Re-enable builds on 32-bit Windows

The parent commit fixes the problems with 32-bit Windows, this one
simply re-enables the build and re-activates the CI runs of it.

.github/workflows/ci.yml

@@ -48,6 +48,11 @@ jobs:
               python-architecture: "x64",
               rust-target: "x86_64-pc-windows-msvc",
             },
+            {
+              os: "windows-latest",
+              python-architecture: "x86",
+              rust-target: "i686-pc-windows-msvc",
+            },
           ]
         include:
           # ubuntu-24.04 does not support 3.7
@@ -141,6 +146,11 @@ jobs:
               python-architecture: "x64",
               rust-target: "x86_64-pc-windows-msvc",
             },
+            {
+              os: "windows-latest",
+              python-architecture: "x86",
+              rust-target: "i686-pc-windows-msvc",
+            },
           ]
         include:
           # ubuntu-24.04 does not support 3.7
@@ -181,6 +191,7 @@ jobs:
           nox -f examples/simple/noxfile.py
     env:
       CARGO_TERM_VERBOSE: true
+      CARGO_BUILD_TARGET: ${{ matrix.platform.rust-target }}
       RUST_BACKTRACE: 1
 
   cross-build:

src/lib.rs

@@ -74,9 +74,6 @@ as well as the [`PyReadonlyArray::try_as_matrix`] and [`PyReadwriteArray::try_as
 // and similar aren't constructible
 #![cfg_attr(feature = "gil-refs", deny(missing_debug_implementations))]
 
-#[cfg(all(target_os = "windows", target_arch = "x86"))]
-compile_error!("Compilation for 32-bit windows is not currently supported. See https://github.com/PyO3/rust-numpy/issues/448");
-
 pub mod array;
 mod array_like;
 pub mod borrow;