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I am debugging a program that outputs 8 or more lines of display and requires input. So my IO window has to be say 10 rows or so in height. But I also want to see the source code AND of course the gdb input window.

What is the easiest way to present this? To have 3 windows? 1 for gdb, 1 for console and the other for the source code? If so how do I get 3 windows?

Or if I could somehow get the gdb io window to be a separate console window that might be even better.

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  • Do you want to split your Emacs frame into multiple windows? There's C-x 2 and C-x 3. You can adjust window sizes with C-x {, C-x }, C-x ^ and C-x -. You can also have multiple Emacs frames connected to the same Emacs instance.
    – user12563
    Sep 22 '18 at 13:43
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For anyone else's benefit, you can use gdb-many-windows like:

  1. Compile your executable (don't forget to compile with the -g flag).
  2. m-x gdb
  3. m-x gdb-many-windows

You then get the same sort of environment as you would find in developer IDE's.

Some links: https://www.gnu.org/software/emacs/manual/html_node/emacs/GDB-User-Interface-Layout.html https://undo.io/resources/gdb-watchpoint/using-gdb-emacs/

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To create a new console window you can do C-x 5 b with an existing buffer or C-x 5 f to open a file. To switch between the different consoles you can do C-x 5 o You can then split each of the consoles into different frames horizontally by C-x 2 or vertically by C-x 3

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  • C-x 5 b, like C-x b and C-x 4 b, is not just for an existing buffer. It's also for creating a new buffer.
    – Drew
    Sep 16 '20 at 1:51

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