Release bitflags 1.2.1 rust crate
Fetched with get.rust.pkg and Android.bp generated with
cargo2android.py.
Change-Id: I302ab0359d3688dbc83e9d1eb7a26364e3bae726
(cherry picked from commit 8729341d8fc2cba6809c171e09017262e6acdb60)
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..985757a
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,44 @@
+use std::env;
+use std::process::Command;
+use std::str::{self, FromStr};
+
+fn main(){
+ let minor = match rustc_minor_version() {
+ Some(minor) => minor,
+ None => return,
+ };
+
+ // const fn stabilized in Rust 1.31:
+ if minor >= 31 {
+ println!("cargo:rustc-cfg=bitflags_const_fn");
+ }
+}
+
+fn rustc_minor_version() -> Option<u32> {
+ let rustc = match env::var_os("RUSTC") {
+ Some(rustc) => rustc,
+ None => return None,
+ };
+
+ let output = match Command::new(rustc).arg("--version").output() {
+ Ok(output) => output,
+ Err(_) => return None,
+ };
+
+ let version = match str::from_utf8(&output.stdout) {
+ Ok(version) => version,
+ Err(_) => return None,
+ };
+
+ let mut pieces = version.split('.');
+ if pieces.next() != Some("rustc 1") {
+ return None;
+ }
+
+ let next = match pieces.next() {
+ Some(next) => next,
+ None => return None,
+ };
+
+ u32::from_str(next).ok()
+}
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