According to the SWIG document in PMunch's posts, when you call C function with
variable length arguments, the number of arguments as well are their types and
sizes must be known for C compiler. So, you cannot pass a sequence to such a C
function as variable length arguments because the length of sequence is unknown
at compile time.
You need to manually expand seq like `printf("%d, %d\n", myseq[0], myseq[1])`
or find similar C function that takes a pointer to an array instead of variable
length arguments. If the number of arguments you want to pass is known at
compile time, you can put them in an array instead of a seq and use macro like
this: <https://demotomohiro.github.io/littlesugar/unpackToArgs.html>
<https://github.com/demotomohiro/littlesugar/blob/main/src/littlesugar/unpackToArgs.nim>
