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Date:	Sat, 21 Mar 2009 16:19:00 +0100
From:	Christian Franke <Christian DOT Franke AT t-online DOT de>
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Subject:	Re: Any Cygwin tool to change .exe subsystem type ?
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Charles Wilson wrote:
> Dave Korn wrote:
>   
>> Christian Franke wrote:
>>     
>>> Is there any tool in the Cygwin distro that allows to change subsystem
>>> type (Console, GUI, ...) of an already linked .exe ?
>>>
>>> Same operation as e.g. 'editbin /subsystem:windows ...', but without the
>>> need to have MS tools installed.
>>>
>>>       
>>   Not yet, but it would make a great PTC for the new 'peflags' tool recently
>> discussed on this list.
>>     
>
>   

If desired, I can later provide a patch that adds some 'peflags 
--subsystem=...'.


For now, I use a quick hack within the project's Makefile.
It first checks the header magic number and then:

$ echo -ne '\002\000' | dd bs=1 count=2 seek=220 conv=notrunc of=file.exe

:-)

This works because apparently all cygwin and mingw compiled .exe have 
the optional header at the same position.


> Actually, I think THIS functionality, as well as the ability to set the
> date field of a PE object as recently mentioned on the gcc list, is a
> better fit for objdump.

I agree, but shouldn't this be a function of objcopy ?

-- 
Christian Franke


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