From 3b86de9b0f83b1032457fb7c9e792b20e3bd5714 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Papierski?= <michal@papierski.net>
Date: Fri, 31 Aug 2018 10:26:06 +0200
Subject: [PATCH] Use correct flag on big endian machines.

This will fix `tests::sign` test case on mips/mips64. Verified with
`cross`[1] tool.

    cross test --target mips-unknown-linux-gnu
    cross test --target mips64el-unknown-linux-gnuabi64

Unfortunately this fix doesn't make `tests::test_debug_output` test case
pass, but this is about debug output so its not as critical as this
patch. See #63 for a discussion.

[1]: https://github.com/japaric/rust-cross
---
 build.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/build.rs b/build.rs
index 8175c82..c72a2d4 100644
--- a/build.rs
+++ b/build.rs
@@ -61,6 +61,12 @@ fn main() {
                .define("ENABLE_MODULE_ECDH", Some("1"))
                .define("ENABLE_MODULE_RECOVERY", Some("1"));
 
+    if let Ok(target_endian) = std::env::var("CARGO_CFG_TARGET_ENDIAN") {
+        if target_endian == "big" {
+            base_config.define("WORDS_BIGENDIAN", Some("1"));
+        }
+    }
+
     if use_64bit_compilation {
         base_config.define("USE_FIELD_5X52", Some("1"))
                    .define("USE_SCALAR_4X64", Some("1"))