mv std libs to library/

library/unwind/src/lib.rs

@@ -0,0 +1,52 @@
+#![no_std]
+#![unstable(feature = "panic_unwind", issue = "32837")]
+#![feature(link_cfg)]
+#![feature(nll)]
+#![feature(staged_api)]
+#![feature(unwind_attributes)]
+#![feature(static_nobundle)]
+#![cfg_attr(not(target_env = "msvc"), feature(libc))]
+
+cfg_if::cfg_if! {
+    if #[cfg(target_env = "msvc")] {
+        // Windows MSVC no extra unwinder support needed
+    } else if #[cfg(any(
+        target_os = "l4re",
+        target_os = "none",
+    ))] {
+        // These "unix" family members do not have unwinder.
+        // Note this also matches x86_64-linux-kernel.
+    } else if #[cfg(any(
+        unix,
+        windows,
+        target_os = "cloudabi",
+        all(target_vendor = "fortanix", target_env = "sgx"),
+    ))] {
+        mod libunwind;
+        pub use libunwind::*;
+    } else {
+        // no unwinder on the system!
+        // - wasm32 (not emscripten, which is "unix" family)
+        // - os=none ("bare metal" targets)
+        // - os=hermit
+        // - os=uefi
+        // - os=cuda
+        // - nvptx64-nvidia-cuda
+        // - mipsel-sony-psp
+        // - Any new targets not listed above.
+    }
+}
+
+#[cfg(target_env = "musl")]
+#[link(name = "unwind", kind = "static", cfg(target_feature = "crt-static"))]
+#[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
+extern "C" {}
+
+#[cfg(target_os = "redox")]
+#[link(name = "gcc_eh", kind = "static-nobundle", cfg(target_feature = "crt-static"))]
+#[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
+extern "C" {}
+
+#[cfg(all(target_vendor = "fortanix", target_env = "sgx"))]
+#[link(name = "unwind", kind = "static-nobundle")]
+extern "C" {}