_
1002   Symbol removed: _ZNKSt3__17num_getIwNS_19istreambuf_iteratorIwNS_11char_traitsIwEEEEE23__do_get_floating_pointIfEES4_S4_S4_RNS_8ios_baseERjRT_
1003
1004   <arch>-apple-darwin
1005   -------------------
1006   No changes
1007
1008 -----------
1009 Version 4.0
1010 -----------
1011
1012 * r290651 - Add _LIBCPP_ASSERT debug handling functions
1013
1014   All Platforms
1015   -------------
1016   Symbol added: _ZNSt3__124__libcpp_debug_exceptionC2ERKNS_19__libcpp_debug_infoE
1017   Symbol added: _ZNSt3__124__libcpp_debug_exceptionD1Ev
1018   Symbol added: _ZTINSt3__124__libcpp_debug_exceptionE
1019   Symbol added: _ZNSt3__129__libcpp_throw_debug_functionERKNS_19__libcpp_debug_infoE
1020   Symbol added: _ZNSt3__124__libcpp_debug_exceptionD2Ev
1021   Symbol added: _ZNSt3__129__libcpp_abort_debug_functionERKNS_19__libcpp_debug_infoE
1022   Symbol added: _ZNSt3__124__libcpp_debug_exceptionC2ERKS0_
1023   Symbol added: _ZNSt3__124__libcpp_debug_exceptionC1Ev
1024   Symbol added: _ZNSt3__124__libcpp_debug_exceptionC1ERKNS_19__libcpp_debug_infoE
1025   Symbol added: _ZNSt3__124__libcpp_debug_exceptionC2Ev
1026   Symbol added: _ZTSNSt3__124__libcpp_debug_exceptionE
1027   Symbol added: _ZNSt3__123__libcpp_debug_functionE
1028   Symbol added: _ZNKSt3__124__libcpp_debug_exception4whatEv
1029   Symbol added: _ZNSt3__124__libcpp_debug_exceptionC1ERKS0_
1030   Symbol added: _ZNSt3__124__libcpp_debug_exceptionD0Ev
1031   Symbol added: _ZTVNSt3__124__libcpp_debug_exceptionE
1032   Symbol added: _ZNSt3__127__libcpp_set_debug_functionEPFvRKNS_19__libcpp_debug_infoEE
1033
1034 * r288547 - Implement C++17 <variant>
1035
1036   All Platforms
1037   -------------
1038   Symbol added: _ZTVSt18bad_variant_access
1039   Symbol added: _ZTISt18bad_variant_access
1040   Symbol added: _ZTSSt18bad_variant_access
1041   Symbol added: _ZNKSt18bad_variant_access4whatEv
1042
1043 * r285537 - Remove std::string::append template methods which should be inline
1044
1045   These functions should never have had visible definitions in the dylib but
1046   since they were previously not specified with 'inline' they accidentally
1047   got emitted. This change is non-ABI breaking because every "linkage unit"
1048   must contain its own definition.
1049
1050   x86_64-linux-gnu
1051   ----------------
1052   Symbol removed: _ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6appendIPcEENS_9enable_ifIXaasr21__is_forward_iteratorIT_EE5valuesr38__libcpp_string_gets_noexcept_iteratorIS9_EE5valueERS5_E4typeES9_S9_
1053   Symbol removed: _ZNSt3__112basic_stringIwNS_11char_traitsIwEENS_9allocatorIwEEE6appendIPwEENS_9enable_ifIXaasr21__is_forward_iteratorIT_EE5valuesr38__libcpp_string_gets_noexcept_iteratorIS9_EE5valueERS5_E4typeES9_S9_
1054
1055   <arch>-apple-darwin
1056   -------------------
1057   No changes
1058
1059 * r285101 - Add -fvisibility-inlines-hidden when building libc++.
1060
1061   Although this change removes symbols, it should still be non-ABI breaking
1062   since all of the definitions removed are inline functions. For this reason
1063   removing these symbols is safe because every "linkage unit" which uses these
1064   functions will contain their own definition.
1065
1066   x86_64-linux-gnu
1067   ----------------
1068   Symbol removed: _ZNSt12bad_any_castD0Ev
1069   Symbol removed: _ZNSt12experimental15fundamentals_v112bad_any_castD0Ev
1070   Symbol removed: _ZNSt3__114__codecvt_utf8IDiED0Ev
1071   Symbol removed: _ZNSt3__114__codecvt_utf8IDsED0Ev
1072   Symbol removed: _ZNSt3__114__codecvt_utf8IwED0Ev
1073   Symbol removed: _ZNSt3__115__codecvt_utf16IDiLb0EED0Ev
1074   Symbol removed: _ZNSt3__115__codecvt_utf16IDiLb1EED0Ev
1075   Symbol removed: _ZNSt3__115__codecvt_utf16IDsLb0EED0Ev
1076   Symbol removed: _ZNSt3__115__codecvt_utf16IDsLb1EED0Ev
1077   Symbol removed: _ZNSt3__115__codecvt_utf16IwLb0EED0Ev
1078   Symbol removed: _ZNSt3__115__codecvt_utf16IwLb1EED0Ev
1079   Symbol removed: _ZNSt3__117__assoc_sub_stateD0Ev
1080   Symbol removed: _ZNSt3__117__assoc_sub_stateD2Ev
1081   Symbol removed: _ZNSt3__117__libcpp_sscanf_lEPKcP15__locale_structS1_z
1082   Symbol removed: _ZNSt3__119__libcpp_asprintf_lEPPcP15__locale_structPKcz
1083   Symbol removed: _ZNSt3__119__libcpp_snprintf_lEPcmP15__locale_structPKcz
1084   Symbol removed: _ZNSt3__120__codecvt_utf8_utf16IDiED0Ev
1085   Symbol removed: _ZNSt3__120__codecvt_utf8_utf16IDsED0Ev
1086   Symbol removed: _ZNSt3__120__codecvt_utf8_utf16IwED0Ev
1087
1088   <arch>-apple-darwin
1089   -------------------
1090   No Changes - inline symbols are already hidden
1091
1092 * r284206 - Implement C++17 aligned allocation in <new>
1093
1094   x86_64-linux-gnu
1095   ----------------
1096   Symbol added: _ZdaPvSt11align_val_t
1097   Symbol added: _ZdlPvSt11align_val_t
1098   Symbol added: _ZnamSt11align_val_t
1099   Symbol added: _ZdaPvmSt11align_val_t
1100   Symbol added: _ZdlPvmSt11align_val_t
1101   Symbol added: _ZdlPvSt11align_val_tRKSt9nothrow_t
1102   Symbol added: _ZnwmSt11align_val_tRKSt9nothrow_t
1103   Symbol added: _ZnamSt11align_val_tRKSt9nothrow_t
1104   Symbol added: _ZdaPvSt11align_val_tRKSt9nothrow_t
1105   Symbol added: _ZnwmSt11align_val_t
1106
1107 * r283980 - Implement C++17 <optional>
1108
1109   x86_64-linux-gnu
1110   ----------------
1111   Symbol added: _ZTISt19bad_optional_access
1112   Symbol added: _ZNSt19bad_optional_accessD0Ev
1113   Symbol added: _ZNSt19bad_optional_accessD1Ev
1114   Symbol added: _ZNSt19bad_optional_accessD2Ev
1115   Symbol added: _ZTVSt19bad_optional_access
1116   Symbol added: _ZTSSt19bad_optional_access
1117
1118 * r278310 - Implement C++17 <any>
1119
1120   x86_64-linux-gnu
1121   ----------------
1122   Symbol added: _ZNKSt12bad_any_cast4whatEv
1123   Symbol added: _ZNSt12bad_any_castD0Ev
1124   Symbol added: _ZTISt12bad_any_cast
1125   Symbol added: _ZTSSt12bad_any_cast
1126   Symbol added: _ZTVSt12bad_any_cast
1127
1128 * r295398 - Remove basic_string::insert and basic_string::replace template methods which should be inline.
1129
1130   These functions should never have had visible definitions in the dylib but
1131   since they were previously not specified with 'inline' they accidentally
1132   got emitted. This change is non-ABI breaking because every "linkage unit"
1133   must contain its own definition.
1134
1135   x86_64-linux-gnu
1136   ----------------
1137   Symbol removed: _ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6insertIPKcEENS_9enable_ifIXaasr21__is_forward_iteratorIT_EE5valuesr38__libcpp_string_gets_noexcept_iteratorISA_EE5valueENS_11__wrap_iterIPcEEE4typeENSB_IS8_EESA_SA_
1138   Symbol removed: _ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE7replaceIPKcEENS_9enable_ifIXsr19__is_input_iteratorIT_EE5valueERS5_E4typeENS_11__wrap_iterIS8_EESF_SA_SA_
1139   Symbol removed: _ZNSt3__112basic_stringIwNS_11char_traitsIwEENS_9allocatorIwEEE6insertIPKwEENS_9enable_ifIXaasr21__is_forward_iteratorIT_EE5valuesr38__libcpp_string_gets_noexcept_iteratorISA_EE5valueENS_11__wrap_iterIPwEEE4typeENSB_IS8_EESA_SA_
1140   Symbol removed: _ZNSt3__112basic_stringIwNS_11char_traitsIwEENS_9allocatorIwEEE7replaceIPKwEENS_9enable_ifIXsr19__is_input_iteratorIT_EE5valueERS5_E4typeENS_11__wrap_iterIS8_EESF_SA_SA_