Add note to build.rs

taiki-e · Aug 31, 2020 · 4d290fd · 4d290fd
1 parent b5a423a
commit 4d290fd
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/build.rs b/build.rs
@@ -1,5 +1,8 @@
 use std::{env, fs, path::PathBuf};
 
+// The rustc-cfg strings below are *not* public API. Please let us know by
+// opening a GitHub issue if your build environment requires some way to enable
+// these cfgs other than by executing our build script.
 fn main() {
     println!("cargo:rustc-cfg=const_fn_has_build_script");