MAINT-2850 Fix for linux build

indra/llcommon/llsys.cpp

@@ -218,6 +218,7 @@ static bool regex_search_no_exc(const S& string, M& match, const R& regex)
     }
 }
 
+#if LL_WINDOWS
 // GetVersionEx should not works correct with Windows 8.1 and the later version. We need to check this case 
 static bool	check_for_version(WORD wMajorVersion, WORD wMinorVersion, WORD wServicePackMajor)
 {
@@ -235,6 +236,7 @@ static bool	check_for_version(WORD wMajorVersion, WORD wMinorVersion, WORD wServ
 
     return VerifyVersionInfoW(&osvi, VER_MAJORVERSION | VER_MINORVERSION | VER_SERVICEPACKMAJOR, dwlConditionMask) != FALSE;
 }
+#endif
 
 
 LLOSInfo::LLOSInfo() :