"/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++" "-mmacosx-version-min=10.8" "-stdlib=libc++"  -ftemplate-depth-128 -std=c++11 -fvisibility=hidden     -I/Users/bitcoin/dev/bitcoin/depends/x86_64-apple-darwin17.6.0/include     -O3 -Wall -pedantic -gdwarf-2 -fexceptions -Wno-long-long -Wno-inline -arch x86_64  -DBOOST_ALL_NO_LIB=1 -DBOOST_CHRONO_STATIC_LINK=1 -DBOOST_SYSTEM_NO_DEPRECATED -DBOOST_SYSTEM_STATIC_LINK=1 -DBOOST_TIMER_STATIC_LINK=1 -DNDEBUG  -I"." -c -o "bin.v2/libs/test/build/darwin-4.2.1/release/link-static/threading-multi/unit_test_log.o" "libs/test/src/unit_test_log.cpp"

In file included from libs/test/src/unit_test_log.cpp:16:
In file included from ./boost/test/impl/unit_test_log.ipp:19:
In file included from ./boost/test/unit_test_log.hpp:18:
In file included from ./boost/test/tree/observer.hpp:17:
In file included from ./boost/test/detail/global_typedef.hpp:15:
In file included from ./boost/test/utils/basic_cstring/basic_cstring.hpp:20:
In file included from ./boost/test/utils/basic_cstring/basic_cstring_fwd.hpp:19:
In file included from ./boost/detail/workaround.hpp:41:
In file included from ./boost/config.hpp:57:
In file included from ./boost/config/platform/macos.hpp:28:
./boost/config/posix_features.hpp:18:15: fatal error: 'unistd.h' file not found
#     include <unistd.h>
              ^~~~~~~~~~
1 error generated.
...failed darwin.compile.c++ bin.v2/libs/test/build/darwin-4.2.1/release/link-static/threading-multi/unit_test_log.o...