local.mk:5: warning: overriding recipe for target 'outputs/dev/include/nix/nix_api_expr.h'
local.mk:5: warning: ignoring old recipe for target 'outputs/dev/include/nix/nix_api_expr.h'
local.mk:5: warning: overriding recipe for target 'outputs/dev/include/nix/nix_api_external.h'
local.mk:5: warning: ignoring old recipe for target 'outputs/dev/include/nix/nix_api_external.h'
local.mk:5: warning: overriding recipe for target 'outputs/dev/include/nix/nix_api_value.h'
local.mk:5: warning: ignoring old recipe for target 'outputs/dev/include/nix/nix_api_value.h'
local.mk:5: warning: overriding recipe for target 'outputs/dev/include/nix/nix_api_store.h'
local.mk:5: warning: ignoring old recipe for target 'outputs/dev/include/nix/nix_api_store.h'
local.mk:5: warning: overriding recipe for target 'outputs/dev/include/nix/nix_api_util.h'
local.mk:5: warning: ignoring old recipe for target 'outputs/dev/include/nix/nix_api_util.h'
See https://github.com/NixOS/nix/pull/8699#discussion_r1554312181
Casting a function pointer to `void*` is undefined behavior in the C
spec, since there are platforms with different sizes for these two kinds
of pointers. A safe alternative might be `void (*callback)()`
* add intermediate variables and clarifying comments
Co-authored-by: Alexander Groleau <alex@proof.construction>
Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
https://github.com/NixOS/nix/pull/10456 fixed the addition of symlink
store paths to the sandbox, but also made it so that the hardcoded
sandbox paths (like `/etc/hosts`) were now bind-mounted without
following the possible symlinks. This made these files unreadable if
there were symlinks (because the sandbox would now contain a symlink to
an unreachable file rather than the underlying file).
In particular, this broke FOD derivations on NixOS as `/etc/hosts` is a
symlink there.
Fix that by canonicalizing all these hardcoded sandbox paths before
adding them to the sandbox.
Like always declining; local builds only, as can be inferred from the
docs. (Not worth spending too many words on this pretty obvious
behavior, I think. Also, plans to remove it? https://github.com/NixOS/nix/issues/1221)
This requires moving resolveSymlinks() into SourceAccessor. Also, it
requires LocalStoreAccessor::maybeLstat() to work on parents of the
store (to avoid an error like "/nix is not in the store").
Fixes#10375.
