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Asked: 2026-05-10T20:51:22+00:00

I’m trying to use GDB to debug (to find an annoying segfault). When I

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I’m trying to use GDB to debug (to find an annoying segfault). When I run:

gdb ./filename

from the command line, I get the following error:

This GDB was configured as 'i686-pc-linux- gnu'...'/path/exec': not in executable  format: File format not recognized

When I execute:

file /path/executable/

I get the following info:

 ELF 64-bit LSB executable, AMD x86-64,  version 1 (SYSV), for GNU/Linux 2.4.0,   dynamically linked (uses shared libs), not stripped

I am using GDB 6.1, and the executable is compiled with gcc version 3.4.6.

I’m a little out of my water in terms of using gdb, but as far as I can tell it should be working in this instance. Any ideas what’s going wrong?

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1 Answer

  1. The executable is 64-bit (x86-64) and the debugger is a 32 bit (i686-pc-linux) build. You may need to install a 64-bit (x86-64) version of the debugger.

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