Re: Cobalt link error

From: Josué Andrade Gomes (josuegomes_at_[hidden])
Date: 2023-12-23 22:23:30

No Cobalt library was built by b2.

Em sáb., 23 de dez. de 2023 às 18:45, Richard Hodges via Boost-users
<boost-users_at_[hidden]> escreveu:
>
> Don’t you need to actually link the library?
>
> Richard Hodges
> hodges.r_at_[hidden]
>
>
>
>
> On Sat, 23 Dec 2023 at 22:17, Josué Andrade Gomes via Boost-users <boost-users_at_[hidden]> wrote:
>>
>> Same error when building manually:
>>
>> $ g++ -I~/.local/include -L~/.local/lib -o sample ../sample4.cpp
>> -std=c++20 -fcoroutines -lboost_system
>> /usr/bin/ld: /tmp/ccr6j1MG.o: in function `co_main(co_main(int,
>> char**)::_Z7co_mainiPPc.Frame*) [clone .actor]':
>> sample4.cpp:(.text+0x2a9): undefined reference to
>> `boost::cobalt::detail::main_promise::final_suspend()'
>> /usr/bin/ld: /tmp/ccr6j1MG.o: in function
>> `main::reset_res::operator()(std::pmr::memory_resource*)':
>> sample4.cpp:(.text._ZZ4mainEN9reset_resclEPNSt3pmr15memory_resourceE[_ZZ4mainEN9reset_resclEPNSt3pmr15memory_resourceE]+0x1c):
>> undefined reference to
>> `boost::cobalt::this_thread::set_default_resource(std::pmr::memory_resource*)'
>> /usr/bin/ld: /tmp/ccr6j1MG.o: in function `main':
>> sample4.cpp:(.text.main[main]+0x5b): undefined reference to
>> `boost::cobalt::this_thread::set_default_resource(std::pmr::memory_resource*)'
>> /usr/bin/ld: sample4.cpp:(.text.main[main]+0xc2): undefined reference
>> to `boost::cobalt::detail::main_promise::run_main(boost::cobalt::main)'
>> /usr/bin/ld: /tmp/ccr6j1MG.o: in function `bool
>> boost::cobalt::detail::promise_receiver<void>::awaitable::await_suspend<boost::cobalt::detail::fork::promise_type>(std::__n4861::coroutine_handle<boost::cobalt::detail::fork::promise_type>)':
>> sample4.cpp:(.text._ZN5boost6cobalt6detail16promise_receiverIvE9awaitable13await_suspendINS1_4fork12promise_typeEEEbNSt7__n486116coroutine_handleIT_EE[_ZN5boost6cobalt6detail16promise_receiverIvE9awaitable13await_suspendINS1_4fork12promise_typeEEEbNSt7__n486116coroutine_handleIT_EE]+0x7f):
>> undefined reference to `boost::cobalt::detail::already_awaited()'
>> /usr/bin/ld: /tmp/ccr6j1MG.o: in function
>> `boost::cobalt::detail::promise_receiver<void>::awaitable::interrupt_await()
>> &':
>> sample4.cpp:(.text._ZNR5boost6cobalt6detail16promise_receiverIvE9awaitable15interrupt_awaitEv[_ZNR5boost6cobalt6detail16promise_receiverIvE9awaitable15interrupt_awaitEv]+0x33):
>> undefined reference to `boost::cobalt::detail::detached_exception()'
>> collect2: error: ld returned 1 exit status
>>
>> Em sáb., 23 de dez. de 2023 às 05:22, accelerator0099 via Boost-users
>> <boost-users_at_[hidden]> escreveu:
>> >
>> > CMake doesn't support cobalt (even the latest cmake 3.28.1 doesn't
>> > support it).
>> >
>> > On 12/21/23 22:29, Josué Andrade Gomes via Boost-users wrote:
>> > > cmake_minimum_required(VERSION 3.20)
>> > > project(coro_study)
>> > >
>> > > set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
>> > > set(CMAKE_CXX_STANDARD 20)
>> > > set(CMAKE_VERBOSE_MAKEFILE ON)
>> > >
>> > > set(Boost_VERBOSE 1)
>> > > set(Boost_DEBUG 1)
>> > >
>> > > find_package(Boost REQUIRED COMPONENTS system)
>> > >
>> > > add_executable(sample sample.cpp)
>> > >
>> > > target_include_directories(sample4 PRIVATE ${Boost_INCLUDE_DIRS})
>> > > target_link_libraries(sample4 PRIVATE ${Boost_LIBRARIES})
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