Compilation error

[YuxinxinChen]

Hi Lux Team,

I am trying to compile Lux but got following compile error:

../legion/runtime/legion/legion_utilities.h(6513): error: identifier "__builtin_vec_splats" is undefined
../legion/runtime/legion/legion_utilities.h(7143): error: identifier "__builtin_vec_splats" is undefined
../legion/runtime/legion/legion_utilities.h(7246): error: identifier "__builtin_vec_splats" is undefined
../legion/runtime/legion/legion_utilities.h(7281): error: identifier "__builtin_vec_splats" is undefined
../legion/runtime/legion/legion_utilities.h(7299): error: identifier "__builtin_vec_splats" is undefined
../legion/runtime/legion/legion_utilities.h(7332): error: identifier "__builtin_vec_splats" is undefined
../legion/runtime/legion/legion_utilities.h(7343): error: identifier "__builtin_vec_splats" is undefined
../legion/runtime/legion/legion_utilities.h(7389): error: identifier "__builtin_vec_splats" is undefined
../legion/runtime/legion/legion_utilities.h(7405): error: identifier "__builtin_vec_splats" is undefined
../legion/runtime/legion/legion_utilities.h(7662): error: expression must have pointer-to-object type but it has type "int"
../legion/runtime/legion/legion_utilities.h(7663): error: expression must have pointer-to-object type but it has type "int"

I use CUDA 11.4, gcc 11.1, Openmpi 4.0 and v100 GPU on the summit.
Thanks!