check for existence of posix_fadvise()

File.cpp

@@ -13,10 +13,6 @@
 #include "xml/File.h"
 #include "xml/NamedEnts.h"
 
-#ifndef POSIX_FADV_SEQUENTIAL
-#define POSIX_FADV_SEQUENTIAL 2
-#endif
-
 using namespace xml;
 
 // _____________________________________________________________________________
@@ -47,7 +43,9 @@ void File::reset() {
   if (_file) close(_file);
   _file = open(_path.c_str(), O_RDONLY);
   if (_file < 0) throw XmlFileException(std::string("could not open ") + _path);
+#ifdef __unix__
   posix_fadvise(_file, 0, 0, POSIX_FADV_SEQUENTIAL);
+#endif
 
   _lastBytes = read(_file, _buffer[_which], BUFFER_S);
   _lastNewData = _lastBytes;