set fallback feature in iana-time-zone depedency

Author: trevor-crypto

Cargo.toml

@@ -40,13 +40,12 @@ serde = { version = "1.0.99", default-features = false, optional = true }
 pure-rust-locales = { version = "0.5.2", optional = true }
 criterion = { version = "0.3", optional = true }
 rkyv = {version = "0.7", optional = true}
+iana-time-zone = { version = "0.1.41", optional = true, features = ["fallback"] }
 
 [target.'cfg(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi"))))'.dependencies]
 wasm-bindgen = { version = "0.2" }
 js-sys = { version = "0.3" } # contains FFI bindings for the JS Date API
 
-[target.'cfg(not(any(target_os = "emscripten", target_os = "wasi", target_os = "solaris", target_env = "sgx")))'.dependencies]
-iana-time-zone = { version = "0.1.41", optional = true }
 
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "0.3.0", features = ["std", "minwinbase", "minwindef", "timezoneapi"], optional = true }

src/offset/local/unix.rs

@@ -103,12 +103,6 @@ const TZDB_LOCATION: &str = " /system/usr/share/zoneinfo";
 #[cfg(not(target_os = "android"))]
 const TZDB_LOCATION: &str = "/usr/share/zoneinfo";
 
-#[cfg(any(target_os = "emscripten", target_os = "wasi", target_os = "solaris"))]
-fn fallback_timezone() -> Option<TimeZone> {
-    Some(TimeZone::utc())
-}
-
-#[cfg(not(any(target_os = "emscripten", target_os = "wasi", target_os = "solaris")))]
 fn fallback_timezone() -> Option<TimeZone> {
     let tz_name = iana_time_zone::get_timezone().ok()?;
     let bytes = fs::read(format!("{}/{}", TZDB_LOCATION, tz_name)).ok()?;