Merge pull request 'std.Io.Threaded: only use spawnDarwin in processReplace when spawning is supported' (#37063) from enfipy/zig:std-threaded-ios-process-replace into master

Reviewed-on: https://codeberg.org/ziglang/zig/pulls/37063
Reviewed-by: Jacob Young <jacobly@ziglang.org>

lib/std/Io/Threaded.zig

@@ -354,7 +354,7 @@ pub const NullFile = switch (native_os) {
             }
         }
     },
-    .wasi, .ios, .tvos, .visionos, .watchos => struct {
+    .wasi, .tvos, .watchos => struct {
         fn deinit(this: @This()) void {
             _ = this;
         }
@@ -15259,9 +15259,9 @@ fn processReplace(userdata: ?*anyopaque, options: process.ReplaceOptions) proces
 }
 
 const processSpawn = switch (native_os) {
-    .wasi, .emscripten, .ios, .tvos, .visionos, .watchos => processSpawnUnsupported,
+    .wasi, .emscripten, .tvos, .watchos => processSpawnUnsupported,
     .windows => processSpawnWindows,
-    .driverkit, .maccatalyst, .macos => processSpawnDarwin,
+    .driverkit, .ios, .maccatalyst, .macos, .visionos => processSpawnDarwin,
     else => processSpawnPosix,
 };
 

lib/std/process.zig

@@ -254,13 +254,13 @@ pub fn getBaseAddress() usize {
 /// process image. If this is `false` then calling `replace` or `replaceFile`
 /// functions will return `error.OperationUnsupported`.
 pub const can_replace = switch (native_os) {
-    .windows, .haiku, .wasi => false,
+    .windows, .haiku, .wasi, .tvos, .watchos => false,
     else => true,
 };
 
 /// Tells whether spawning child processes is supported.
 pub const can_spawn = switch (native_os) {
-    .wasi, .ios, .tvos, .visionos, .watchos => false,
+    .wasi, .tvos, .watchos => false,
     else => true,
 };