update boost

linx64/include/boost/context/detail/config.hpp

@@ -30,6 +30,10 @@
 # define BOOST_CONTEXT_DECL
 #endif
 
+#if ! defined(BOOST_USE_UCONTEXT) && defined(__CYGWIN__)
+# define BOOST_USE_UCONTEXT
+#endif
+
 #if ! defined(BOOST_CONTEXT_SOURCE) && ! defined(BOOST_ALL_NO_LIB) && ! defined(BOOST_CONTEXT_NO_LIB)
 # define BOOST_LIB_NAME boost_context
 # if defined(BOOST_ALL_DYN_LINK) || defined(BOOST_CONTEXT_DYN_LINK)
@@ -124,4 +128,9 @@ static constexpr std::size_t prefetch_stride{ 4 * cacheline_length };
 # include <cxxabi.h>
 #endif
 
+#if defined(__OpenBSD__)
+// stacks need mmap(2) with MAP_STACK
+# define BOOST_CONTEXT_USE_MAP_STACK
+#endif
+
 #endif // BOOST_CONTEXT_DETAIL_CONFIG_H

linx64/include/boost/context/detail/exception.hpp

@@ -22,21 +22,12 @@ namespace detail {
 
 struct forced_unwind {
     fcontext_t  fctx{ nullptr };
-#ifndef BOOST_ASSERT_IS_VOID
-    bool        caught{ false };
-#endif
 
     forced_unwind() = default;
 
     forced_unwind( fcontext_t fctx_) :
         fctx( fctx_) {
     }
-
-#ifndef BOOST_ASSERT_IS_VOID
-    ~forced_unwind() {
-        BOOST_ASSERT( caught);
-    }
-#endif
 };
 
 }}}

linx64/include/boost/context/detail/index_sequence.hpp

@@ -13,6 +13,10 @@
 
 #include <boost/context/detail/config.hpp>
 
+#if defined(BOOST_CONTEXT_NO_CXX14_INTEGER_SEQUENCE)
+#include <boost/mp11/integer_sequence.hpp>
+#endif
+
 #ifdef BOOST_HAS_ABI_HEADERS
 # include BOOST_ABI_PREFIX
 #endif
@@ -29,38 +33,12 @@ using make_index_sequence = std::make_index_sequence< I >;
 template< typename ... T >
 using index_sequence_for = std::index_sequence_for< T ... >;
 #else
-//http://stackoverflow.com/questions/17424477/implementation-c14-make-integer-sequence
-
 template< std::size_t ... I >
-struct index_sequence {
-    using type = index_sequence;
-    using value_type = std::size_t;
-    static constexpr std::size_t size() {
-        return sizeof ... (I);
-    }
-};
-
-template< typename Seq1, typename Seq2 >
-struct concat_sequence;
-
-template< std::size_t ... I1, std::size_t ... I2 >
-struct concat_sequence< index_sequence< I1 ... >, index_sequence< I2 ... > > : public index_sequence< I1 ..., (sizeof ... (I1)+I2) ... > {
-};
-
+using index_sequence = mp11::index_sequence< I ... >;
 template< std::size_t I >
-struct make_index_sequence : public concat_sequence< typename make_index_sequence< I/2 >::type,
-                                                     typename make_index_sequence< I-I/2 >::type > {
-};
-
-template<>
-struct make_index_sequence< 0 > : public index_sequence<> {
-};
-template<>
-struct make_index_sequence< 1 > : public index_sequence< 0 > {
-};
-
+using make_index_sequence = mp11::make_index_sequence< I >;
 template< typename ... T >
-using index_sequence_for = make_index_sequence< sizeof ... (T) >;
+using index_sequence_for = mp11::index_sequence_for< T ... >;
 #endif
 
 }}}

linx64/include/boost/context/detail/prefetch.hpp

@@ -18,7 +18,7 @@
 #include <immintrin.h>
 #endif
 
-#if BOOST_COMP_MSVC
+#if BOOST_COMP_MSVC && !defined(_M_ARM) && !defined(_M_ARM64)
 #include <mmintrin.h>
 #endif
 
@@ -44,7 +44,7 @@ void prefetch( void * addr) {
     // L1 cache : hint == _MM_HINT_T0
     _mm_prefetch( (const char *)addr, _MM_HINT_T0);
 }
-#elif BOOST_COMP_MSVC
+#elif BOOST_COMP_MSVC && !defined(_M_ARM) && !defined(_M_ARM64)
 #define BOOST_HAS_PREFETCH 1
 BOOST_FORCEINLINE
 void prefetch( void * addr) {