From aa43d2fe656ed1815c53523783f509f8c2d64d67 Mon Sep 17 00:00:00 2001
From: Squareys <squareys@googlemail.com>
Date: Fri, 18 Aug 2017 10:16:51 +0200
Subject: [PATCH] Audio: Clear error for alcCreateContext failure on emscripten

Emscripten AL does not support specifying attributes and does not set a
ALC error when alcCreateContext fails.

Signed-off-by: Squareys <squareys@googlemail.com>
---
 src/Magnum/Audio/Context.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/Magnum/Audio/Context.cpp b/src/Magnum/Audio/Context.cpp
index e834f6ebc..3229fe1fc 100644
--- a/src/Magnum/Audio/Context.cpp
+++ b/src/Magnum/Audio/Context.cpp
@@ -228,7 +228,16 @@ bool Context::tryCreateContext(const Configuration& config) {
         attributes[last++] = config.refreshRate();
     }
 
+#ifndef CORRADE_TARGET_EMSCRIPTEN
     _context = alcCreateContext(_device, attributes);
+#else
+    /* Attribute list currently not supported by emscripten */
+    if(last != 0) {
+        Magnum::Error() << "Audio::Context::tryCreateContext(): spcifying attributes is not supported with emscripten.";
+        return false;
+    }
+    _context = alcCreateContext(_device, nullptr);
+#endif
     return !!_context;
 }