Remove support for 32-bit Apple targets

.cirrus.yml

@@ -31,16 +31,13 @@ task:
     - name: OSX x86_64
       env:
         TARGET: x86_64-apple-darwin
-    - name: OSX i686
+    - name: iOS aarch64
       env:
-        TARGET: i686-apple-darwin
+        TARGET: aarch64-apple-ios
         DISABLE_TESTS: 1
-    - name: iOS
+    - name: iOS x86_64
       env:
-        # To save VM startup time, test all iOS targets in a single task.
+        TARGET: x86_64-apple-ios
-        # The startup and scheduling time was very significant for Travis, but
-        # not known for Cirrus.
-        TARGET: "aarch64-apple-ios;armv7-apple-ios;armv7s-apple-ios;i386-apple-ios;x86_64-apple-ios"
         DISABLE_TESTS: 1
   osx_instance:
     image: catalina-xcode

CHANGELOG.md

@@ -72,6 +72,10 @@ This project adheres to [Semantic Versioning](https://semver.org/).
   for all platforms.
   (#[1484](https://github.com/nix-rust/nix/pull/1484))
 
+- Removed support for 32-bit Apple targets, since they've been dropped by both
+  Rustc and Xcode.
+  (#[1492](https://github.com/nix-rust/nix/pull/1492))
+
 ## [0.22.0] - 9 July 2021
 ### Added
 - Added `if_nameindex` (#[1445](https://github.com/nix-rust/nix/pull/1445))

README.md

@@ -68,11 +68,7 @@ Tier 2:
   * aarch64-linux-android
   * arm-linux-androideabi
   * arm-unknown-linux-musleabi
-  * armv7-apple-ios
   * armv7-linux-androideabi
-  * armv7s-apple-ios
-  * i386-apple-ios
-  * i686-apple-darwin
   * i686-linux-android
   * powerpc-unknown-linux-gnu
   * s390x-unknown-linux-gnu