Clang on Solarized Sublime Sekai

My Neovim DAP Setup for C Debugging (2)

Mon, 17 Aug 2026 00:28:09 +0200

Background

Inconveniences with the current setup

I was using Neovim DAP with GDB for C debugging. Here’re some inconveniences during the debug process:

needed fflush(0) for displaying standard output in the REPL (the small buffer below)

Gemini’s suggested solutions for obtaining standard input sounded too complicated, like:

attaching GDB to an external TTY, or

from a certain file

dap.configurations.c = {
  {
    name = "Launch with File Input Redirection",
    type = "gdb", -- or codelldb
    request = "launch",
    program = function()
      return vim.fn.input("Path to executable: ", vim.fn.getcwd() .. "/", "file")
    end,
    cwd = "${workspaceFolder}",
    args = { "<", "input.txt" }, -- Passes input.txt as standard input
  },
}

Popularity of an alternative compiler

AI Learning Club’s C course’s introduction says that Clang often offers a quicker compilation and more informative error messages. As a result, I was feeling motivated to connect Neovim DAP to LLDB instead.