crc-fast-rust: fixing unused type aliases; fixing flags.

Author: loadingalias

Cargo.toml

@@ -33,7 +33,7 @@ indexmap = { version = ">=2.11.0, <2.12.0", optional = true }
 
 # no_std support
 # spin is always required for no_std builds (feature detection synchronization)
-spin = { version = "0.10.0", default-features = false, features = ["once", "rwlock"] }
+spin = { version = "0.10.0", default-features = false, features = ["once", "rwlock", "mutex", "spin_mutex"] }
 # hashbrown is only needed when caching is enabled in no_std
 hashbrown = { version = "0.16.0", optional = true }
 

src/arch/software.rs

@@ -26,8 +26,10 @@ use spin::{Mutex, Once};
 
 // Cache key types for custom algorithms
 #[cfg(feature = "alloc")]
+#[cfg(any(feature = "std", feature = "cache"))]
 type Crc32Key = (u32, u32, bool, bool, u32, u32);
 #[cfg(feature = "alloc")]
+#[cfg(any(feature = "std", feature = "cache"))]
 type Crc64Key = (u64, u64, bool, bool, u64, u64);
 
 // Global caches for custom algorithms (std version)

src/lib.rs

@@ -194,6 +194,7 @@ use crate::crc32::consts::{
 };
 
 #[cfg(any(target_arch = "x86", target_arch = "x86_64", target_arch = "aarch64"))]
+#[cfg(feature = "std")]
 use crate::crc32::fusion;
 
 use crate::crc64::consts::{
@@ -947,7 +948,7 @@ fn get_calculator_params(algorithm: CrcAlgorithm) -> (CalculatorFn, CrcParams) {
 /// fusion techniques to accelerate the calculation beyond what SIMD can do alone.
 #[inline(always)]
 fn crc32_iscsi_calculator(state: u64, data: &[u8], _params: CrcParams) -> u64 {
-    #[cfg(target_arch = "aarch64")]
+    #[cfg(all(target_arch = "aarch64", feature = "std"))]
     {
         use std::arch::is_aarch64_feature_detected;
         if is_aarch64_feature_detected!("aes") && is_aarch64_feature_detected!("crc") {
@@ -956,7 +957,7 @@ fn crc32_iscsi_calculator(state: u64, data: &[u8], _params: CrcParams) -> u64 {
     }
 
     // both aarch64 and x86 have native CRC-32/ISCSI support, so we can use fusion
-    #[cfg(any(target_arch = "x86_64", target_arch = "x86"))]
+    #[cfg(all(any(target_arch = "x86_64", target_arch = "x86"), feature = "std"))]
     {
         use std::arch::is_x86_feature_detected;
         if is_x86_feature_detected!("sse4.2") && is_x86_feature_detected!("pclmulqdq") {
@@ -977,7 +978,7 @@ fn crc32_iscsi_calculator(state: u64, data: &[u8], _params: CrcParams) -> u64 {
 #[inline(always)]
 fn crc32_iso_hdlc_calculator(state: u64, data: &[u8], _params: CrcParams) -> u64 {
     // aarch64 CPUs have native CRC-32/ISO-HDLC support, so we can use the fusion implementation
-    #[cfg(target_arch = "aarch64")]
+    #[cfg(all(target_arch = "aarch64", feature = "std"))]
     {
         use std::arch::is_aarch64_feature_detected;
         if is_aarch64_feature_detected!("aes") && is_aarch64_feature_detected!("crc") {