No need to define SHOW_KERNELS in build_init
No need to define SHOW_KERNELS in build_init

Environment variable works better

Poulpy21/vexcl,ddemidov/vexcl,Poulpy21/vexcl,Poulpy21/vexcl,kapadia/vexcl,ddemidov/vexcl,kapadia/vexcl