add engine support for linux-gnu

Signed-off-by: Xintao <[email protected]>

Author: hunterlxt

src/lib.rs

@@ -103,16 +103,19 @@ impl Build {
             .arg("no-comp")
             .arg("no-zlib")
             .arg("no-zlib-dynamic")
+            // MUSL doesn't implement some of the libc functions that the async
+            // stuff depends on, and we don't bind to any of that in any case.
+            .arg("no-async");
+
+        if target.contains("x86_64-unknown-linux-gnu") {
             // This actually fails to compile on musl (it needs linux/version.h
             // right now) but we don't actually need this most of the time. This
             // is intended for super-configurable backends and whatnot
             // apparently but the whole point of this script is to produce a
             // "portable" implementation of OpenSSL, so shouldn't be any harm in
             // turning this off.
-            .arg("no-engine")
-            // MUSL doesn't implement some of the libc functions that the async
-            // stuff depends on, and we don't bind to any of that in any case.
-            .arg("no-async");
+            configure.arg("no-engine");
+        }
 
         // On Android it looks like not passing no-stdio may cause a build
         // failure (#13), but most other platforms need it for things like