I can compile this release in my macOS catalina, 10.15.1. I don't have lama installed in my OS, so I didn't have the issue below.only some warnings out. Thanks Liang----- 原始邮件 ----- 发件人：Marshall Clow via Boost 收件人：turkanis@coderage.com, Michael Caisse 抄送人：Marshall Clow , "boost@lists.boost.org List" 主题：Re: [boost] [release] Boost 1.72.0 Beta 1 Release Candidate 1 日期：2019年11月19日 04点38分 This appears to be https://github.com/boostorg/iostreams/issues/102, and https://github.com/boostorg/iostreams/pull/103 is a suggested fix. -- Marshall On Mon, Nov 18, 2019 at 11:56 AM Marshall Clow wrote:

On my Mac, I the version of LZMA that I have installed (via homebrew) does not have the multi-tasking calls (_lzma_cputhreads and _lzma_stream_encoder_mt). It identifies itself:

$ cat junk.cpp #include <iostream> #include "lzma.h"

int main() { std::cout << LZMA_VERSION << std::endl; }

$ clang++ junk.cpp && ./a.out 50020042 $

Changing libs/iostreams/src/lzma.cpp thus solves enables things to build:

#ifndef BOOST_IOSTREAMS_LZMA_NO_MULTITHREADED - #if LZMA_VERSION < 50020002 + #if LZMA_VERSION <= 50020042 #define BOOST_IOSTREAMS_LZMA_NO_MULTITHREADED #endif #endif

-- Marshall

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