Motivation for this change

Utility for changing default thread stack size
(via PT_GNU_STACK program header)
as supported by musl 1.1.21+.

patchelf for default thread stack size :).

This makes it possible to use a larger value
without changing the source, which is preferred
but may be awkward or otherwise undesirable in some cases.

The value can also be set via LDFLAGS with some linkers,
such as with GNU ld using "-Wl,-z,stack-size=N".

See:
https://git.musl-libc.org/cgit/musl/commit/?id=7b3348a98c139b4b4238384e52d4b0eb237e4833

(promoting from my NUR repo, FWIW)

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Assured whether relevant documentation is up to date
• Fits CONTRIBUTING.md.