Index: boost/config/compiler/visualc.hpp
===================================================================
--- boost/config/compiler/visualc.hpp	(revision 85866)
+++ boost/config/compiler/visualc.hpp	(working copy)
@@ -101,6 +101,12 @@
 #  define BOOST_HAS_GETSYSTEMTIMEASFILETIME
 #endif
 
+// disable some API for WinRT applications 
+#ifdef BOOST_FOR_WINRT
+//WinRT applications don't have a notion of environment variables and getenv implementation
+#define BOOST_NO_GETENV
+#endif
+
 //
 // check for exception handling support:
 #if !defined(_CPPUNWIND) && !defined(BOOST_NO_EXCEPTIONS)
Index: libs/locale/src/util/default_locale.cpp
===================================================================
--- libs/locale/src/util/default_locale.cpp	(revision 85866)
+++ libs/locale/src/util/default_locale.cpp	(working copy)
@@ -29,6 +29,8 @@
             std::string get_system_locale(bool use_utf8)
             {
                 char const *lang = 0;
+                
+                #ifndef BOOST_NO_GETENV
                 if(!lang || !*lang)
                     lang = getenv("LC_CTYPE");
                 if(!lang || !*lang)
@@ -35,6 +37,7 @@
                     lang = getenv("LC_ALL");
                 if(!lang || !*lang)
                     lang = getenv("LANG");
+                #endif
                 #ifndef BOOST_LOCALE_USE_WIN32_API
                 (void)use_utf8; // not relevant for non-windows
                 if(!lang || !*lang)