[question] build problem

[Z-star1]

Describe the problem
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Screenshots
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Dataset
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Log
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fatal error: math_functions.hpp: No such file or directory
#include <math_functions.hpp>
^~~~~~~~~~~~~~~~~~~~
compilation terminated.

Desktop (please complete the following and other pertinent information):

• OS: [e.g. win 10, osx, ]
• CCtag version: please specify if you are using a release version or your own build
  • Binary version (if applicable) [e.g. 1.0.0]
  • Commit reference (if applicable) [e.g. 08ddbe2]

Additional context
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