diff --git a/include/boost/config/platform/cygwin.hpp b/include/boost/config/platform/cygwin.hpp
index 0fd2ebe2..8686058a 100644
--- a/include/boost/config/platform/cygwin.hpp
+++ b/include/boost/config/platform/cygwin.hpp
@@ -12,6 +12,8 @@
 #define BOOST_NO_CWCHAR
 #define BOOST_NO_SWPRINTF
 #define BOOST_HAS_DIRENT_H
+#define BOOST_HAS_LOG1P
+#define BOOST_HAS_EXPM1
 
 //
 // Threading API:
diff --git a/include/boost/config/posix_features.hpp b/include/boost/config/posix_features.hpp
index 4afb476b..d1295479 100644
--- a/include/boost/config/posix_features.hpp
+++ b/include/boost/config/posix_features.hpp
@@ -74,14 +74,22 @@
       // BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE:
       // These are predicated on _XOPEN_VERSION, and appears to be first released
       // in issue 4, version 2 (_XOPEN_VERSION > 500).
+      // Likewise for the functions log1p and expm1.
 #     if defined(_XOPEN_VERSION) && (_XOPEN_VERSION+0 >= 500)
 #        define BOOST_HAS_GETTIMEOFDAY
 #        if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE+0 >= 500)
 #           define BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE
 #        endif
+#        ifndef BOOST_HAS_LOG1P
+#           define BOOST_HAS_LOG1P
+#        endif
+#        ifndef BOOST_HAS_EXPM1
+#           define BOOST_HAS_EXPM1
+#        endif
 #     endif
 
 #  endif
 
 
 
+
diff --git a/include/boost/config/select_stdlib_config.hpp b/include/boost/config/select_stdlib_config.hpp
index b7bf5914..20a24a75 100644
--- a/include/boost/config/select_stdlib_config.hpp
+++ b/include/boost/config/select_stdlib_config.hpp
@@ -12,12 +12,12 @@
 // locate which std lib we are using and define BOOST_STDLIB_CONFIG as needed:
 
 // we need to include a std lib header here in order to detect which
-// library is in use, use <utility> as it's about the smallest
+// library is in use, use <iosfwd> as it's about the smallest
 // of the std lib headers - do not rely on this header being included -
 // users can short-circuit this header if they know whose std lib
 // they are using.
 
-#include <utility>
+#include <iosfwd>
 
 #if defined(__SGI_STL_PORT) || defined(_STLPORT_VERSION)
 // STLPort library; this _must_ come first, otherwise since
diff --git a/include/boost/config/stdlib/dinkumware.hpp b/include/boost/config/stdlib/dinkumware.hpp
index aa214fc1..c35873fe 100644
--- a/include/boost/config/stdlib/dinkumware.hpp
+++ b/include/boost/config/stdlib/dinkumware.hpp
@@ -12,7 +12,7 @@
 //  Dinkumware standard library config:
 
 #if !defined(_YVALS) && !defined(_CPPLIB_VER)
-#include <utility>
+#include <iosfwd>
 #if !defined(_YVALS) && !defined(_CPPLIB_VER)
 #error This is not the Dinkumware lib!
 #endif
diff --git a/include/boost/config/stdlib/libcomo.hpp b/include/boost/config/stdlib/libcomo.hpp
index b2c8e440..7eeae7ee 100644
--- a/include/boost/config/stdlib/libcomo.hpp
+++ b/include/boost/config/stdlib/libcomo.hpp
@@ -10,7 +10,7 @@
 //  Comeau STL:
 
 #if !defined(__LIBCOMO__)
-#  include <utility>
+#  include <iosfwd>
 #  if !defined(__LIBCOMO__)
 #      error "This is not the Comeau STL!"
 #  endif
diff --git a/include/boost/config/stdlib/modena.hpp b/include/boost/config/stdlib/modena.hpp
index 61e31b7d..68c42eff 100644
--- a/include/boost/config/stdlib/modena.hpp
+++ b/include/boost/config/stdlib/modena.hpp
@@ -8,7 +8,7 @@
 //  Modena C++ standard library (comes with KAI C++)
 
 #if !defined(MSIPL_COMPILE_H)
-#  include <utility>
+#  include <iosfwd>
 #  if !defined(__MSIPL_COMPILE_H)
 #      error "This is not the Modena C++ library!"
 #  endif
diff --git a/include/boost/config/stdlib/msl.hpp b/include/boost/config/stdlib/msl.hpp
index 0df8e0e3..7e090d0f 100644
--- a/include/boost/config/stdlib/msl.hpp
+++ b/include/boost/config/stdlib/msl.hpp
@@ -9,7 +9,7 @@
 //  Metrowerks standard library:
 
 #ifndef __MSL_CPP__
-#  include <utility>
+#  include <iosfwd>
 #  ifndef __MSL_CPP__
 #     error This is not the MSL standard library!
 #  endif
diff --git a/include/boost/config/stdlib/roguewave.hpp b/include/boost/config/stdlib/roguewave.hpp
index b331f653..329132a8 100644
--- a/include/boost/config/stdlib/roguewave.hpp
+++ b/include/boost/config/stdlib/roguewave.hpp
@@ -10,7 +10,7 @@
 //  Rogue Wave std lib:
 
 #if !defined(__STD_RWCOMPILER_H__) && !defined(_RWSTD_VER)
-#  include <utility>
+#  include <iosfwd>
 #  if !defined(__STD_RWCOMPILER_H__) && !defined(_RWSTD_VER)
 #     error This is not the Rogue Wave standard library
 #  endif
diff --git a/include/boost/config/stdlib/sgi.hpp b/include/boost/config/stdlib/sgi.hpp
index 67f7a0a4..7cc52da7 100644
--- a/include/boost/config/stdlib/sgi.hpp
+++ b/include/boost/config/stdlib/sgi.hpp
@@ -10,7 +10,7 @@
 //  generic SGI STL:
 
 #if !defined(__STL_CONFIG_H)
-#  include <utility>
+#  include <iosfwd>
 #  if !defined(__STL_CONFIG_H)
 #      error "This is not the SGI STL!"
 #  endif
diff --git a/include/boost/config/stdlib/stlport.hpp b/include/boost/config/stdlib/stlport.hpp
index 294f96ed..684c58d2 100644
--- a/include/boost/config/stdlib/stlport.hpp
+++ b/include/boost/config/stdlib/stlport.hpp
@@ -10,7 +10,7 @@
 //  STLPort standard library config:
 
 #if !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
-#  include <utility>
+#  include <iosfwd>
 #  if !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
 #      error "This is not STLPort!"
 #  endif
diff --git a/include/boost/config/suffix.hpp b/include/boost/config/suffix.hpp
index 5f0ada25..3ecbd043 100644
--- a/include/boost/config/suffix.hpp
+++ b/include/boost/config/suffix.hpp
@@ -243,6 +243,12 @@
 //
 #  if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901)
 #     define BOOST_HAS_STDINT_H
+#     ifndef BOOST_HAS_LOG1P
+#        define BOOST_HAS_LOG1P
+#     endif
+#     ifndef BOOST_HAS_EXPM1
+#        define BOOST_HAS_EXPM1
+#     endif
 #  endif
 
 //
@@ -538,3 +544,4 @@ namespace boost{
 
 
 
+