cmake not found by matxscript PyTorch extension, please install it!!!

[hyfeng]

when i test this exmaple, encounted the error: cmake not found by matxscript PyTorch extension, please install it!!!
what's the matxscript pytorch extension?
import torch import matx class Mycell(torch.nn.Module): def __init__(self): super(Mycell, self).__init__() self.linear = torch.nn.Linear(4, 4) def forward(self, x, h): new_h = torch.tanh(self.linear(x) + h) return new_h, new_h device = torch.device("cpu") mycel = Mycell().to(device) scipt_model = torch.jit.trace(mycel,(torch.rand(3,4).to(device),torch.rand(3,4).to(device))) infer_op = matx.script(scipt_model)