diff -r ea1097d7bd27 -r e71435e046a1 cmake_modules/Platform/Emscripten.cmake
--- a/cmake_modules/Platform/Emscripten.cmake	Mon Apr 25 21:12:34 2016 +0200
+++ b/cmake_modules/Platform/Emscripten.cmake	Mon Apr 25 16:26:02 2016 -0400
@@ -58,7 +58,7 @@
 
 # Abort if not found.
 if("${EMSCRIPTEN_ROOT_PATH}" STREQUAL "")
-    message(FATAL_ERROR "Could not locate the Emscripten compiler toolchain directory! Either set the EMSCRIPTEN environment variable, or pass -DEMSCRIPTEN_ROOT_PATH=xxx to CMake to explicitly specify the location of the compiler! This usually matches EMSCRIPTEN_ROOT from your ~/.emscripten file.")
+    message(FATAL_ERROR "Could not locate the Emscripten compiler toolchain directory! Set the EMSCRIPTEN environment variable to explicitly specify the location of the compiler! This usually matches EMSCRIPTEN_ROOT from your ~/.emscripten file.")
 endif()
 
 # Normalize, convert Windows backslashes to forward slashes or CMake will crash.