...found 1 target...
...found 19 targets...
...updating 2 targets...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_cxx20_atomic_ref.obj
has_cxx20_atomic_ref.cpp
libs\filesystem\config\has_cxx20_atomic_ref.cpp(15): error C2039: 'atomic_ref': is not a member of 'std'
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30133\include\atomic(211): note: see declaration of 'std'
libs\filesystem\config\has_cxx20_atomic_ref.cpp(15): error C2065: 'atomic_ref': undeclared identifier
libs\filesystem\config\has_cxx20_atomic_ref.cpp(15): error C2059: syntax error: '>'
libs\filesystem\config\has_cxx20_atomic_ref.cpp(16): error C2065: 'ref': undeclared identifier
libs\filesystem\config\has_cxx20_atomic_ref.cpp(17): error C2065: 'ref': undeclared identifier

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_cxx20_atomic_ref.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_cxx20_atomic_ref.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /Z7 /Od /Ob0 /W3 /MDd /Zc:forScope /Zc:wchar_t /Zc:inline /favor:blend -c -DBOOST_ALL_NO_LIB=1 "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_cxx20_atomic_ref.obj...
...failed updating 1 target...
...updated 1 target...
...found 137 targets...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_statx.obj
has_statx.cpp
libs\filesystem\config\has_statx.cpp(12): fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_statx.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_statx.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /Z7 /Od /Ob0 /W3 /MDd /Zc:forScope /Zc:wchar_t /Zc:inline /favor:blend -c -DBOOST_ALL_NO_LIB=1 "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_statx.obj...
...failed updating 1 target...
...found 4 targets...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_statx_syscall.obj
has_statx_syscall.cpp
libs\filesystem\config\has_statx_syscall.cpp(10): fatal error C1083: Cannot open include file: 'sys/syscall.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_statx_syscall.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_statx_syscall.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /Z7 /Od /Ob0 /W3 /MDd /Zc:forScope /Zc:wchar_t /Zc:inline /favor:blend -c -DBOOST_ALL_NO_LIB=1 "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_statx_syscall.obj...
...failed updating 1 target...
...patience...
...found 10 targets...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_bcrypt.obj
has_bcrypt.cpp
...updated 1 target...
...found 2 targets...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_attribute_init_priority.obj
has_attribute_init_priority.cpp
libs\filesystem\config\has_attribute_init_priority.cpp(14): error C3861: 'init_priority': identifier not found
libs\filesystem\config\has_attribute_init_priority.cpp(14): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
libs\filesystem\config\has_attribute_init_priority.cpp(15): error C2146: syntax error: missing ';' before identifier 'global_class'

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_attribute_init_priority.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_attribute_init_priority.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /Z7 /Od /Ob0 /W3 /MDd /Zc:forScope /Zc:wchar_t /Zc:inline /favor:blend -c -DBOOST_ALL_NO_LIB=1 "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_attribute_init_priority.obj...
...failed updating 1 target...
...found 2 targets...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_mtim.obj
has_stat_st_mtim.cpp
libs\filesystem\config\has_stat_st_mtim.cpp(12): fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_stat_st_mtim.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_mtim.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /Z7 /Od /Ob0 /W3 /MDd /Zc:forScope /Zc:wchar_t /Zc:inline /favor:blend -c -DBOOST_ALL_NO_LIB=1 "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_mtim.obj...
...failed updating 1 target...
...found 2 targets...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_mtimensec.obj
has_stat_st_mtimensec.cpp
libs\filesystem\config\has_stat_st_mtimensec.cpp(12): fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_stat_st_mtimensec.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_mtimensec.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /Z7 /Od /Ob0 /W3 /MDd /Zc:forScope /Zc:wchar_t /Zc:inline /favor:blend -c -DBOOST_ALL_NO_LIB=1 "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_mtimensec.obj...
...failed updating 1 target...
...found 2 targets...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_mtimespec.obj
has_stat_st_mtimespec.cpp
libs\filesystem\config\has_stat_st_mtimespec.cpp(12): fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_stat_st_mtimespec.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_mtimespec.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /Z7 /Od /Ob0 /W3 /MDd /Zc:forScope /Zc:wchar_t /Zc:inline /favor:blend -c -DBOOST_ALL_NO_LIB=1 "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_mtimespec.obj...
...failed updating 1 target...
...found 2 targets...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_birthtim.obj
has_stat_st_birthtim.cpp
libs\filesystem\config\has_stat_st_birthtim.cpp(12): fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_stat_st_birthtim.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_birthtim.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /Z7 /Od /Ob0 /W3 /MDd /Zc:forScope /Zc:wchar_t /Zc:inline /favor:blend -c -DBOOST_ALL_NO_LIB=1 "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_birthtim.obj...
...failed updating 1 target...
...found 2 targets...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_birthtimensec.obj
has_stat_st_birthtimensec.cpp
libs\filesystem\config\has_stat_st_birthtimensec.cpp(12): fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_stat_st_birthtimensec.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_birthtimensec.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /Z7 /Od /Ob0 /W3 /MDd /Zc:forScope /Zc:wchar_t /Zc:inline /favor:blend -c -DBOOST_ALL_NO_LIB=1 "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_birthtimensec.obj...
...failed updating 1 target...
...found 2 targets...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_birthtimespec.obj
has_stat_st_birthtimespec.cpp
libs\filesystem\config\has_stat_st_birthtimespec.cpp(12): fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_stat_st_birthtimespec.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_birthtimespec.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /Z7 /Od /Ob0 /W3 /MDd /Zc:forScope /Zc:wchar_t /Zc:inline /favor:blend -c -DBOOST_ALL_NO_LIB=1 "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\debug\threading-multi\has_stat_st_birthtimespec.obj...
...failed updating 1 target...
...found 3 targets...
...updating 2 targets...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_cxx20_atomic_ref.obj
has_cxx20_atomic_ref.cpp
libs\filesystem\config\has_cxx20_atomic_ref.cpp(15): error C2039: 'atomic_ref': is not a member of 'std'
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30133\include\atomic(211): note: see declaration of 'std'
libs\filesystem\config\has_cxx20_atomic_ref.cpp(15): error C2065: 'atomic_ref': undeclared identifier
libs\filesystem\config\has_cxx20_atomic_ref.cpp(15): error C2059: syntax error: '>'
libs\filesystem\config\has_cxx20_atomic_ref.cpp(16): error C2065: 'ref': undeclared identifier
libs\filesystem\config\has_cxx20_atomic_ref.cpp(17): error C2065: 'ref': undeclared identifier

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_cxx20_atomic_ref.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_cxx20_atomic_ref.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /O2 /Ob2 /W3 /MD /Zc:forScope /Zc:wchar_t /Zc:inline /Gw /favor:blend -c -DBOOST_ALL_NO_LIB=1 -DNDEBUG "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_cxx20_atomic_ref.obj...
...failed updating 1 target...
...updated 1 target...
...found 1 target...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_statx.obj
has_statx.cpp
libs\filesystem\config\has_statx.cpp(12): fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_statx.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_statx.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /O2 /Ob2 /W3 /MD /Zc:forScope /Zc:wchar_t /Zc:inline /Gw /favor:blend -c -DBOOST_ALL_NO_LIB=1 -DNDEBUG "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_statx.obj...
...failed updating 1 target...
...found 1 target...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_statx_syscall.obj
has_statx_syscall.cpp
libs\filesystem\config\has_statx_syscall.cpp(10): fatal error C1083: Cannot open include file: 'sys/syscall.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_statx_syscall.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_statx_syscall.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /O2 /Ob2 /W3 /MD /Zc:forScope /Zc:wchar_t /Zc:inline /Gw /favor:blend -c -DBOOST_ALL_NO_LIB=1 -DNDEBUG "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_statx_syscall.obj...
...failed updating 1 target...
...found 1 target...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_bcrypt.obj
has_bcrypt.cpp
...updated 1 target...
...found 1 target...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_attribute_init_priority.obj
has_attribute_init_priority.cpp
libs\filesystem\config\has_attribute_init_priority.cpp(14): error C3861: 'init_priority': identifier not found
libs\filesystem\config\has_attribute_init_priority.cpp(14): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
libs\filesystem\config\has_attribute_init_priority.cpp(15): error C2146: syntax error: missing ';' before identifier 'global_class'

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_attribute_init_priority.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_attribute_init_priority.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /O2 /Ob2 /W3 /MD /Zc:forScope /Zc:wchar_t /Zc:inline /Gw /favor:blend -c -DBOOST_ALL_NO_LIB=1 -DNDEBUG "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_attribute_init_priority.obj...
...failed updating 1 target...
...found 1 target...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_mtim.obj
has_stat_st_mtim.cpp
libs\filesystem\config\has_stat_st_mtim.cpp(12): fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_stat_st_mtim.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_mtim.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /O2 /Ob2 /W3 /MD /Zc:forScope /Zc:wchar_t /Zc:inline /Gw /favor:blend -c -DBOOST_ALL_NO_LIB=1 -DNDEBUG "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_mtim.obj...
...failed updating 1 target...
...found 1 target...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_mtimensec.obj
has_stat_st_mtimensec.cpp
libs\filesystem\config\has_stat_st_mtimensec.cpp(12): fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_stat_st_mtimensec.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_mtimensec.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /O2 /Ob2 /W3 /MD /Zc:forScope /Zc:wchar_t /Zc:inline /Gw /favor:blend -c -DBOOST_ALL_NO_LIB=1 -DNDEBUG "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_mtimensec.obj...
...failed updating 1 target...
...found 1 target...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_mtimespec.obj
has_stat_st_mtimespec.cpp
libs\filesystem\config\has_stat_st_mtimespec.cpp(12): fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_stat_st_mtimespec.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_mtimespec.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /O2 /Ob2 /W3 /MD /Zc:forScope /Zc:wchar_t /Zc:inline /Gw /favor:blend -c -DBOOST_ALL_NO_LIB=1 -DNDEBUG "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_mtimespec.obj...
...failed updating 1 target...
...found 1 target...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_birthtim.obj
has_stat_st_birthtim.cpp
libs\filesystem\config\has_stat_st_birthtim.cpp(12): fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_stat_st_birthtim.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_birthtim.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /O2 /Ob2 /W3 /MD /Zc:forScope /Zc:wchar_t /Zc:inline /Gw /favor:blend -c -DBOOST_ALL_NO_LIB=1 -DNDEBUG "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_birthtim.obj...
...failed updating 1 target...
...found 1 target...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_birthtimensec.obj
has_stat_st_birthtimensec.cpp
libs\filesystem\config\has_stat_st_birthtimensec.cpp(12): fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_stat_st_birthtimensec.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_birthtimensec.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /O2 /Ob2 /W3 /MD /Zc:forScope /Zc:wchar_t /Zc:inline /Gw /favor:blend -c -DBOOST_ALL_NO_LIB=1 -DNDEBUG "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_birthtimensec.obj...
...failed updating 1 target...
...found 1 target...
...updating 1 target...
compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_birthtimespec.obj
has_stat_st_birthtimespec.cpp
libs\filesystem\config\has_stat_st_birthtimespec.cpp(12): fatal error C1083: Cannot open include file: 'unistd.h': No such file or directory

    call "build_x64\boost\bin.v2\standalone\msvc\msvc-14.2\msvc-setup.bat"  >nul
 cl /Zm800 -nologo "libs\filesystem\config\has_stat_st_birthtimespec.cpp" -Fo"build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_birthtimespec.obj"     -TP /wd4675 /EHs /GR /Zc:throwingNew /O2 /Ob2 /W3 /MD /Zc:forScope /Zc:wchar_t /Zc:inline /Gw /favor:blend -c -DBOOST_ALL_NO_LIB=1 -DNDEBUG "-I." "-Ilibs\filesystem\src" 

...failed compile-c-c++ build_x64\boost\bin.v2\libs\filesystem\config\msvc-14.2\release\threading-multi\has_stat_st_birthtimespec.obj...
...failed updating 1 target...
...found 1 target...
...updating 1 target...
config-cache.write build_x64\boost\bin.v2\project-cache.jam
...updated 1 target...