--- boost_1_59_0\libs\program_options\src\parsers.cpp	2015-06-08 23:54:19.000000000 -0700
+++ boost_1_59_0/libs/program_options/src/parsers.cpp	2015-08-28 09:51:53.161588300 -0700
@@ -54,11 +54,15 @@
 #if defined(__MWERKS__)
 #include <crtl.h>
 #else
-#if !defined(_WIN32) || defined(__COMO_VERSION__)
+#if defined(__VXWORKS__)
+extern const char** environ;
+#else
+#if !defined(_WIN32) || defined(__COMO_VERSION__) 
 extern char** environ;
 #endif
 #endif
 #endif
+#endif
 
 using namespace std;
 
@@ -190,8 +194,11 @@
                       const function1<std::string, std::string>& name_mapper)
     {
         parsed_options result(&desc);
-        
+#ifdef __VXWORKS__        
+        for(environment_iterator i((char**)environ), e; i != e; ++i) {
+#else
         for(environment_iterator i(environ), e; i != e; ++i) {
+#endif        	
             string option_name = name_mapper(i->first);
 
             if (!option_name.empty()) {