Gdb error after following debug adapter installation wiki

[thomascookandroid]

Debug adapter definition and debug configuration

return {
    "mfussenegger/nvim-dap",
    dependencies = {
        "rcarriga/nvim-dap-ui",
        "nvim-neotest/nvim-nio"
    },
    config = function ()
        local nvim_dap = require("dap")
        local nvim_dap_ui = require("dapui")
        nvim_dap_ui.setup()
        nvim_dap.listeners.before.attach.dapui_config = function ()
            nvim_dap_ui.open()
        end
        nvim_dap.listeners.before.launch.dapui_config = function ()
            nvim_dap_ui.open()
        end
        nvim_dap.listeners.before.event_terminated.dapui_config = function ()
            nvim_dap_ui.close()
        end
        nvim_dap.listeners.before.event_exited.dapui_config = function ()
            nvim_dap_ui.close()
        end
        nvim_dap.adapters.gdb = {
            type = "executable",
            command = "gdb",
            args = {
                "--interpreter=dap",
                "--eval-commmand",
                "set logging enabled on"
            }
        }
        nvim_dap.configurations.c = {
            {
                name = "Launch",
                type = "gdb",
                request = "launch",
                cwd = "${workspaceFolder}",
                program = function ()
                    return vim.fn.input(
                        "Path to executable: ",
                        vim.fn.getcwd() .. "/bin/",
                        "file"
                    )
                end,
                stopAtBeginningOfMainSubprogram = false
            }
        }
    end
}

Debug adapter version

Not sure how to determine

Steps to Reproduce

1. Install gdb 15.1
2. Write some simple hello world C program:

   
   #include <stdio.h>

int main(void) { printf("To C, or not to C: that is the question.\n"); return 0; }

3. Run `DapToggleBreakpoint` to set a breakpoint on a line in the c code
4. Compile the c code: `gcc -o bin/pun pun.c`
5. Run `DapContinue` and point it at the executable
6. Observe error `gdb exited with code: 1`

### Expected Result

Following the debug adapter wiki, which tells user to use gdb 14.0+ should not result in an error

### Actual Result

Following the debug adapter wiki, which tells user to use gdb 14.0+ results in an error: `gdb exited with code: 1`

[mfussenegger]

Check the logs and make sure you're using a gdb variant that includes dap support. Some distributions strip it out.

[thomascookandroid]

I have just built gdb 14.1 from source. That has DAP support, and yet this issue persists. In addition, no log file is getting generated in the working directory, even though I supply "--eval-command=set logging enabled", so I have no way to provide further information.

Is there any advice you can give me on how to proceed?

[thomascookandroid]

gdb --ver
GNU gdb (GDB) 14.1

[thomascookandroid]

I found the nvim-dap logs which shows that there was an error:

[ ERROR ] 2024-08-08T11:43:13Z+0100 ] ...omas/.local/share/nvim/lazy/nvim-dap/lua/dap/session.lua:1466 ]    "stderr"    {
  args = { "--interpreter=dap", "--eval-command=set logging enabled on" },
  command = "gdb",
  type = "executable"
}   "Interpreter `dap' unrecognized\n"

The error is stating that gdb is reporting Interpreter 'dap' unrecognised....

Does this mean the gdb variant I have made from source and installed does not support DAP? From all the reading I have done, 14.1 was the version of gdb that actually added DAP support...

Please advise

[mfussenegger]

The error is stating that gdb is reporting Interpreter 'dap' unrecognised....

Does this mean the gdb variant I have made from source and installed does not support DAP?

Yes that's what it means

From all the reading I have done, 14.1 was the version of gdb that actually added DAP support...

It added DAP support but the feature is optional and can be excluded. You need to make sure to use a build that includes it.

[thomascookandroid]

I see, apologies. Should have RTFM