Return ERROR when installing pyopencl

[Larz60+]

did you follow the installation instructions

What you’ll need:

gcc/g++ at or newer than version 4.8.2 and binutils at or newer than 2.23.52.0.1-10 (CentOS version number). On Windows, use the mingwpy compilers.
numpy, and
an OpenCL implementation. (See this howto for how to get one.)