From 0acac2cbe306b8db9bc0a7c45f529f1dfa6680c8 Mon Sep 17 00:00:00 2001
From: Thalia Archibald <thalia@archibald.dev>
Date: Wed, 26 Mar 2025 00:38:28 -0700
Subject: [PATCH] std: Fix build for NuttX targets

Fix std build for all NuttX targets. It is the single largest set of
failures on <https://does-it-build.noratrieb.dev/>. Although, ESP-IDF
also requires these same gates, there are other issues for those
targets.

This can verified be running `x check library/std --target=` for all
NuttX targets.
---
 library/std/src/sys/fd/unix.rs                    | 2 ++
 library/std/src/sys/net/connection/socket/unix.rs | 1 +
 2 files changed, 3 insertions(+)

diff --git a/library/std/src/sys/fd/unix.rs b/library/std/src/sys/fd/unix.rs
index 2042ea2c73d00..13fefb4031d08 100644
--- a/library/std/src/sys/fd/unix.rs
+++ b/library/std/src/sys/fd/unix.rs
@@ -71,9 +71,11 @@ const fn max_iov() -> usize {
     target_os = "android",
     target_os = "dragonfly",
     target_os = "emscripten",
+    target_os = "espidf",
     target_os = "freebsd",
     target_os = "linux",
     target_os = "netbsd",
+    target_os = "nuttx",
     target_os = "nto",
     target_os = "openbsd",
     target_os = "horizon",
diff --git a/library/std/src/sys/net/connection/socket/unix.rs b/library/std/src/sys/net/connection/socket/unix.rs
index bbe1e038dccf5..b35d5d2aa8418 100644
--- a/library/std/src/sys/net/connection/socket/unix.rs
+++ b/library/std/src/sys/net/connection/socket/unix.rs
@@ -1,5 +1,6 @@
 use libc::{MSG_PEEK, c_int, c_void, size_t, sockaddr, socklen_t};
 
+#[cfg(not(any(target_os = "espidf", target_os = "nuttx")))]
 use crate::ffi::CStr;
 use crate::io::{self, BorrowedBuf, BorrowedCursor, IoSlice, IoSliceMut};
 use crate::net::{Shutdown, SocketAddr};