When Building Snips NLU, crfsuite is missing

[utkarshx]

While building snips, it is showing the following error message. I tried putting extern also but no help.

error[E0432]: unresolved import crfsuite_sys::crfsuite_create_instance_from_memory
--> /home/utkarsh/.cargo/git/checkouts/crfsuite-rs-f6b1ef64eb0006ea/8ade2f8/src/lib.rs:12:5
|
12 | use crfsuite_sys::crfsuite_create_instance_from_memory;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no crfsuite_create_instance_from_memory in the root

error[E0425]: cannot find function crfsuite_instance_init_n in crate crfsuite_sys
--> /home/utkarsh/.cargo/git/checkouts/crfsuite-rs-f6b1ef64eb0006ea/8ade2f8/src/lib.rs:140:27
|
140 | crfsuite_sys::crfsuite_instance_init_n(&mut inst, input.len() as libc::c_int);
| ^^^^^^^^^^^^^^^^^^^^^^^^ not found in crfsuite_sys

error[E0412]: cannot find type c_int in crate libc
--> /home/utkarsh/.cargo/git/checkouts/crfsuite-rs-f6b1ef64eb0006ea/8ade2f8/src/lib.rs:140:84
|
140 | crfsuite_sys::crfsuite_instance_init_n(&mut inst, input.len() as libc::c_int);
| ^^^^^ not found in libc
|
help: consider importing this type alias
|
1 | use std::os::raw::c_int;
|

error[E0425]: cannot find function crfsuite_item_init in crate crfsuite_sys
--> /home/utkarsh/.cargo/git/checkouts/crfsuite-rs-f6b1ef64eb0006ea/8ade2f8/src/lib.rs:148:36
|
148 | unsafe { crfsuite_sys::crfsuite_item_init(inst_item) };
| ^^^^^^^^^^^^^^^^^^ not found in crfsuite_sys

error[E0425]: cannot find function crfsuite_attribute_set in crate crfsuite_sys
--> /home/utkarsh/.cargo/git/checkouts/crfsuite-rs-f6b1ef64eb0006ea/8ade2f8/src/lib.rs:157:39
|
157 | crfsuite_sys::crfsuite_attribute_set(cont, aid, inner_item.get_value())
| ^^^^^^^^^^^^^^^^^^^^^^ not found in crfsuite_sys

error[E0425]: cannot find function crfsuite_item_append_attribute in crate crfsuite_sys
--> /home/utkarsh/.cargo/git/checkouts/crfsuite-rs-f6b1ef64eb0006ea/8ade2f8/src/lib.rs:159:44
|
159 | unsafe { crfsuite_sys::crfsuite_item_append_attribute(inst_item, cont) };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in crfsuite_sys

error[E0425]: cannot find function crfsuite_instance_finish in crate crfsuite_sys
--> /home/utkarsh/.cargo/git/checkouts/crfsuite-rs-f6b1ef64eb0006ea/8ade2f8/src/lib.rs:170:31
|
170 | crfsuite_sys::crfsuite_instance_finish(&mut inst);
| ^^^^^^^^^^^^^^^^^^^^^^^^ not found in crfsuite_sys

error[E0425]: cannot find function crfsuite_instance_finish in crate crfsuite_sys
--> /home/utkarsh/.cargo/git/checkouts/crfsuite-rs-f6b1ef64eb0006ea/8ade2f8/src/lib.rs:176:27
|
176 | crfsuite_sys::crfsuite_instance_finish(&mut inst);
| ^^^^^^^^^^^^^^^^^^^^^^^^ not found in crfsuite_sys

error: aborting due to 8 previous errors