checking whether coroutines are enabled... no
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating asio.pc
config.status: creating Makefile
config.status: creating include/Makefile
config.status: creating src/Makefile
config.status: creating src/tests/Makefile
config.status: creating src/tests/properties/Makefile
config.status: creating src/examples/cpp11/Makefile
config.status: creating src/examples/cpp14/Makefile
config.status: creating src/examples/cpp17/Makefile
config.status: creating src/examples/cpp20/Makefile
config.status: executing depfiles commands
make
Making all in include
Making all in src
Making all in examples/cpp11
depbase=`echo allocation/server.o | sed 's|[^/]*$|.deps/&|;s|\.o$||'`; c++ -DPACKAGE_NAME=\"asio\" -DPACKAGE_TARNAME=\"asio\" -DPACKAGE_VERSION=\"1.30.2\" -DPACKAGE_STRING=\"asio\ 1.30.2\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE_URL=\"\" -DPACKAGE=\"asio\" -DVERSION=\"1.30.2\" -D_REENTRANT=1 -I.    -DASIO_STANDALONE -I./../../../include -std=c++14 -Wall -Wextra -O2 -pthread -ftemplate-depth-256 -MT allocation/server.o -MD -MP -MF $depbase.Tpo -c -o allocation/server.o allocation/server.cpp && mv -f $depbase.Tpo $depbase.Po
In file included from allocation/server.cpp:17:
In file included from ./../../../include/asio.hpp:114:
In file included from ./../../../include/asio/ip/network_v4.hpp:254:
./../../../include/asio/ip/impl/network_v4.ipp:71:9: error: use of undeclared identifier 'BOOST_FALLTHROUGH'
        BOOST_FALLTHROUGH;
        ^
./../../../include/asio/ip/impl/network_v4.ipp:74:9: error: use of undeclared identifier 'BOOST_FALLTHROUGH'
        BOOST_FALLTHROUGH;
        ^
./../../../include/asio/ip/impl/network_v4.ipp:77:9: error: use of undeclared identifier 'BOOST_FALLTHROUGH'
        BOOST_FALLTHROUGH;
        ^
./../../../include/asio/ip/impl/network_v4.ipp:80:9: error: use of undeclared identifier 'BOOST_FALLTHROUGH'
        BOOST_FALLTHROUGH;
        ^
./../../../include/asio/ip/impl/network_v4.ipp:83:9: error: use of undeclared identifier 'BOOST_FALLTHROUGH'
        BOOST_FALLTHROUGH;
        ^
./../../../include/asio/ip/impl/network_v4.ipp:86:9: error: use of undeclared identifier 'BOOST_FALLTHROUGH'
        BOOST_FALLTHROUGH;
        ^
./../../../include/asio/ip/impl/network_v4.ipp:89:9: error: use of undeclared identifier 'BOOST_FALLTHROUGH'
        BOOST_FALLTHROUGH;
        ^
7 errors generated.
*** Error code 1

Stop.
make[2]: stopped in /tmp/cirrus-ci-build/asio/src/examples/cpp11
*** Error code 1

Stop.
make[1]: stopped in /tmp/cirrus-ci-build/asio/src
*** Error code 1

Stop.
make: stopped in /tmp/cirrus-ci-build/asio