OK, tested with the patch (copied below) and that seems fine - built and worked OK with both the 32 and 64-bit mingw targets.

Went with "get_fileno" for the "replacement" name, as I felt that described what it was doing and would not collide with the macro #define.

I also had to remove the "::" from line 1360 to get this to compile.

diff --git a/fluid/fluid.cxx b/fluid/fluid.cxx

index 0c1647b48..b5e01f316 100644

--- a/fluid/fluid.cxx

+++ b/fluid/fluid.cxx

@@ -1353,11 +1353,11 @@ public:

   // returns fileno(FILE*):

   // (file must be open, i.e. _fpt must be non-null)

   // *FIXME* we should find a better solution for the 'fileno' issue

-  int fileno() const {

+  int get_fileno() const {

 #ifdef _MSC_VER

     return _fileno(_fpt); // suppress MSVC warning

 #else

-    return ::fileno(_fpt);

+    return fileno(_fpt);

 #endif

   } // non null if file is open

 

@@ -1501,7 +1501,7 @@ shell_pipe_cb(FL_SOCKET, void*) {

     shell_run_terminal->append(line);

   } else {

     // End of file; tell the parent...

-    Fl::remove_fd(s_proc.fileno());

+    Fl::remove_fd(s_proc.get_fileno());

     s_proc.close();

     shell_run_terminal->append("... END SHELL COMMAND ...\n");

   }

@@ -1537,7 +1537,7 @@ do_shell_command(Fl_Return_Button*, void*) {

   }

   shell_run_window->show();

 

-  Fl::add_fd(s_proc.fileno(), shell_pipe_cb);

+  Fl::add_fd(s_proc.get_fileno(), shell_pipe_cb);

 

   while (s_proc.desc()) Fl::wait();