Re: c++filt causing flashing console windows

[Ranjit Mathew <rmathew at hotmail dot com>]

Andrew Haley wrote:
> Øyvind Harboe writes:
>  > > > -Dgnu.gcj.runtime.NameFinder.demangle=false
>  > > > -Dgnu.gcj.runtime.NameFinder.use_addr2line=false
>  > >
>  > >Surely the bug is not here.  exec'ing c++filt and addr2line 
>  > >should not cause anything to flash, and that is the bug.
>  > 
>  > Flashing isn't a very accurate technical term, I guess. :-)
>  > 
>  > When a GCJ application compiled with w/-mwindows
>  > launches a console application (e.g. addr2line), a console
>  > window is created for that application.
> 
> But addr2line isn't a console application; it simply writes to stdout.

It is - and so is c++filt. The "console" part
refers not to a GUI console but to something
more like a dumb TTY.

The "console" is what gives the application the
standard stdout, stderr and stdin streams. If
an application does not use these streams and
gets its input from elsewhere (GUI events), then
it can be compiled with "-mwindows" (on MinGW)
to omit the Command Prompt window that would
be shown otherwise.

If a GUI application spawns a console application,
Windows will launch the application with an
attached console (a Command Prompt window).

The "java" and "javaw" versions of the Java
interpreter in the standard JRE are the console
and non-console versions respectively.

More information:

http://msdn.microsoft.com/library/en-us/dllproc/base/creation_of_a_console.asp

Ranjit.

-- 
Ranjit Mathew          Email: rmathew AT hotmail DOT com

Bangalore, INDIA.      Web: http://ranjitmathew.tripod.com/