Auto merge of #2848 - Bryanskiy:android-crt-static, r=Amanieu

add crt-static for android

Author: bors

src/lib.rs

@@ -26,10 +26,6 @@
 #![deny(missing_copy_implementations, safe_packed_borrows)]
 #![cfg_attr(not(feature = "rustc-dep-of-std"), no_std)]
 #![cfg_attr(feature = "rustc-dep-of-std", no_core)]
-#![cfg_attr(
-    feature = "rustc-dep-of-std",
-    feature(native_link_modifiers, native_link_modifiers_bundle)
-)]
 #![cfg_attr(libc_const_extern_fn_unstable, feature(const_extern_fn))]
 
 #[macro_use]

src/unix/mod.rs

@@ -346,6 +346,14 @@ cfg_if! {
     } else if #[cfg(target_os = "emscripten")] {
         #[link(name = "c")]
         extern {}
+    } else if #[cfg(all(target_os = "android", feature = "rustc-dep-of-std"))] {
+        #[link(name = "c", kind = "static", modifiers = "-bundle",
+            cfg(target_feature = "crt-static"))]
+        #[link(name = "m", kind = "static", modifiers = "-bundle",
+            cfg(target_feature = "crt-static"))]
+        #[link(name = "m", cfg(not(target_feature = "crt-static")))]
+        #[link(name = "c", cfg(not(target_feature = "crt-static")))]
+        extern {}
     } else if #[cfg(any(target_os = "macos",
                         target_os = "ios",
                         target_os = "watchos",