src/libbson/src/bson/bson-memory.c:38:11: error: implicit declaration of function 'aligned_alloc' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
   return aligned_alloc (alignment, num_bytes);
          ^
src/libbson/src/bson/bson-memory.c:38:11: error: incompatible integer to pointer conversion returning 'int' from a function with result type 'void *' [-Werror,-Wint-conversion]
   return aligned_alloc (alignment, num_bytes);
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.