[boost] [thread] fails to build on Cygwin with weird errors

Subject: [boost] [thread] fails to build on Cygwin with weird errors
From: Peter Dimov (lists_at_[hidden])
Date: 2015-01-14 22:22:45

Vicente,

I'm trying to get the pool tests up and running (they fail across the board, 
at least on develop), and one of them requires Thread, which fails to build 
under g++/Cygwin.

The errors are of the kind

..\..\..\libs\thread\src\win32\thread.cpp: In member function 'bool 
boost::thread::start_thread_noexcept()':
..\..\..\libs\thread\src\win32\thread.cpp:337:127: error: 'struct 
boost::detail::thread_data_base' has no member named 'id'
         uintptr_t const 
new_thread=_beginthreadex(0,0,&thread_start_function,thread_info.get(),CREATE_SUSPENDED,&thread_info->id);

which leads me to think that, on Cygwin, you're using the POSIX header with 
the Win32 source file.