nativecall-c-3

/*test.c */

#include <stdio.h>
#include <string.h>

int count(char *String)
{
     return strlen(String);
}

int count_char(char *String, char toSearch)
{
    int i, count;

    count = 0;
    i=0;
    while(String[i] != '\0')
    {
        /*
         * If character is found in string then
         * increment count variable
         */
        if(String[i] == toSearch)
        {
            count++;
        }

        i++;
    }

    return count;
}


# Raku code

use NativeCall;
sub count(Str) returns int32 is native('libtest') { * };
sub count_char(Str, Str) returns int32 is native('libtest') { * };
say count("nativecall");
say count_char("nativecall", "a")


# While count works , count_char doesn't. How can I make it work?
# I am in windows 10, and the dynamic library generated is libtest.dll