if ("${PKG_GLES1_INCLUDE_DIRS}" STREQUAL "")
# PKG_GLES1_INCLUDE_DIRS empty, see if matching include
# path (GLES/gl.h) exists beside library directory
if ("${PKG_GLES1_INCLUDE_DIRS}" STREQUAL "")
# PKG_GLES1_INCLUDE_DIRS empty, see if matching include
# path (GLES/gl.h) exists beside library directory