From e43c838450371008db60d552a586876855ba3d0d Mon Sep 17 00:00:00 2001
From: Jethro Beekman <jethro@fortanix.com>
Date: Wed, 21 Nov 2018 14:07:57 +0530
Subject: [PATCH] Add SGX target

---
 build.rs    | 4 ++--
 src/lib.rs  | 3 ++-
 src/math.rs | 2 +-
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/build.rs b/build.rs
index 6f2cc76..f5ada02 100644
--- a/build.rs
+++ b/build.rs
@@ -17,9 +17,9 @@ fn main() {
         return;
     }
 
-    // Forcibly enable memory intrinsics on wasm32 as we don't have a libc to
+    // Forcibly enable memory intrinsics on wasm32 & SGX as we don't have a libc to
     // provide them.
-    if target.contains("wasm32") {
+    if target.contains("wasm32") || target.contains("sgx") {
         println!("cargo:rustc-cfg=feature=\"mem\"");
     }
 
diff --git a/src/lib.rs b/src/lib.rs
index 9f1dd15..9bb38f3 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -48,7 +48,8 @@ pub mod int;
 pub mod float;
 
 #[cfg(any(all(target_arch = "wasm32", target_os = "unknown"),
-          all(target_arch = "arm", target_os = "none")))]
+          all(target_arch = "arm", target_os = "none"),
+          target_env = "sgx"))]
 pub mod math;
 pub mod mem;
 
diff --git a/src/math.rs b/src/math.rs
index 9db7a0a..c372435 100644
--- a/src/math.rs
+++ b/src/math.rs
@@ -15,7 +15,7 @@ macro_rules! no_mangle {
 }
 
 // only for the wasm32-unknown-unknown target
-#[cfg(all(target_arch = "wasm32", target_os = "unknown"))]
+#[cfg(any(all(target_arch = "wasm32", target_os = "unknown"), target_env = "sgx"))]
 no_mangle! {
     fn acos(x: f64) -> f64;
     fn asin(x: f64) -> f64;