Conditionally include igzip if 64bit sys

Cargo.toml

@@ -50,9 +50,6 @@ use-system-blosc2-shared = ["libcramjam/use-system-blosc2", "libcramjam/blosc2-s
 
 wasm32-compat            = ["libcramjam/wasm32-compat"]
 
-# isa-l not supported on 32-bit arch
-[target.'cfg(target_pointer_width = "32")'.features]
-default = ["extension-module", "snappy", "lz4", "bzip2", "brotli", "xz", "zstd", "gzip", "deflate", "blosc2"]
 
 [dependencies]
 pyo3 = { version = "^0.22", default-features = false, features = ["macros"] }

README.md

@@ -45,7 +45,7 @@ Available algorithms:
 - [X] ZSTD           `cramjam.zstd`
 - [X] XZ / LZMA  `cramjam.xz`
 - [X] Blosc2        `cramjam.experimental.blosc2`
-- [X] IGzip        `cramjam.experimental.igzip`
+- [X] IGzip        `cramjam.experimental.igzip` (only on 64-bit systems)
 
 All available for use as:
 

src/experimental.rs

@@ -13,7 +13,10 @@ pub mod experimental {
     #[pymodule_export]
     use crate::blosc2::blosc2;
 
-    #[cfg(any(feature = "igzip", feature = "isal-static", feature = "isal-shared"))]
+    #[cfg(all(
+        any(feature = "igzip", feature = "isal-static", feature = "isal-shared"),
+        target_pointer_width = "64"
+    ))]
     #[pymodule_export]
     use crate::igzip::igzip;
 }

src/lib.rs

@@ -65,7 +65,10 @@ pub mod bzip2;
 pub mod deflate;
 #[cfg(any(feature = "gzip", feature = "gzip-static", feature = "gzip-shared"))]
 pub mod gzip;
-#[cfg(any(feature = "igzip", feature = "isal-static", feature = "isal-shared"))]
+#[cfg(all(
+    any(feature = "igzip", feature = "isal-static", feature = "isal-shared"),
+    target_pointer_width = "64"
+))]
 pub mod igzip;
 #[cfg(feature = "lz4")]
 pub mod lz4;