thrift @0.13.0 build fails

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I'm getting this build error on macOS 11.2.1

Also I see here ​https://ports.macports.org/port/thrift/builds that build status is red for 11_x86_64.

:info:build Undefined symbols for architecture x86_64: :info:build "apache::thrift::concurrency::Thread::threadMain(std::1::shared_ptr<apache::thrift::concurrency::Thread>)", referenced from: :info:build apache::thrift::concurrency::Thread::start() in libthriftnb_la-TNonblockingServer.o

:info:build "apache::thrift::GlobalOutput", referenced from: :info:build apache::thrift::server::TNonblockingServer::TConnection::workSocket() in libthriftnb_la-TNonblockingServer.o :info:build apache::thrift::server::TNonblockingServer::TConnection::transition() in libthriftnb_la-TNonblockingServer.o :info:build apache::thrift::server::TNonblockingServer::TConnection::setFlags(short) in libthriftnb_la-TNonblockingServer.o :info:build apache::thrift::server::TNonblockingServer::handleEvent(int, short) in libthriftnb_la-TNonblockingServer.o

<and more of that>

I see this in the beginning of log (full log attached):

:warn:main The macOS 11.2 SDK does not appear to be installed. Ports may not build correctly. :warn:main You can install it as part of the Xcode Command Line Tools package by running `xcode-select --install'.

I've reinstalled command line tools by removing /Library/Developer/CommandLineTools and running xcode-select as suggested, but the warning won't go away.

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