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rust: build: generate lint flags from Cargo.toml

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Cargo.toml makes it possible to describe the desired lint level settings
in a nice format.  We can extend this to Meson-built crates, by teaching
rustc_args.py to fetch lint and --check-cfg arguments from Cargo.toml.
--check-cfg arguments come from the unexpected_cfgs lint as well as crate
features

Start with qemu-api, since it already has a [lints.rust] table and
an invocation of rustc_args.py.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2024-11-07 10:02:15 +01:00
parent 1de82059aa
commit 97ed1e9c8e
3 changed files with 86 additions and 4 deletions
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4
rust/qemu-api/meson.build
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@ -1,6 +1,6 @@
_qemu_api_cfg = run_command(rustc_args,
'--config-headers', config_host_h, files('Cargo.toml'),
capture: true, check: true).stdout().strip().split()
'--config-headers', config_host_h, '--features', '--lints', files('Cargo.toml'),
capture: true, check: true).stdout().strip().splitlines()
# _qemu_api_cfg += ['--cfg', 'feature="allocator"']
if rustc.version().version_compare('>=1.77.0')