Merge pull request #519 from c-nixon/check-CARGO_CFG_TARGET_OS-in-build

build/Cargo.toml

@@ -12,5 +12,5 @@ version = "1.0.1"
 [dependencies]
 cfg-if = "1"
 
-[target.'cfg(windows)'.dependencies]
+[target.'cfg(not(target_env = "musl"))'.dependencies]
 ureq = "2"

build/src/lib.rs

@@ -1,11 +1,23 @@
+mod macos;
+
 cfg_if::cfg_if! {
-  if #[cfg(windows)] {
+  if #[cfg(not(target_env = "musl"))] {
     mod windows;
-    pub use windows::setup;
-  } else if #[cfg(target_os = "macos")] {
-    mod macos;
-    pub use macos::setup;
-  } else {
-    pub fn setup() { }
+  }
+}
+
+pub fn setup() {
+  match std::env::var("CARGO_CFG_TARGET_OS").as_deref() {
+    Ok("macos") => macos::setup(),
+    Ok("windows") => {
+      cfg_if::cfg_if! {
+        if #[cfg(not(target_env = "musl"))] {
+          windows::setup()
+        } else {
+          eprintln!("Cross compiling to windows-msvc is not supported from *-musl hosts")
+        }
+      }
+    }
+    _ => {}
   }
 }