Error in setup.py

[hyunynim]

Thank you for your great working.
I get this error messge when i run setup.py

running build_ext
building 'im2mesh.utils.libkdtree.pykdtree.kdtree' extension
Emitting ninja build file /home/hongza/lab/differentiable_volumetric_rendering/build/temp.linux-x86_64-3.8/build.ninja...
Compiling objects...
Allowing ninja to set a default number of workers... (overridable by setting the environment variable MAX_JOBS=N)
[1/1] c++ -MMD -MF /home/hongza/lab/differentiable_volumetric_rendering/build/temp.linux-x86_64-3.8/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.o.d -pthread -B /home/hongza/.conda/envs/dvr/compiler_compat -Wl,--sysroot=/ -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/home/hongza/.conda/envs/dvr/lib/python3.8/site-packages/numpy/core/include -I/home/hongza/.conda/envs/dvr/include/python3.8 -c -c /home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c -o /home/hongza/lab/differentiable_volumetric_rendering/build/temp.linux-x86_64-3.8/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.o -std=c99 -O3 -fopenmp -DTORCH_API_INCLUDE_EXTENSION_H -DTORCH_EXTENSION_NAME=kdtree -D_GLIBCXX_USE_CXX11_ABI=0
FAILED: /home/hongza/lab/differentiable_volumetric_rendering/build/temp.linux-x86_64-3.8/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.o 
c++ -MMD -MF /home/hongza/lab/differentiable_volumetric_rendering/build/temp.linux-x86_64-3.8/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.o.d -pthread -B /home/hongza/.conda/envs/dvr/compiler_compat -Wl,--sysroot=/ -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/home/hongza/.conda/envs/dvr/lib/python3.8/site-packages/numpy/core/include -I/home/hongza/.conda/envs/dvr/include/python3.8 -c -c /home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c -o /home/hongza/lab/differentiable_volumetric_rendering/build/temp.linux-x86_64-3.8/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.o -std=c99 -O3 -fopenmp -DTORCH_API_INCLUDE_EXTENSION_H -DTORCH_EXTENSION_NAME=kdtree -D_GLIBCXX_USE_CXX11_ABI=0
cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++
cc1plus: warning: command line option ‘-std=c99’ is valid for C/ObjC but not for C++
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:49:3: error: conflicting declaration ‘typedef struct Node_float Node_float’
 } Node_float;
   ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: previous declaration as ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:70:3: error: conflicting declaration ‘typedef struct Node_double Node_double’
 } Node_double;
   ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: previous declaration as ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:95:40: error: expected ‘,’ or ‘...’ before ‘pa’
 void search_leaf_float(float *restrict pa, uint32_t *restrict pidx, int8_t no_dims, uint32_t start_idx, uint32_t n, float *restrict point_coord,
                                        ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:97:45: error: expected ‘,’ or ‘...’ before ‘pa’
 void search_leaf_float_mask(float *restrict pa, uint32_t *restrict pidx, int8_t no_dims, uint32_t start_idx, uint32_t n, float *restrict point_coord,
                                             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:119:42: error: expected ‘,’ or ‘...’ before ‘pa’
 void search_leaf_double(double *restrict pa, uint32_t *restrict pidx, int8_t no_dims, uint32_t start_idx, uint32_t n, double *restrict point_coord,
                                          ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:121:47: error: expected ‘,’ or ‘...’ before ‘pa’
 void search_leaf_double_mask(double *restrict pa, uint32_t *restrict pidx, int8_t no_dims, uint32_t start_idx, uint32_t n, double *restrict point_coord,
                                               ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: In function ‘Node_float* construct_subtree_float(float*, uint32_t*, int8_t, uint32_t, uint32_t, uint32_t, float*)’:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:346:13: error: invalid use of incomplete type ‘struct Node_float’
         root->cut_dim = -1;
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:355:17: error: invalid use of incomplete type ‘struct Node_float’
             root->cut_dim = -1;
                 ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:358:13: error: invalid use of incomplete type ‘struct Node_float’
         root->cut_val = cut_val;
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:359:13: error: invalid use of incomplete type ‘struct Node_float’
         root->cut_dim = cut_dim;
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:366:13: error: invalid use of incomplete type ‘struct Node_float’
         root->cut_bounds_lv = lv;
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:367:13: error: invalid use of incomplete type ‘struct Node_float’
         root->cut_bounds_hv = hv;
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:371:13: error: invalid use of incomplete type ‘struct Node_float’
         root->left_child = (struct Node_float *)construct_subtree_float(pa, pidx, no_dims, start_idx, n_lo, bsp, bbox);
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:376:13: error: invalid use of incomplete type ‘struct Node_float’
         root->right_child = (struct Node_float *)construct_subtree_float(pa, pidx, no_dims, start_idx + n_lo, n - n_lo, bsp, bbox);
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: In function ‘Node_float* create_node_float(uint32_t, uint32_t, int)’:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:433:58: error: invalid application of ‘sizeof’ to incomplete type ‘Node_float’
         new_node = (Node_float *)malloc(sizeof(Node_float) - 2 * sizeof(Node_float *));
                                                          ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:437:58: error: invalid application of ‘sizeof’ to incomplete type ‘Node_float’
         new_node = (Node_float *)malloc(sizeof(Node_float));
                                                          ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:439:13: error: invalid use of incomplete type ‘struct Node_float’
     new_node->n = n;
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:440:13: error: invalid use of incomplete type ‘struct Node_float’
     new_node->start_idx = start_idx;
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: In function ‘void delete_subtree_float(Node_float*)’:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:451:13: error: invalid use of incomplete type ‘struct Node_float’
     if (root->cut_dim != -1)
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:453:48: error: invalid use of incomplete type ‘struct Node_float’
         delete_subtree_float((Node_float *)root->left_child);
                                                ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:454:48: error: invalid use of incomplete type ‘struct Node_float’
         delete_subtree_float((Node_float *)root->right_child);
                                                ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: In function ‘void print_tree_float(Node_float*, int)’:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:482:48: error: invalid use of incomplete type ‘struct Node_float’
     printf("(cut_val: %f, cut_dim: %i)\n", root->cut_val, root->cut_dim);
                                                ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:482:63: error: invalid use of incomplete type ‘struct Node_float’
     printf("(cut_val: %f, cut_dim: %i)\n", root->cut_val, root->cut_dim);
                                                               ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:483:13: error: invalid use of incomplete type ‘struct Node_float’
     if (root->cut_dim != -1)
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:484:44: error: invalid use of incomplete type ‘struct Node_float’
         print_tree_float((Node_float *)root->left_child, level + 1);
                                            ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:485:13: error: invalid use of incomplete type ‘struct Node_float’
     if (root->cut_dim != -1)
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:486:44: error: invalid use of incomplete type ‘struct Node_float’
         print_tree_float((Node_float *)root->right_child, level + 1);
                                            ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: At global scope:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:569:40: error: expected ‘,’ or ‘...’ before ‘pa’
 void search_leaf_float(float *restrict pa, uint32_t *restrict pidx, int8_t no_dims, uint32_t start_idx, uint32_t n, float *restrict point_coord,
                                        ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: In function ‘void search_leaf_float(float*)’:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:575:21: error: ‘n’ was not declared in this scope
     for (i = 0; i < n; i++)
                     ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:20: error: ‘pa’ was not declared in this scope
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                    ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:578:37: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_float(&PA(start_idx + i, 0), point_coord, no_dims);
                                     ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:23: error: ‘no_dims’ was not declared in this scope
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                       ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:578:37: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_float(&PA(start_idx + i, 0), point_coord, no_dims);
                                     ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:33: error: ‘pidx’ was not declared in this scope
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                 ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:578:37: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_float(&PA(start_idx + i, 0), point_coord, no_dims);
                                     ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:33: note: suggested alternative: ‘pid_t’
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                 ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:578:37: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_float(&PA(start_idx + i, 0), point_coord, no_dims);
                                     ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:578:40: error: ‘start_idx’ was not declared in this scope
         cur_dist = calc_dist_float(&PA(start_idx + i, 0), point_coord, no_dims);
                                        ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:38: note: in definition of macro ‘PA’
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                      ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:578:40: note: suggested alternative: ‘strtold’
         cur_dist = calc_dist_float(&PA(start_idx + i, 0), point_coord, no_dims);
                                        ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:38: note: in definition of macro ‘PA’
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                      ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:578:59: error: ‘point_coord’ was not declared in this scope
         cur_dist = calc_dist_float(&PA(start_idx + i, 0), point_coord, no_dims);
                                                           ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:580:24: error: ‘closest_dist’ was not declared in this scope
         if (cur_dist < closest_dist[k - 1])
                        ^~~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:580:24: note: suggested alternative: ‘cur_dist’
         if (cur_dist < closest_dist[k - 1])
                        ^~~~~~~~~~~~
                        cur_dist
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:580:37: error: ‘k’ was not declared in this scope
         if (cur_dist < closest_dist[k - 1])
                                     ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:582:32: error: ‘closest_idx’ was not declared in this scope
             insert_point_float(closest_idx, closest_dist, pidx[start_idx + i], cur_dist, k);
                                ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: At global scope:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:601:45: error: expected ‘,’ or ‘...’ before ‘pa’
 void search_leaf_float_mask(float *restrict pa, uint32_t *restrict pidx, int8_t no_dims, uint32_t start_idx, uint32_t n, float *restrict point_coord,
                                             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: In function ‘void search_leaf_float_mask(float*)’:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:607:21: error: ‘n’ was not declared in this scope
     for (i = 0; i < n; i++)
                     ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:610:13: error: ‘mask’ was not declared in this scope
         if (mask[pidx[start_idx + i]])
             ^~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:610:18: error: ‘pidx’ was not declared in this scope
         if (mask[pidx[start_idx + i]])
                  ^~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:610:18: note: suggested alternative: ‘pid_t’
         if (mask[pidx[start_idx + i]])
                  ^~~~
                  pid_t
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:610:23: error: ‘start_idx’ was not declared in this scope
         if (mask[pidx[start_idx + i]])
                       ^~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:610:23: note: suggested alternative: ‘strtold’
         if (mask[pidx[start_idx + i]])
                       ^~~~~~~~~
                       strtold
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:20: error: ‘pa’ was not declared in this scope
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                    ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:615:37: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_float(&PA(start_idx + i, 0), point_coord, no_dims);
                                     ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:23: error: ‘no_dims’ was not declared in this scope
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                       ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:615:37: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_float(&PA(start_idx + i, 0), point_coord, no_dims);
                                     ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:33: error: ‘pidx’ was not declared in this scope
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                 ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:615:37: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_float(&PA(start_idx + i, 0), point_coord, no_dims);
                                     ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:33: note: suggested alternative: ‘pid_t’
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                 ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:615:37: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_float(&PA(start_idx + i, 0), point_coord, no_dims);
                                     ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:615:40: error: ‘start_idx’ was not declared in this scope
         cur_dist = calc_dist_float(&PA(start_idx + i, 0), point_coord, no_dims);
                                        ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:38: note: in definition of macro ‘PA’
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                      ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:615:40: note: suggested alternative: ‘strtold’
         cur_dist = calc_dist_float(&PA(start_idx + i, 0), point_coord, no_dims);
                                        ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:38: note: in definition of macro ‘PA’
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                      ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:615:59: error: ‘point_coord’ was not declared in this scope
         cur_dist = calc_dist_float(&PA(start_idx + i, 0), point_coord, no_dims);
                                                           ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:617:24: error: ‘closest_dist’ was not declared in this scope
         if (cur_dist < closest_dist[k - 1])
                        ^~~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:617:24: note: suggested alternative: ‘cur_dist’
         if (cur_dist < closest_dist[k - 1])
                        ^~~~~~~~~~~~
                        cur_dist
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:617:37: error: ‘k’ was not declared in this scope
         if (cur_dist < closest_dist[k - 1])
                                     ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:619:32: error: ‘closest_idx’ was not declared in this scope
             insert_point_float(closest_idx, closest_dist, pidx[start_idx + i], cur_dist, k);
                                ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: In function ‘void search_splitnode_float(Node_float*, float*, uint32_t*, int8_t, float*, float, uint32_t, float, float, uint8_t*, uint32_t*, float*)’:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:652:15: error: invalid use of incomplete type ‘struct Node_float’
     dim = root->cut_dim;
               ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:659:59: error: invalid use of incomplete type ‘struct Node_float’
             search_leaf_float_mask(pa, pidx, no_dims, root->start_idx, root->n, point_coord, k, mask, closest_idx, closest_dist);
                                                           ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:659:76: error: invalid use of incomplete type ‘struct Node_float’
             search_leaf_float_mask(pa, pidx, no_dims, root->start_idx, root->n, point_coord, k, mask, closest_idx, closest_dist);
                                                                            ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:663:54: error: invalid use of incomplete type ‘struct Node_float’
             search_leaf_float(pa, pidx, no_dims, root->start_idx, root->n, point_coord, k, closest_idx, closest_dist);
                                                      ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:663:71: error: invalid use of incomplete type ‘struct Node_float’
             search_leaf_float(pa, pidx, no_dims, root->start_idx, root->n, point_coord, k, closest_idx, closest_dist);
                                                                       ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:669:41: error: invalid use of incomplete type ‘struct Node_float’
     new_offset = point_coord[dim] - root->cut_val;
                                         ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:678:54: error: invalid use of incomplete type ‘struct Node_float’
             search_splitnode_float((Node_float *)root->left_child, pa, pidx, no_dims, point_coord, dist_left, k, distance_upper_bound, eps_fac, mask, closest_idx, closest_dist);
                                                      ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:684:24: error: invalid use of incomplete type ‘struct Node_float’
         box_diff = root->cut_bounds_lv - point_coord[dim];
                        ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:693:54: error: invalid use of incomplete type ‘struct Node_float’
             search_splitnode_float((Node_float *)root->right_child, pa, pidx, no_dims, point_coord, dist_right, k, distance_upper_bound, eps_fac, mask, closest_idx, closest_dist);
                                                      ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:703:54: error: invalid use of incomplete type ‘struct Node_float’
             search_splitnode_float((Node_float *)root->right_child, pa, pidx, no_dims, point_coord, dist_right, k, distance_upper_bound, eps_fac, mask, closest_idx, closest_dist);
                                                      ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:709:43: error: invalid use of incomplete type ‘struct Node_float’
         box_diff = point_coord[dim] - root->cut_bounds_hv;
                                           ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:718:54: error: invalid use of incomplete type ‘struct Node_float’
             search_splitnode_float((Node_float *)root->left_child, pa, pidx, no_dims, point_coord, dist_left, k, distance_upper_bound, eps_fac, mask, closest_idx, closest_dist);
                                                      ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:47:12: note: forward declaration of ‘struct Node_float’
     struct Node_float *left_child;
            ^~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: In function ‘Node_double* construct_subtree_double(double*, uint32_t*, int8_t, uint32_t, uint32_t, uint32_t, double*)’:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:990:13: error: invalid use of incomplete type ‘struct Node_double’
         root->cut_dim = -1;
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:999:17: error: invalid use of incomplete type ‘struct Node_double’
             root->cut_dim = -1;
                 ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1002:13: error: invalid use of incomplete type ‘struct Node_double’
         root->cut_val = cut_val;
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1003:13: error: invalid use of incomplete type ‘struct Node_double’
         root->cut_dim = cut_dim;
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1010:13: error: invalid use of incomplete type ‘struct Node_double’
         root->cut_bounds_lv = lv;
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1011:13: error: invalid use of incomplete type ‘struct Node_double’
         root->cut_bounds_hv = hv;
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1015:13: error: invalid use of incomplete type ‘struct Node_double’
         root->left_child = (struct Node_double *)construct_subtree_double(pa, pidx, no_dims, start_idx, n_lo, bsp, bbox);
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1020:13: error: invalid use of incomplete type ‘struct Node_double’
         root->right_child = (struct Node_double *)construct_subtree_double(pa, pidx, no_dims, start_idx + n_lo, n - n_lo, bsp, bbox);
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: In function ‘Node_double* create_node_double(uint32_t, uint32_t, int)’:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1077:60: error: invalid application of ‘sizeof’ to incomplete type ‘Node_double’
         new_node = (Node_double *)malloc(sizeof(Node_double) - 2 * sizeof(Node_double *));
                                                            ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1081:60: error: invalid application of ‘sizeof’ to incomplete type ‘Node_double’
         new_node = (Node_double *)malloc(sizeof(Node_double));
                                                            ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1083:13: error: invalid use of incomplete type ‘struct Node_double’
     new_node->n = n;
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1084:13: error: invalid use of incomplete type ‘struct Node_double’
     new_node->start_idx = start_idx;
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: In function ‘void delete_subtree_double(Node_double*)’:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1095:13: error: invalid use of incomplete type ‘struct Node_double’
     if (root->cut_dim != -1)
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1097:50: error: invalid use of incomplete type ‘struct Node_double’
         delete_subtree_double((Node_double *)root->left_child);
                                                  ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1098:50: error: invalid use of incomplete type ‘struct Node_double’
         delete_subtree_double((Node_double *)root->right_child);
                                                  ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: In function ‘void print_tree_double(Node_double*, int)’:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1126:48: error: invalid use of incomplete type ‘struct Node_double’
     printf("(cut_val: %f, cut_dim: %i)\n", root->cut_val, root->cut_dim);
                                                ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1126:63: error: invalid use of incomplete type ‘struct Node_double’
     printf("(cut_val: %f, cut_dim: %i)\n", root->cut_val, root->cut_dim);
                                                               ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1127:13: error: invalid use of incomplete type ‘struct Node_double’
     if (root->cut_dim != -1)
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1128:46: error: invalid use of incomplete type ‘struct Node_double’
         print_tree_double((Node_double *)root->left_child, level + 1);
                                              ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1129:13: error: invalid use of incomplete type ‘struct Node_double’
     if (root->cut_dim != -1)
             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1130:46: error: invalid use of incomplete type ‘struct Node_double’
         print_tree_double((Node_double *)root->right_child, level + 1);
                                              ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: At global scope:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1213:42: error: expected ‘,’ or ‘...’ before ‘pa’
 void search_leaf_double(double *restrict pa, uint32_t *restrict pidx, int8_t no_dims, uint32_t start_idx, uint32_t n, double *restrict point_coord,
                                          ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: In function ‘void search_leaf_double(double*)’:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1219:21: error: ‘n’ was not declared in this scope
     for (i = 0; i < n; i++)
                     ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:20: error: ‘pa’ was not declared in this scope
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                    ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1222:38: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_double(&PA(start_idx + i, 0), point_coord, no_dims);
                                      ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:23: error: ‘no_dims’ was not declared in this scope
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                       ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1222:38: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_double(&PA(start_idx + i, 0), point_coord, no_dims);
                                      ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:33: error: ‘pidx’ was not declared in this scope
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                 ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1222:38: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_double(&PA(start_idx + i, 0), point_coord, no_dims);
                                      ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:33: note: suggested alternative: ‘pid_t’
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                 ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1222:38: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_double(&PA(start_idx + i, 0), point_coord, no_dims);
                                      ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1222:41: error: ‘start_idx’ was not declared in this scope
         cur_dist = calc_dist_double(&PA(start_idx + i, 0), point_coord, no_dims);
                                         ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:38: note: in definition of macro ‘PA’
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                      ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1222:41: note: suggested alternative: ‘strtold’
         cur_dist = calc_dist_double(&PA(start_idx + i, 0), point_coord, no_dims);
                                         ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:38: note: in definition of macro ‘PA’
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                      ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1222:60: error: ‘point_coord’ was not declared in this scope
         cur_dist = calc_dist_double(&PA(start_idx + i, 0), point_coord, no_dims);
                                                            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1224:24: error: ‘closest_dist’ was not declared in this scope
         if (cur_dist < closest_dist[k - 1])
                        ^~~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1224:24: note: suggested alternative: ‘cur_dist’
         if (cur_dist < closest_dist[k - 1])
                        ^~~~~~~~~~~~
                        cur_dist
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1224:37: error: ‘k’ was not declared in this scope
         if (cur_dist < closest_dist[k - 1])
                                     ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1226:33: error: ‘closest_idx’ was not declared in this scope
             insert_point_double(closest_idx, closest_dist, pidx[start_idx + i], cur_dist, k);
                                 ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: At global scope:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1245:47: error: expected ‘,’ or ‘...’ before ‘pa’
 void search_leaf_double_mask(double *restrict pa, uint32_t *restrict pidx, int8_t no_dims, uint32_t start_idx, uint32_t n, double *restrict point_coord,
                                               ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: In function ‘void search_leaf_double_mask(double*)’:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1251:21: error: ‘n’ was not declared in this scope
     for (i = 0; i < n; i++)
                     ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1254:13: error: ‘mask’ was not declared in this scope
         if (mask[pidx[start_idx + i]])
             ^~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1254:18: error: ‘pidx’ was not declared in this scope
         if (mask[pidx[start_idx + i]])
                  ^~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1254:18: note: suggested alternative: ‘pid_t’
         if (mask[pidx[start_idx + i]])
                  ^~~~
                  pid_t
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1254:23: error: ‘start_idx’ was not declared in this scope
         if (mask[pidx[start_idx + i]])
                       ^~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1254:23: note: suggested alternative: ‘strtold’
         if (mask[pidx[start_idx + i]])
                       ^~~~~~~~~
                       strtold
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:20: error: ‘pa’ was not declared in this scope
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                    ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1259:38: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_double(&PA(start_idx + i, 0), point_coord, no_dims);
                                      ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:23: error: ‘no_dims’ was not declared in this scope
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                       ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1259:38: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_double(&PA(start_idx + i, 0), point_coord, no_dims);
                                      ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:33: error: ‘pidx’ was not declared in this scope
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                 ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1259:38: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_double(&PA(start_idx + i, 0), point_coord, no_dims);
                                      ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:33: note: suggested alternative: ‘pid_t’
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                 ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1259:38: note: in expansion of macro ‘PA’
         cur_dist = calc_dist_double(&PA(start_idx + i, 0), point_coord, no_dims);
                                      ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1259:41: error: ‘start_idx’ was not declared in this scope
         cur_dist = calc_dist_double(&PA(start_idx + i, 0), point_coord, no_dims);
                                         ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:38: note: in definition of macro ‘PA’
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                      ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1259:41: note: suggested alternative: ‘strtold’
         cur_dist = calc_dist_double(&PA(start_idx + i, 0), point_coord, no_dims);
                                         ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:31:38: note: in definition of macro ‘PA’
 #define PA(i,d)   (pa[no_dims * pidx[i] + d])
                                      ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1259:60: error: ‘point_coord’ was not declared in this scope
         cur_dist = calc_dist_double(&PA(start_idx + i, 0), point_coord, no_dims);
                                                            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1261:24: error: ‘closest_dist’ was not declared in this scope
         if (cur_dist < closest_dist[k - 1])
                        ^~~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1261:24: note: suggested alternative: ‘cur_dist’
         if (cur_dist < closest_dist[k - 1])
                        ^~~~~~~~~~~~
                        cur_dist
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1261:37: error: ‘k’ was not declared in this scope
         if (cur_dist < closest_dist[k - 1])
                                     ^
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1263:33: error: ‘closest_idx’ was not declared in this scope
             insert_point_double(closest_idx, closest_dist, pidx[start_idx + i], cur_dist, k);
                                 ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c: In function ‘void search_splitnode_double(Node_double*, double*, uint32_t*, int8_t, double*, double, uint32_t, double, double, uint8_t*, uint32_t*, double*)’:
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1296:15: error: invalid use of incomplete type ‘struct Node_double’
     dim = root->cut_dim;
               ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1303:60: error: invalid use of incomplete type ‘struct Node_double’
             search_leaf_double_mask(pa, pidx, no_dims, root->start_idx, root->n, point_coord, k, mask, closest_idx, closest_dist);
                                                            ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1303:77: error: invalid use of incomplete type ‘struct Node_double’
             search_leaf_double_mask(pa, pidx, no_dims, root->start_idx, root->n, point_coord, k, mask, closest_idx, closest_dist);
                                                                             ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1307:55: error: invalid use of incomplete type ‘struct Node_double’
             search_leaf_double(pa, pidx, no_dims, root->start_idx, root->n, point_coord, k, closest_idx, closest_dist);
                                                       ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1307:72: error: invalid use of incomplete type ‘struct Node_double’
             search_leaf_double(pa, pidx, no_dims, root->start_idx, root->n, point_coord, k, closest_idx, closest_dist);
                                                                        ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1313:41: error: invalid use of incomplete type ‘struct Node_double’
     new_offset = point_coord[dim] - root->cut_val;
                                         ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1322:56: error: invalid use of incomplete type ‘struct Node_double’
             search_splitnode_double((Node_double *)root->left_child, pa, pidx, no_dims, point_coord, dist_left, k, distance_upper_bound, eps_fac, mask, closest_idx, closest_dist);
                                                        ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1328:24: error: invalid use of incomplete type ‘struct Node_double’
         box_diff = root->cut_bounds_lv - point_coord[dim];
                        ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1337:56: error: invalid use of incomplete type ‘struct Node_double’
             search_splitnode_double((Node_double *)root->right_child, pa, pidx, no_dims, point_coord, dist_right, k, distance_upper_bound, eps_fac, mask, closest_idx, closest_dist);
                                                        ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1347:56: error: invalid use of incomplete type ‘struct Node_double’
             search_splitnode_double((Node_double *)root->right_child, pa, pidx, no_dims, point_coord, dist_right, k, distance_upper_bound, eps_fac, mask, closest_idx, closest_dist);
                                                        ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1353:43: error: invalid use of incomplete type ‘struct Node_double’
         box_diff = point_coord[dim] - root->cut_bounds_hv;
                                           ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:1362:56: error: invalid use of incomplete type ‘struct Node_double’
             search_splitnode_double((Node_double *)root->left_child, pa, pidx, no_dims, point_coord, dist_left, k, distance_upper_bound, eps_fac, mask, closest_idx, closest_dist);
                                                        ^~
/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/_kdtree_core.c:68:12: note: forward declaration of ‘struct Node_double’
     struct Node_double *left_child;
            ^~~~~~~~~~~
ninja: build stopped: subcommand failed.

I use conda and my envirnment is below.

OS: ubuntu 18.04
GPU: RTX2080
CUDA: 10.0

[hyunynim]

When I remove all "restrict" keyword in _kdtree_code.c, setup.py working well.
But I have new error in generate.py

Traceback (most recent call last):
  File "generate.py", line 11, in <module>
    from im2mesh import config
  File "/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/config.py", line 3, in <module>
    from im2mesh import dvr
  File "/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/dvr/__init__.py", line 1, in <module>
    from im2mesh.dvr import (
  File "/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/dvr/config.py", line 3, in <module>
    from im2mesh.encoder import encoder_dict
  File "/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/encoder/__init__.py", line 1, in <module>
    from im2mesh.encoder import conv
  File "/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/encoder/conv.py", line 3, in <module>
    from im2mesh.common import normalize_imagenet
  File "/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/common.py", line 2, in <module>
    from im2mesh.utils.libkdtree import KDTree
  File "/home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/__init__.py", line 1, in <module>
    from .pykdtree.kdtree import KDTree
ImportError: /home/hongza/lab/differentiable_volumetric_rendering/im2mesh/utils/libkdtree/pykdtree/kdtree.cpython-38-x86_64-linux-gnu.so: undefined symbol: construct_tree_double

• Add1

And I also edit name of struct in _kdtree_core.c

typedef struct
{
...
} Node_float;

to

typedef struct Node_float
{
...
} Node_float;

• Add2

When I replace all "restrict" to "__restrict", it also working well.
But I still get an error in generate.py.

[trancelestial]

Hi, have you in the meantime found a way to solve this issue?

[hyunynim]

Hi, have you in the meantime found a way to solve this issue?

No I don't yet

[ShunChengWu]

Pytorch tries to use c++ compiler to compile a c project.
an easy hack for this is to set your CXX to gcc
CC=gcc CXX=gcc python setup.py build_ext --inplace

of course, this may cause errors on other modules. try to compile them separately.
i.e. comment out pykdtree first and run
python setup.py build_ext --inplace,
then comment out all others except pykdtree and run again with
CC=gcc CXX=gcc python setup.py build_ext --inplace

[DaddyWesker]

I have the same error. Unfortunately, easy hack mentioned above doesn't work either. I've managed to run python setup.py build_ext --inplace after commenting pykdtree in ext_modules, but i am unable to build kdtree separately.