As always, the release managers would appreciate it if you download the candidate of your choice and give building it a try. Please report both success and failure, and anything else that is noteworthy.
-- The Release Managers
I have successfully built the libraries on M1 Mac running macOS Sonoma 14.3.1 with Clang 17.0.6 using cxxstd=11,14,17,20,23. On the same platform using homebrew gcc-13 13.2.0 I get build failures with boost.fiber and boost.coroutine. b2 has the following error: error: No best alternative for libs/context/build/asm_sources with <abi>aapcs <address-model>64 <architecture>arm <asynch-exceptions>off <binary-format>mach-o <boost.cobalt.executor>any_io_executor <boost.cobalt.pmr>std <context-impl>fcontext <coverage>off <cxxstd-dialect>iso <cxxstd>17 <debug-symbols>off <deduced-address-model>64 <deduced-architecture>arm <exception-handling>on <extern-c-nothrow>off <inlining>full <link>shared <optimization>speed <os>MACOSX <pch>on <preserve-test-targets>on <profiling>off <python-debugging>off <python>3.11 <relevant>abi <relevant>address-model <relevant>architecture <relevant>binary-format <relevant>toolset <rtti>on <runtime-debugging>off <runtime-link>shared <stdlib>native <strip>off <target-os>darwin <testing.execute>on <threadapi>pthread <threading>multi <toolset-gcc:version>13 <toolset>gcc <variant>release <vectorize>off <visibility>hidden <warnings-as-errors>off <warnings>on no match: <abi>aapcs <address-model>32 <architecture>arm <binary-format>elf <threading>multi <toolset>clang no match: <abi>aapcs <address-model>32 <architecture>arm <binary-format>elf <threading>multi <toolset>gcc no match: <abi>aapcs <address-model>32 <architecture>arm <binary-format>elf <threading>multi <toolset>qcc no match: <abi>aapcs <address-model>32 <architecture>arm <binary-format>mach-o <threading>multi <toolset>clang no match: <abi>aapcs <address-model>32 <architecture>arm <binary-format>mach-o <threading>multi <toolset>darwin no match: <abi>aapcs <address-model>32 <architecture>arm <binary-format>pe <threading>multi <toolset>msvc no match: <abi>aapcs <address-model>64 <architecture>arm <binary-format>elf <threading>multi <toolset>clang no match: <abi>aapcs <address-model>64 <architecture>arm <binary-format>elf <threading>multi <toolset>gcc no match: <abi>aapcs <address-model>64 <architecture>arm <binary-format>mach-o <threading>multi <toolset>clang no match: <abi>aapcs <address-model>64 <architecture>arm <binary-format>mach-o <threading>multi <toolset>darwin no match: <abi>aapcs <address-model>64 <architecture>arm <binary-format>pe <threading>multi <toolset>msvc no match: <abi>sysv <address-model>64 <architecture>loongarch <binary-format>elf <threading>multi <toolset>gcc no match: <abi>o32 <address-model>32 <architecture>mips <binary-format>elf <threading>multi <toolset>clang no match: <abi>o32 <address-model>32 <architecture>mips <binary-format>elf <threading>multi <toolset>gcc no match: <abi>n64 <address-model>64 <architecture>mips <binary-format>elf <threading>multi <toolset>clang no match: <abi>n64 <address-model>64 <architecture>mips <binary-format>elf <threading>multi <toolset>gcc no match: <abi>sysv <address-model>32 <architecture>power <binary-format>elf <threading>multi <toolset>clang no match: <abi>sysv <address-model>32 <architecture>power <binary-format>elf <threading>multi <toolset>gcc no match: <abi>sysv <address-model>32 <architecture>power <binary-format>mach-o <threading>multi <toolset>clang no match: <abi>sysv <address-model>32 <architecture>power <binary-format>mach-o <threading>multi <toolset>gcc no match: <abi>sysv <address-model>32 <architecture>power <binary-format>mach-o <threading>multi <toolset>darwin no match: <abi>sysv <address-model>32 <architecture>power <binary-format>xcoff <threading>multi <toolset>clang no match: <abi>sysv <address-model>32 <architecture>power <binary-format>xcoff <threading>multi <toolset>gcc no match: <abi>sysv <address-model>64 <architecture>power <binary-format>elf <threading>multi <toolset>clang no match: <abi>sysv <address-model>64 <architecture>power <binary-format>elf <threading>multi <toolset>gcc no match: <abi>sysv <address-model>64 <architecture>power <binary-format>mach-o <threading>multi <toolset>clang no match: <abi>sysv <address-model>64 <architecture>power <binary-format>mach-o <threading>multi <toolset>gcc no match: <abi>sysv <address-model>64 <architecture>power <binary-format>mach-o <threading>multi <toolset>darwin no match: <abi>sysv <address-model>64 <architecture>power <binary-format>xcoff <threading>multi <toolset>clang no match: <abi>sysv <address-model>64 <architecture>power <binary-format>xcoff <threading>multi <toolset>gcc no match: <abi>sysv <address-model>32_64 <architecture>power <binary-format>mach-o <threading>multi no match: <abi>sysv <address-model>64 <architecture>riscv <binary-format>elf <threading>multi <toolset>clang no match: <abi>sysv <address-model>64 <architecture>riscv <binary-format>elf <threading>multi <toolset>gcc no match: <abi>sysv <address-model>64 <architecture>s390x <binary-format>elf <threading>multi <toolset>gcc no match: <abi>sysv <address-model>64 <architecture>s390x <binary-format>elf <threading>multi <toolset>clang no match: <abi>sysv <address-model>32 <architecture>x86 <binary-format>elf <threading>multi <toolset>clang no match: <abi>sysv <address-model>32 <architecture>x86 <binary-format>elf <threading>multi <toolset>gcc no match: <abi>sysv <address-model>32 <architecture>x86 <binary-format>elf <threading>multi <toolset>intel no match: <abi>sysv <address-model>32 <architecture>x86 <binary-format>mach-o <threading>multi <toolset>clang no match: <abi>sysv <address-model>32 <architecture>x86 <binary-format>mach-o <threading>multi <toolset>darwin no match: <abi>ms <address-model>32 <architecture>x86 <binary-format>pe <threading>multi <toolset>clang no match: <abi>ms <address-model>32 <architecture>x86 <binary-format>pe <threading>multi <toolset>clang-win no match: <abi>ms <address-model>32 <architecture>x86 <binary-format>pe <threading>multi <toolset>gcc no match: <abi>ms <address-model>32 <architecture>x86 <binary-format>pe <threading>multi <toolset>intel no match: <abi>ms <address-model>32 <architecture>x86 <binary-format>pe <threading>multi <toolset>msvc no match: <abi>ms <address-model>32 <architecture>x86 <binary-format>pe <threading>multi <toolset>embarcadero no match: <abi>ms <address-model>32 <architecture>x86 <binary-format>pe <threading>multi <toolset>borland no match: <abi>sysv <address-model>64 <architecture>x86 <binary-format>elf <threading>multi <toolset>clang no match: <abi>sysv <address-model>64 <architecture>x86 <binary-format>elf <threading>multi <toolset>gcc no match: <abi>sysv <address-model>64 <architecture>x86 <binary-format>elf <threading>multi <toolset>intel no match: <abi>sysv <address-model>64 <architecture>x86 <binary-format>mach-o <threading>multi <toolset>clang no match: <abi>sysv <address-model>64 <architecture>x86 <binary-format>mach-o <threading>multi <toolset>gcc no match: <abi>sysv <address-model>64 <architecture>x86 <binary-format>mach-o <threading>multi <toolset>darwin no match: <abi>sysv <address-model>64 <architecture>x86 <binary-format>mach-o <threading>multi <toolset>intel no match: <abi>ms <address-model>64 <architecture>x86 <binary-format>pe <threading>multi <toolset>clang no match: <abi>ms <address-model>64 <architecture>x86 <binary-format>pe <threading>multi <toolset>clang-win no match: <abi>ms <address-model>64 <architecture>x86 <binary-format>pe <threading>multi <toolset>gcc no match: <abi>ms <address-model>64 <architecture>x86 <binary-format>pe <threading>multi <toolset>intel no match: <abi>ms <address-model>64 <architecture>x86 <binary-format>pe <threading>multi <toolset>msvc no match: <abi>ms <address-model>64 <architecture>x86 <binary-format>pe <threading>multi <toolset>embarcadero no match: <abi>x32 <address-model>32 <architecture>x86 <binary-format>elf <threading>multi <toolset>clang no match: <abi>x32 <address-model>32 <architecture>x86 <binary-format>elf <threading>multi <toolset>gcc no match: <abi>x32 <address-model>32 <architecture>x86 <binary-format>elf <threading>multi <toolset>intel no match: <abi>sysv <address-model>32_64 <architecture>x86 <binary-format>mach-o <threading>multi no match: <abi>sysv <architecture>arm+x86 <binary-format>mach-o <threading>multi Boost.Fiber fails with: gcc.link.dll bin.v2/libs/fiber/build/gcc-13/release/cxxstd-17-iso/threading-multi/visibility-hidden/libboost_fiber.dylib ld: warning: -single_module is obsolete ld: warning: ignoring duplicate libraries: '-lgcc' ld: Undefined symbols: _jump_fcontext, referenced from: __ZN5boost7context6detail11fiber_entryINS1_12fiber_recordINS0_5fiberENS_6fibers23stack_allocator_wrapperESt5_BindIFMNS5_18dispatcher_contextEFS4_OS4_EPS8_St12_PlaceholderILi1EEEEEEEEvNS1_10transfer_tE in context.o __ZN5boost6fibers19context_initializer10initializeENS_13intrusive_ptrINS0_4algo9algorithmEEEONS0_23stack_allocator_wrapperE.isra.0 in context.o __ZN5boost6fibers19context_initializer10initializeENS_13intrusive_ptrINS0_4algo9algorithmEEEONS0_23stack_allocator_wrapperE.isra.0 in context.o __ZN5boost6fibers5fiber4joinEv in fiber.o __ZN5boost6fibers5fiber6detachEv in fiber.o __ZN5boost6fibers9schedulerD1Ev in scheduler.o __ZN5boost6fibers9schedulerD1Ev in scheduler.o ... _make_fcontext, referenced from: __ZN5boost6fibers19context_initializer10initializeENS_13intrusive_ptrINS0_4algo9algorithmEEEONS0_23stack_allocator_wrapperE.isra.0 in context.o _ontop_fcontext, referenced from: __ZN5boost7context6detail11fiber_entryINS1_12fiber_recordINS0_5fiberENS_6fibers23stack_allocator_wrapperESt5_BindIFMNS5_18dispatcher_contextEFS4_OS4_EPS8_St12_PlaceholderILi1EEEEEEEEvNS1_10transfer_tE in context.o __ZN5boost7context6detail11fiber_entryINS1_12fiber_recordINS0_5fiberENS_6fibers23stack_allocator_wrapperESt5_BindIFMNS5_18dispatcher_contextEFS4_OS4_EPS8_St12_PlaceholderILi1EEEEEEEEvNS1_10transfer_tE in context.o __ZN5boost7context6detail11fiber_entryINS1_12fiber_recordINS0_5fiberENS_6fibers23stack_allocator_wrapperESt5_BindIFMNS5_18dispatcher_contextEFS4_OS4_EPS8_St12_PlaceholderILi1EEEEEEEEvNS1_10transfer_tE in context.o __ZN5boost7context6detail11fiber_ontopINS0_5fiberEZNS_6fibers7context15suspend_with_ccEvEUlOS3_E_EENS1_10transfer_tES8_ in context.o __ZN5boost7context6detail11fiber_ontopINS0_5fiberEZNS_6fibers7context6resumeEvEUlOS3_E_EENS1_10transfer_tES8_ in context.o __ZN5boost7context6detail11fiber_ontopINS0_5fiberEZNS_6fibers7context6resumeERSt11unique_lockINS4_6detail13spinlock_ttasEEEUlOS3_E_EENS1_10transfer_tESD_ in context.o __ZN5boost6fibers7contextD1Ev in context.o ... collect2: error: ld returned 1 exit status and Boost.Coroutine fails with: gcc.link.dll bin.v2/libs/coroutine/build/gcc-13/release/cxxstd-17-iso/threading-multi/visibility-hidden/libboost_coroutine.dylib ld: warning: -single_module is obsolete ld: warning: ignoring duplicate libraries: '-lgcc' ld: Undefined symbols: _jump_fcontext, referenced from: __ZN5boost10coroutines6detail17coroutine_context4jumpERS2_Pv in coroutine_context.o _make_fcontext, referenced from: __ZN5boost10coroutines6detail17coroutine_contextC2EPFvNS_7context6detail10transfer_tEERKNS1_12preallocatedE in coroutine_context.o __ZN5boost10coroutines6detail17coroutine_contextC1EPFvNS_7context6detail10transfer_tEERKNS1_12preallocatedE in coroutine_context.o collect2: error: ld returned 1 exit status Here is a gist with the complete build log: https://gist.github.com/mborland/781bf2740c30a2af93d1cdcbcb132337 Matt