_paulc

    from dnslib import DNSRecord,DNSError,QTYPE
    
    ROOT_NS='198.41.0.4'
    
    def find_cname(a,qtype,cname):
        for r in a.rr:
            if QTYPE[r.rtype] == qtype and r.rname == cname:
                return str(r.rdata)
            elif QTYPE[r.rtype] == 'CNAME' and r.rname == cname:
                return find_cname(a,qtype,str(r.rdata))
        return resolve(str(r.rdata),qtype,ROOT_NS)
    
    def resolve(name,qtype='A',ns=ROOT_NS):
        print(f"dig -r @{ns} {name} {qtype}")
        q = DNSRecord.question(name,qtype)
        a = DNSRecord.parse(q.send(ns))
        if q.header.id != a.header.id:
            raise DNSError('Response transaction id does not match query transaction id')
        for r in a.rr:
            if QTYPE[r.rtype] == qtype and r.rname == name:
                return str(r.rdata)
            elif QTYPE[r.rtype] == 'CNAME' and r.rname == name:
                return find_cname(a,qtype,str(r.rdata))
        for r in a.ar:
            if QTYPE[r.rtype] == 'A':
                return resolve(name,qtype,str(r.rdata))
        for r in a.auth:
            if QTYPE[r.rtype] == 'NS':
                return resolve(name,qtype,resolve(str(r.rdata),'A',ROOT_NS))
        raise ValueError("Cant resolve domain")
    
    if __name__ == '__main__':
        import sys
        def get_arg(i,d):
            try: return sys.argv[i]
            except IndexError: return d
        print(resolve(get_arg(1,"google.com"), get_arg(2,"A"), get_arg(3,ROOT_NS)))

  $ cat hello.nim
  stdout.write("hello, world!\n")

  $ nim --gcc.exe:musl-gcc --gcc.linkerexe:musl-gcc --passL:-static c -d:release hello.nim
  $ ldd ./hello
  not a dynamic executable

  Execution Time: 0m0.002s (real)
  Total Syscalls: 16
  Unique Syscalls: 8
  Size (KiB): 95K (78K stripped)

  $ nim c -d:release hello.nim
  $ ldd ./hello
  linux-vdso.so.1 =>  (0x00007ffc994b6000)
  libdl.so.2 => /lib64/libdl.so.2 (0x00007f7c88785000)
  libc.so.6 => /lib64/libc.so.6 (0x00007f7c883b8000)
  /lib64/ld-linux-x86-64.so.2 (0x00007f7c88989000)

  Execution Time: 0m0.002s (real)
  Total Syscalls: 42
  Unique Syscalls: 13
  Size (KiB): 91K (79K stripped)