tested cross-compilation

Cargo.toml

@@ -12,18 +12,17 @@ categories = ["aerospace", "aerospace::space-protocols", "no-std", "hardware-sup
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-num = "0.4"
+num = { version = "0.4", default-features = false }
-serde = { version = "1.0.142", features = ["derive"] }
+serde = { version = "1.0.142", default-features = false, features = ["derive"] }
 zerocopy = "0.6.1"
 crc = "3.0.0"
 delegate = "0.7.0"
-chrono = "0.4.20"
+chrono = { version = "0.4.20", default-features = false }
 
 [dev-dependencies.postcard]
 version = "1.0.1"
-features = ["use-std"]
 
 [features]
 default = ["alloc"]
-std = ["postcard/use-std"]
+std = ["chrono/std", "chrono/clock", "postcard/use-std"]
-alloc = ["serde/alloc"]
+alloc = ["serde/alloc", "chrono/alloc", "postcard/alloc"]

src/lib.rs

@@ -512,11 +512,15 @@ pub mod zc {
 mod tests {
     use crate::SpHeader;
     use crate::{
-        packet_type_in_raw_packet_id, zc, CcsdsPacket, CcsdsPrimaryHeader, PacketId,
+        packet_type_in_raw_packet_id, zc, CcsdsPacket, PacketId,
         PacketSequenceCtrl, PacketType, SequenceFlags,
     };
     use alloc::vec;
-    use postcard::{from_bytes, to_stdvec};
+    use postcard::from_bytes;
+    #[cfg(feature = "std")]
+    use postcard::to_stdvec;
+    #[cfg(feature = "std")]
+    use crate::CcsdsPrimaryHeader;
 
     #[test]
     fn test_seq_flag_helpers() {
@@ -599,6 +603,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg(feature = "std")]
     fn test_serde_sph() {
         let sp_header = SpHeader::tc(0x42, 12, 0).expect("Error creating SP header");
         assert_eq!(sp_header.ccsds_version(), 0b000);

src/time.rs

@@ -2,6 +2,10 @@
 use crate::{PacketError, SizeMissmatch};
 use chrono::{DateTime, TimeZone, Utc};
 
+#[allow(unused_imports)]
+#[cfg(not(feature = "std"))]
+use num::traits::float::FloatCore;
+
 use crate::time::CcsdsTimeCodes::Cds;
 #[cfg(feature = "std")]
 use std::time::{SystemTime, SystemTimeError};