id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
9694	boost/thread.hpp doesn't compile with MinGW and -march=pentium3	Marcin Wojdyr <wojdyr@…>	Peter Dimov	"
I get the same with two 32-bit MinGW-w64 versions: from g++ 4.8.2 from MSYS2 and g++ 4.8.1 from mingw-builds.
This problem doesn't exist in boost 1.53. 

{{{
$ cat test.cpp
#include <boost/thread.hpp>

$ /mingw32/bin/g++ -I./checkout/boost_1_55_0 -march=pentium3 -c test.cpp
In file included from C:/msys64/mingw32/i686-w64-mingw32/include/intrin.h:151:0,
                 from ./checkout/boost_1_55_0/boost/detail/interlocked.hpp:146,
                 from ./checkout/boost_1_55_0/boost/thread/win32/thread_primitives.hpp:17,
                 from ./checkout/boost_1_55_0/boost/thread/win32/thread_data.hpp:11,
                 from ./checkout/boost_1_55_0/boost/thread/thread_only.hpp:15,
                 from ./checkout/boost_1_55_0/boost/thread/thread.hpp:12,
                 from ./checkout/boost_1_55_0/boost/thread.hpp:13,
                 from test.cpp:1:
C:/msys64/mingw32/i686-w64-mingw32/include/dvec.h: In function 'const __m128i get_mask128()':
C:/msys64/mingw32/i686-w64-mingw32/include/dvec.h:56:83: error: '_mm_set1_epi64' was not declared in this scope
   static const __m128i mask128 = _mm_set1_epi64(M64((__int64)0xffffffffffffffffll));
                                                                                   ^
C:/msys64/mingw32/i686-w64-mingw32/include/dvec.h: In member function 'M128& M128::operator&=(const M128&)':
C:/msys64/mingw32/i686-w64-mingw32/include/dvec.h:71:78: error: '_mm_and_si128' was not declared in this scope
   M128& operator&=(const M128 &a) { return *this = (M128) _mm_and_si128(vec,a); }
}}}

Googling around I've found the same error message here:
http://pastebin.com/4nXK0V73"	Bugs	closed	To Be Determined	smart_ptr	Boost 1.55.0	Regression	fixed