Re: [Qemu-devel] [PATCH] w32: QEMU applications with SDL are always GUI applications

[TeLeMan]

On Sat, Dec 17, 2011 at 07:12, Stefan Weil <address@hidden> wrote:
> Am 16.12.2011 04:24, schrieb TeLeMan:
>
>> On Sun, Dec 4, 2011 at 05:32, Stefan Weil <address@hidden> wrote:
>>>
>>> Since commit 1d14ffa97eacd3cb722271eaf6f093038396eac4 (in 2005),
>>> QEMU applications on W32 don't use the default SDL compiler flags:
>>>
>>> Instead of a GUI application, a console application is created.
>>>
>>> This has disadvantages (there is always an empty console window) and
>>> no obvious reason, so this patch removes the strange flag modification.
>>>
>>> The SDL GUI applications still can be run from a console window
>>> and even send stdout and stderr to that console by setting environment
>>> variable SDL_STDIO_REDIRECT=no.
>>
>> Did you test it? Windows GUI applications can not send stdout to the
>> startup console window unless they create their own console window.
>
>
> I did, but obviously not good enough:
>
> in an msys rxvt console the QEMU executables work as I wrote
> in the commit message. So msys-rxvt and some other applications
> (SciTE for example) allow running GUI applications with
> stdio channels.
>
> The Windows command prompt (cmd.exe) is different, and so is
> the normal MSYS console. Here console output does not work,
> and I also noticed problems when running an emulation with
> latest QEMU (application hangs).
>
> It seems to be difficult to get a solution which works for
> several scenarios:
>
> * It should be possible to create a link which starts
>  an emulation with parameters and only one window (SDL,
>  no extra console window). This needs a GUI application
>  (or is it possible for a console application to suppress
>  or close the console window?).
>
> * It must be possible to see stdout and stderr output.
>  Default today: both are written to files in the program
>  directory. This is bad because normally users have no
>  write access there. It also does not allow running
>  more than one emulation with separated output.
>
> * It should be possible to get stdout and stderr directly
>  to the console. This is needed for running with curses,
>  and it is useful when asking for -help.
>
> * It must be possible to run QEMU executables from cmd.exe.
>
> * It should be possible to run QEMU executables from other
>  shells (msys command line, msys rxvt, cygwin command line,
>  ...).
>
> What would you suggest?
Add a configure option and let users decide which one is better.

> Regards,
>
> Stefan Weil
>
>