Add CMake find module for OpenSLES API

cmake/FindOpenSLES.cmake

@@ -0,0 +1,33 @@
+# - Find OpenSL ES includes and libraries
+#
+#   OPENSLES_FOUND        - True if OPENSLES_INCLUDE_DIR & OPENSLES_LIBRARY
+#                            are found
+#   OPENSLES_LIBRARIES    - Set when OPENSLES_LIBRARY is found
+#   OPENSLES_INCLUDE_DIRS - Set when OPENSLES_INCLUDE_DIR is found
+#
+#   OPENSLES_INCLUDE_DIR - where to find OpenSLES.h, etc.
+#   OPENSLES_LIBRARY     - the OpenSLES library
+#
+
+find_path(OPENSLES_INCLUDE_DIR
+          NAMES OpenSLES.h
+          PATH_SUFFIXES SLES
+          DOC "The OpenSL ES include directory"
+)
+
+find_library(OPENSLES_LIBRARY
+             NAME OpenSLES
+             DOC "The OpenSL ES library"
+)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(OpenSLES
+    REQUIRED_VARS OPENSLES_LIBRARY OPENSLES_INCLUDE_DIR
+)
+
+if(OPENSLES_FOUND)
+    set(OPENSLES_LIBRARIES ${OPENSLES_LIBRARY})
+    set(OPENSLES_INCLUDE_DIRS ${OPENSLES_INCLUDE_DIRS})
+endif()
+
+mark_as_advanced(OPENSLES_INCLUDE_DIR OPENSLES_LIBRARY)