hurd: Fix build from missing fpos_t

tgross35 · tgross35 · commit 72f49c99656e · 2025-06-02T05:37:38.000Z
In 872642a ("gnu: Add proper structs for fpos_t and fpos64_t"), `fpos_t` was changed from an opaque struct to one with a definition on Linux GNU, with the Unix fallback configured as for targets without a GNU `target_env`. However, GNU hurd matches `target_env = "gnu"`, but doesn't have a `fpos` implementation. Fix the build by adjusting the fallback `cfg` to be more specific. Eventually we probably want the same definition on Hurd as on Linux.
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
@@ -567,7 +567,7 @@ cfg_if! {
 }
 
 cfg_if! {
-    if #[cfg(not(target_env = "gnu"))] {
+    if #[cfg(not(all(target_os = "linux", target_env = "gnu")))] {
         missing! {
             #[cfg_attr(feature = "extra_traits", derive(Debug))]
             pub enum fpos_t {} // FIXME(unix): fill this out with a struct

Original file line number	Diff line number	Diff line change
`@@ -567,7 +567,7 @@ cfg_if! {`
`567`	`567`	`}`
`568`	`568`
`569`	`569`	`cfg_if! {`
`570`		`- if #[cfg(not(target_env = "gnu"))] {`
	`570`	`+ if #[cfg(not(all(target_os = "linux", target_env = "gnu")))] {`
`571`	`571`	`missing! {`
`572`	`572`	`#[cfg_attr(feature = "extra_traits", derive(Debug))]`
`573`	`573`	`pub enum fpos_t {} // FIXME(unix): fill this out with a struct`