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Merge pull request #14798 from NixOS/devshell-debug

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dev-shell: Set mesonBuildType to debugoptimized
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John Ericson 2025-12-15 19:01:45 +00:00 • committed by GitHub
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9
doc/manual/source/development/debugging.md
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@ -6,14 +6,7 @@ Additionally, see [Testing Nix](./testing.md) for further instructions on how to
## Building Nix with Debug Symbols ## Building Nix with Debug Symbols
In the development shell, set the `mesonBuildType` environment variable to `debug` before configuring the build: In the development shell, `mesonBuildType` is set automatically to `debugoptimized`. This builds Nix with debug symbols, which are essential for effective debugging.
```console
[nix-shell]$ export mesonBuildType=debugoptimized
```
Then, proceed to build Nix as described in [Building Nix](./building.md).
This will build Nix with debug symbols, which are essential for effective debugging.
It is also possible to build without optimization for faster build: It is also possible to build without optimization for faster build:

3
packaging/dev-shell.nix
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@ -258,10 +258,13 @@ pkgs.nixComponents2.nix-util.overrideAttrs (
# We use this shell with the local checkout, not unpackPhase. # We use this shell with the local checkout, not unpackPhase.
src = null; src = null;
# Workaround https://sourceware.org/pipermail/gdb-patches/2025-October/221398.html # Workaround https://sourceware.org/pipermail/gdb-patches/2025-October/221398.html
# Remove when gdb fix is rolled out everywhere. # Remove when gdb fix is rolled out everywhere.
separateDebugInfo = false; separateDebugInfo = false;
mesonBuildType = "debugoptimized";
env = { env = {
# For `make format`, to work without installing pre-commit # For `make format`, to work without installing pre-commit
_NIX_PRE_COMMIT_HOOKS_CONFIG = "${(pkgs.formats.yaml { }).generate "pre-commit-config.yaml" _NIX_PRE_COMMIT_HOOKS_CONFIG = "${(pkgs.formats.yaml { }).generate "pre-commit-config.yaml"