From 85292621ece3409a80929add91c971400ba724f3 Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Fri, 10 Sep 2021 11:36:29 +0100
Subject: [PATCH] Add emscripten testing and support. (#403)

* Tentatively add emscripten testing and support.
Fixes https://github.com/boostorg/config/issues/402.
---
 include/boost/config/platform/wasm.hpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/boost/config/platform/wasm.hpp b/include/boost/config/platform/wasm.hpp
index c307812d..682b8485 100644
--- a/include/boost/config/platform/wasm.hpp
+++ b/include/boost/config/platform/wasm.hpp
@@ -9,6 +9,12 @@
 
 #define BOOST_PLATFORM "Wasm"
 
+#ifdef __has_include
+#if __has_include(<unistd.h>)
+#  define BOOST_HAS_UNISTD_H
+#endif
+#endif
+
 // boilerplate code:
 #include <boost/config/detail/posix_features.hpp>
 //
-- 
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