Me also getting the same kind of errors in Visual Studio 2019(16.11.18).

When I have run this code

```
/* -*- mode: C -*- */
/*
IGraph library.
Copyright (C) 2008-2012 Gabor Csardi <csardi.gabor@gmail.com>
334 Harvard street, Cambridge, MA 02139 USA
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include <igraph.h>
int print_matrix(const igraph_matrix_t* m) {
igraph_integer_t nrow = igraph_matrix_nrow(m);
igraph_integer_t ncol = igraph_matrix_ncol(m);
igraph_integer_t i, j;
igraph_real_t val;
for (i = 0; i < nrow; i++) {
printf("%" IGRAPH_PRId ":", i);
for (j = 0; j < ncol; j++) {
val = MATRIX(*m, i, j);
if (igraph_is_inf(val)) {
if (val < 0) {
printf("-inf");
}
else {
printf(" inf");
}
}
else {
printf(" %3.0f", val);
}
}
printf("\n");
}
return 0;
}
int main() {
igraph_t g;
igraph_vector_t weights;
igraph_real_t weights_data[] = { 0, 2, 1, 0, 5, 2, 1, 1, 0, 2, 2, 8, 1, 1, 3, 1, 1, 4, 2, 1 };
igraph_matrix_t res;
igraph_small(&g, 10, IGRAPH_DIRECTED,
0, 1, 0, 2, 0, 3, 1, 2, 1, 4, 1, 5,
2, 3, 2, 6, 3, 2, 3, 6,
4, 5, 4, 7, 5, 6, 5, 8, 5, 9,
7, 5, 7, 8, 8, 9,
5, 2,
2, 1,
-1);
igraph_vector_view(&weights, weights_data,
sizeof(weights_data) / sizeof(weights_data[0]));
igraph_matrix_init(&res, 0, 0);
igraph_distances_dijkstra(&g, &res, igraph_vss_all(), igraph_vss_all(),
&weights, IGRAPH_OUT);
print_matrix(&res);
igraph_matrix_destroy(&res);
igraph_destroy(&g);
return 0;
}
```

I am getting following errors:

1>------ Build started: Project: igraph, Configuration: Debug Win32 ------

1>1.obj : error LNK2019: unresolved external symbol _igraph_is_inf referenced in function _print_matrix

1>1.obj : error LNK2019: unresolved external symbol _igraph_vector_view referenced in function _main

1>1.obj : error LNK2019: unresolved external symbol _igraph_matrix_init referenced in function _main

1>1.obj : error LNK2019: unresolved external symbol _igraph_matrix_destroy referenced in function _main

1>1.obj : error LNK2019: unresolved external symbol _igraph_matrix_nrow referenced in function _print_matrix

1>1.obj : error LNK2019: unresolved external symbol _igraph_matrix_ncol referenced in function _print_matrix

1>1.obj : error LNK2019: unresolved external symbol _igraph_vss_all referenced in function _main

1>1.obj : error LNK2019: unresolved external symbol _igraph_destroy referenced in function _main

1>1.obj : error LNK2019: unresolved external symbol _igraph_small referenced in function _main

1>1.obj : error LNK2019: unresolved external symbol _igraph_distances_dijkstra referenced in function _main

1>I:\Programs\igraph\igraph\Debug\igraph.exe : fatal error LNK1120: 10 unresolved externals

1>Done building project “igraph.vcxproj” – FAILED.

========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Could someone help me?