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From: Jonathan Wakely <jwakely.gcc@gmail.com>
Date: Wed, 6 Oct 2021 09:56:27 +0100
Message-ID: <CAH6eHdSX2NEm63sfPnbqHQrk6_OBX2SOcZ_DH3JOVUf=fmuTRw@mail.gmail.com>
Subject: Re: Why I cannot see content of std::vector in the gdb?
To: unlvsur unlvsur <unlvsur@live.com>
Cc: "unlvsur unlvsur via Libstdc++" <libstdc++@gcc.gnu.org>
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On Wed, 6 Oct 2021 at 03:18, unlvsur unlvsur wrote:
>
> c++ - Inspecting standard container (std::map) contents with gdb - Stack Overflow<https://stackoverflow.com/questions/427589/inspecting-standard-container-stdmap-contents-with-gdb>
>
> I just saw your (jwakely) answer that libstdc++ supports pretty printer for gdb. But it does not work? Any configs I missed here?

That should work, and does work for me.

Obviously your GDB needs to have Python support compiled in. Check
"show auto-load python-scripts" and "info auto-load python-scripts"
and see what it prints out.

See https://sourceware.org/gdb/current/onlinedocs/gdb/Python-Auto_002dloading.html

My ~/.gdbinit has these lines to enable me to load the printers.py
scripts from all my self-installed GCC builds under ~/gcc-version:

add-auto-load-safe-path /home/jwakely/gcc-versions/
add-auto-load-safe-path /home/jwakely/src/gcc/build-x86/gcc/.gdbinit

(The second line is for debugging GCC itself, via the gdb helpers that
are part of the GCC sources).

Note that auto-loading the libstdc++ printers only works for
libstdc++.so and not libstdc++.a, so if you built your gcc with
--disable-shared then you'll need to manually load the printers.