These warnings and errors were found using gcc 6.1 (64-bit) under Windows.
The error in examples/howto-add_fd-and-popen.cxx (-fpermissive) is due
to the wrong definition of Fl_FD_Handler under Windows 64-bit (FL_SOCKET!).
This should really be fixed in a better way in FLTK 1.4.
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11871 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
as noted by Albrecht on fltk.coredev today;
was giving warnings with Windows/MinGW builds.
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10319 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
