$ strace ./foo 2>&1 | grep -i readline
stat("/usr/lib64/chicken/7/readline.scm", 0x7fff9e58a320) = -1 ENOENT (No such file or directory)
stat("./readline.scm", 0x7fff9e589570)  = -1 ENOENT (No such file or directory)
write(2, "readline", 8readline)                 = 8
$