Address #43

Alexhuszagh · Apr 18, 2021 · 0eef94d · 0eef94d
1 parent 84ec9b8
commit 0eef94d
Showing 1 changed file with 9 additions and 6 deletions.
diff --git a/lexical-core/build.rs b/lexical-core/build.rs
@@ -7,12 +7,15 @@ fn main() {
     // See `lexical-core/src/atof/algorithm/math.rs` for detailed
     // instructions of architecture instruction support for 64-bit
     // mathematical operations.
-    let limb_width_64 = cfg!(any(
-        target_arch = "aarch64",
-        target_arch = "mips64",
-        target_arch = "powerpc64",
-        target_arch = "x86_64"
-    ));
+    let limb_width_64 = match std::env::var("CARGO_CFG_TARGET_ARCH") {
+        Ok(arch) => ["aarch64", "mips64", "powerpc64", "x86_64"].contains(&&*arch),
+        Err(_) => cfg!(any(
+            target_arch = "aarch64",
+            target_arch = "mips64",
+            target_arch = "powerpc64",
+            target_arch = "x86_64"
+        ))
+    };
     if limb_width_64 {
         println!("cargo:rustc-cfg=limb_width_64");
     } else {