provide -mwindows option like gcc

[jvl]

provide a command line option -mwindows (aka main windows) to compile and link the code as a windows executable (i.e. WinMain?). This is mearly a matter of passing through the option to gcc and would be trivial to implement. see #2459 for full discussion.

Why Bother ?

To enahnce "User Friendliness" and encourage gui users on win32 aka wxHaskell and Gtk2Hs users to produce application with "Native" look and feel.

[duncan]

Of course one can already use -optl-mwindows which is what the Gtk2Hs FAQ has been recommending for the past couple years.

If we want to make it really user friendly we should deal with the issue that when in -mwindows mode, reading from stdin or writing to stdout/stderr causes an exception.