clang++ src/patricia.cpp -O3 -march=native -std=c++20 -ffast-math -pthread -o Patricia-00ACB0D2 -lm 
In file included from src/patricia.cpp:1:
In file included from src/search.h:2:
In file included from src/movegen.h:3:
In file included from src/position.h:2:
In file included from src/utils.h:3:
src/nnue.h:77:43: error: use of undeclared identifier 'feature_indices'
   77 |     const auto [white_from, black_from] = feature_indices(from_piece, from);
      |                                           ^
src/nnue.h:78:39: error: use of undeclared identifier 'feature_indices'
   78 |     const auto [white_to, black_to] = feature_indices(to_piece, to);
      |                                       ^
src/nnue.h:93:43: error: use of undeclared identifier 'feature_indices'
   93 |     const auto [white_from, black_from] = feature_indices(from_piece, from);
      |                                           ^
src/nnue.h:94:39: error: use of undeclared identifier 'feature_indices'
   94 |     const auto [white_to, black_to] = feature_indices(to_piece, to);
      |                                       ^
src/nnue.h:95:43: error: use of undeclared identifier 'feature_indices'
   95 |     const auto [white_capt, black_capt] = feature_indices(captured, captured_sq);
      |                                           ^
src/nnue.h:112:45: error: use of undeclared identifier 'feature_indices'
  112 |     const auto [white_from1, black_from1] = feature_indices(piece1, from1);
      |                                             ^
src/nnue.h:113:41: error: use of undeclared identifier 'feature_indices'
  113 |     const auto [white_to1, black_to1] = feature_indices(piece1, to1);
      |                                         ^
src/nnue.h:114:45: error: use of undeclared identifier 'feature_indices'
  114 |     const auto [white_from2, black_from2] = feature_indices(piece2, from2);
      |                                             ^
src/nnue.h:115:41: error: use of undeclared identifier 'feature_indices'
  115 |     const auto [white_to2, black_to2] = feature_indices(piece2, to2);
      |                                         ^
9 errors generated.
make: *** [Makefile:33: build] Error 1