use std :: env ; use std :: fs :: File ; use std :: io :: Write ; use std :: path :: PathBuf ; fn main ( ) { if env :: var_os ( "CARGO_FEATURE_RT" ) . is_some ( ) { let out = & PathBuf :: from ( env :: var_os ( "OUT_DIR" ) . unwrap ( ) ) ; File :: create ( out . join ( "device.x" ) ) . unwrap ( ) . write_all ( include_bytes ! ( "device.x" ) ) . unwrap ( ) ; println ! ( "cargo:rustc-link-search={}" , out . display ( ) ) ; println ! ( "cargo:rerun-if-changed=device.x" ) ; } println ! ( "cargo:rerun-if-changed=build.rs" ) ; }