--- boost_1_57_0/boost/config/platform/cygwin.hpp	2015-05-04 18:02:21.742811600 -0500
+++ boost_1_57_0/boost/config/platform/cygwin.hpp	2015-05-04 17:16:30.183407900 -0500
@@ -39,18 +39,8 @@
 #define BOOST_HAS_STDINT_H
 #endif
 
-/// Cygwin has no fenv.h
-#define BOOST_NO_FENV_H
-
 // boilerplate code:
 #include <boost/config/posix_features.hpp>
-
-//
-// Cygwin lies about XSI conformance, there is no nl_types.h:
-//
-#ifdef BOOST_HAS_NL_TYPES_H
-#  undef BOOST_HAS_NL_TYPES_H
-#endif
  
 
 
--- boost_1_57_0/boost/config/stdlib/libstdcpp3.hpp	2014-10-26 07:36:42.000000000 -0500
+++ boost_1_57_0/boost/config/stdlib/libstdcpp3.hpp	2015-05-04 17:54:44.835791700 -0500
@@ -68,7 +68,7 @@
 #endif
 
 // Apple doesn't seem to reliably defined a *unix* macro
-#if !defined(CYGWIN) && (  defined(__unix__)  \
+#if (  defined(__unix__)  \
                         || defined(__unix)    \
                         || defined(unix)      \
                         || defined(__APPLE__) \
--- boost_1_57_0/boost/config/stdlib/sgi.hpp	2014-10-26 07:36:42.000000000 -0500
+++ boost_1_57_0/boost/config/stdlib/sgi.hpp	2015-05-04 17:54:52.911817300 -0500
@@ -41,7 +41,7 @@
 #endif
 
 // Apple doesn't seem to reliably defined a *unix* macro
-#if !defined(CYGWIN) && (  defined(__unix__)  \
+#if (  defined(__unix__)  \
                         || defined(__unix)    \
                         || defined(unix)      \
                         || defined(__APPLE__) \
--- boost_1_57_0/boost/config/stdlib/stlport.hpp	2014-10-26 07:36:42.000000000 -0500
+++ boost_1_57_0/boost/config/stdlib/stlport.hpp	2015-05-04 17:55:00.621796300 -0500
@@ -17,7 +17,7 @@
 #endif
 
 // Apple doesn't seem to reliably defined a *unix* macro
-#if !defined(CYGWIN) && (  defined(__unix__)  \
+#if (  defined(__unix__)  \
                         || defined(__unix)    \
                         || defined(unix)      \
                         || defined(__APPLE__) \
--- boost_1_57_0/boost/config/stdlib/vacpp.hpp	2014-10-26 07:36:42.000000000 -0500
+++ boost_1_57_0/boost/config/stdlib/vacpp.hpp	2015-05-04 17:55:07.424660200 -0500
@@ -13,7 +13,7 @@
 #define BOOST_NO_STD_MESSAGES
 
 // Apple doesn't seem to reliably defined a *unix* macro
-#if !defined(CYGWIN) && (  defined(__unix__)  \
+#if (  defined(__unix__)  \
                         || defined(__unix)    \
                         || defined(unix)      \
                         || defined(__APPLE__) \
--- boost_1_57_0/boost/predef/os/cygwin.h	2014-07-10 08:53:53.000000000 -0500
+++ boost_1_57_0/boost/predef/os/cygwin.h	2015-05-04 17:57:31.634472500 -0500
@@ -29,7 +29,7 @@ http://www.boost.org/LICENSE_1_0.txt)
     defined(__CYGWIN__) \
     )
 #   undef BOOST_OS_CYGWIN
-#   define BOOST_OS_CGYWIN BOOST_VERSION_NUMBER_AVAILABLE
+#   define BOOST_OS_CYGWIN BOOST_VERSION_NUMBER_AVAILABLE
 #endif
 
 #if BOOST_OS_CYGWIN