From e54aa2c378e97f0f2657c82ffdb0b36782e5788d Mon Sep 17 00:00:00 2001
From: king6cong <king6cong@gmail.com>
Date: Wed, 28 Jun 2017 20:40:08 +0800
Subject: [PATCH] fix arm-linux-androideabi-gcc -Oz error

---
 src/lib.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index 16ab426..0631b75 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -602,7 +602,13 @@ impl Config {
             }
             ToolFamily::Gnu |
             ToolFamily::Clang => {
-                cmd.args.push(format!("-O{}", opt_level).into());
+                // arm-linux-androideabi-gcc 4.8 shipped with Android NDK does not support '-Oz'
+                if target.contains("android") && &opt_level[..] == "z" {
+                    cmd.args.push("-Os".into());;
+                } else {
+                    cmd.args.push(format!("-O{}", opt_level).into());
+                }
+
                 if !nvcc {
                     cmd.args.push("-ffunction-sections".into());
                     cmd.args.push("-fdata-sections".into());