24 lines
928 B
Rust
24 lines
928 B
Rust
fn main() {
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let cfg = match autocfg::AutoCfg::new() {
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Ok(cfg) => cfg,
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Err(e) => {
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// If we couldn't detect the compiler version and features, just
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// print a warning. This isn't a fatal error: we can still build
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// Slab, we just can't enable cfgs automatically.
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println!(
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"cargo:warning=slab: failed to detect compiler features: {}",
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e
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);
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return;
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}
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};
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// Note that this is `no_`*, not `has_*`. This allows treating as the latest
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// stable rustc is used when the build script doesn't run. This is useful
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// for non-cargo build systems that don't run the build script.
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if !cfg.probe_rustc_version(1, 39) {
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println!("cargo:rustc-cfg=slab_no_const_vec_new");
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}
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if !cfg.probe_rustc_version(1, 46) {
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println!("cargo:rustc-cfg=slab_no_track_caller");
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}
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}
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