stacktrace, exec amd sys/mman.h are not available in windows

src/mrw/auto.hxx

@@ -13,7 +13,9 @@
 #define __MRW_AUTO_HPP__
 
 #include <sys/types.h> // size_t
-#include <sys/mman.h> // munmap, PROT_READ, MAP_SHARED
+#if !(defined(WIN32) || defined(_WIN32) || defined(__WIN32) || defined(__CYGWIN__))
+#  include <sys/mman.h> // munmap, PROT_READ, MAP_SHARED
+#endif
 #include <unistd.h> // close
 #include <stdexcept>
 #include <cassert>
@@ -374,6 +376,7 @@ namespace mrw {
   */
   typedef mrw::AutoResource<int, int(*)(int), &close, int, -1> AutoFile;
 
+#if !(defined(WIN32) || defined(_WIN32) || defined(__WIN32) || defined(__CYGWIN__))
   /** @brief Resource handle for @c mmap.
       
       It integrates pointer and size of a memory mapped file similar
@@ -445,6 +448,7 @@ namespace mrw {
     /// Forbidden to instanciate.
     Auto(); Auto(const Auto&);
   };
+#endif
   
   //@}
 }