diff -r ef625fe6eaaa -r 870f22de388b cmake_modules/FindEmscripten.cmake
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cmake_modules/FindEmscripten.cmake	Wed Apr 20 14:46:04 2016 -0400
@@ -0,0 +1,36 @@
+# - Try to find the Clang/LLVM executable
+# Once done this will define
+#
+#  EMSCRIPTEN_FOUND       - system has Clang
+#  EMSCRIPTEN_VERSION     - Clang version
+#  EMSCRIPTEN_EXECUTABLE  - Clang executable
+#
+# Copyright (c) 2013, Vittorio Giovara <vittorio.giovara@gmail.com>
+#
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+find_program(EMSCRIPTEN_EXECUTABLE
+        NAMES emcc
+        PATHS /opt/local/bin /usr/local/bin /usr/bin)
+
+if (EMSCRIPTEN_EXECUTABLE)
+    execute_process(COMMAND ${EMSCRIPTEN_EXECUTABLE} -v
+                    OUTPUT_VARIABLE EMSCRIPTEN_VERSION_OUTPUT
+                    ERROR_VARIABLE EMSCRIPTEN_VERSION_ERROR
+                    RESULT_VARIABLE EMSCRIPTEN_VERSION_RESULT
+                    OUTPUT_STRIP_TRAILING_WHITESPACE
+                    )
+
+    if(${EMSCRIPTEN_VERSION_RESULT} EQUAL 0)
+        string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" EMSCRIPTEN_VERSION "${EMSCRIPTEN_VERSION_OUTPUT}")
+        string(REGEX REPLACE "([0-9]+\\.[0-9]+\\.[0-9]+)" "\\1" EMSCRIPTEN_VERSION "${EMSCRIPTEN_VERSION}")
+    else()
+        message(SEND_ERROR "Command \"${EMSCRIPTEN_EXECUTABLE} --version\" failed with output: ${EMSCRIPTEN_VERSION_ERROR}")
+    endif()
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Emscripten DEFAULT_MSG EMSCRIPTEN_EXECUTABLE EMSCRIPTEN_VERSION)
+mark_as_advanced(EMSCRIPTEN_VERSION)
+