boost187: close_handles.cpp: error: expected id-expression before '(' token

[barracuda156]

Hopefully the last remaining breakage:

:info:build darwin.compile.c++ bin.v2/libs/process/build/darwin-14.2.0/release/power_32/boost.process.fs-boost/threading-multi/visibility-hidden/posix/close_handles.o
:info:build     "/opt/local/bin/g++-mp-14"   -fvisibility-inlines-hidden -Os -std=gnu++17 -D_GLIBCXX_USE_CXX11_ABI=0 -arch ppc  -fPIC -m32 -O3 -Wall -fvisibility=hidden -dynamic -gdwarf-2 -fexceptions -Wno-inline  -DBOOST_ALL_NO_LIB=1 -DBOOST_ASIO_NO_DEPRECATED -DBOOST_ATOMIC_DYN_LINK=1 -DBOOST_ATOMIC_NO_LIB=1 -DBOOST_COBALT_USE_STD_PMR=1 -DBOOST_CONTEXT_DYN_LINK=1 -DBOOST_CONTEXT_NO_LIB=1 -DBOOST_DATE_TIME_DYN_LINK=1 -DBOOST_DISABLE_ASSERTS -DBOOST_FILESYSTEM_DYN_LINK=1 -DBOOST_FILESYSTEM_NO_LIB=1 -DBOOST_PROCESS_DYN_LINK=1 -DBOOST_PROCESS_SOURCE=1 -DBOOST_SYSTEM_DYN_LINK=1 -DBOOST_SYSTEM_NO_LIB=1 -DDATE_TIME_INLINE -DNDEBUG   -I"." -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/asio/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/assert/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/atomic/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/container_hash/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/context/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/core/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/describe/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/detail/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/filesystem/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/function_types/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/iterator/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/move/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/mp11/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/optional/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/predef/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/process/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/scope/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/smart_ptr/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/system/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/throw_exception/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/type_index/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/variant2/include" -I"/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/winapi/include"  -c -o "bin.v2/libs/process/build/darwin-14.2.0/release/power_32/boost.process.fs-boost/threading-multi/visibility-hidden/posix/close_handles.o" "/opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/process/src/posix/close_handles.cpp"
:info:build In file included from /opt/local/include/LegacySupport/dirent.h:27,
:info:build                  from /opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/process/src/posix/close_handles.cpp:88:
:info:build /opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/process/src/posix/close_handles.cpp: In function 'void boost::process::v2::posix::detail::close_all(const std::vector<int>&, boost::system::error_code&)':
:info:build /opt/local/var/macports/build/_opt_local_ppcports_devel_boost187/boost187/work/boost_1_87_0/libs/process/src/posix/close_handles.cpp:188:21: error: expected id-expression before '(' token
:info:build   188 |     auto dir_fd = ::dirfd(dir.get());
:info:build       |                     ^~~~~
:info:build ...failed darwin.compile.c++ bin.v2/libs/process/build/darwin-14.2.0/release/power_32/boost.process.fs-boost/threading-multi/visibility-hidden/posix/close_handles.o...

[barracuda156]

Also same error on NetBSD, so looks like a genuine bug: ​https://github.com/boostorg/process/issues/461