diff options
Diffstat (limited to 'third_party/rust/slab/build.rs')
-rw-r--r-- | third_party/rust/slab/build.rs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/third_party/rust/slab/build.rs b/third_party/rust/slab/build.rs new file mode 100644 index 0000000000..b60351aaf2 --- /dev/null +++ b/third_party/rust/slab/build.rs @@ -0,0 +1,24 @@ +fn main() { + let cfg = match autocfg::AutoCfg::new() { + Ok(cfg) => cfg, + Err(e) => { + // If we couldn't detect the compiler version and features, just + // print a warning. This isn't a fatal error: we can still build + // Slab, we just can't enable cfgs automatically. + println!( + "cargo:warning=slab: failed to detect compiler features: {}", + e + ); + return; + } + }; + // Note that this is `no_`*, not `has_*`. This allows treating as the latest + // stable rustc is used when the build script doesn't run. This is useful + // for non-cargo build systems that don't run the build script. + if !cfg.probe_rustc_version(1, 39) { + println!("cargo:rustc-cfg=slab_no_const_vec_new"); + } + if !cfg.probe_rustc_version(1, 46) { + println!("cargo:rustc-cfg=slab_no_track_caller"); + } +} |