This program:

<pre>
  // tst.cpp
  #include &lt;pwd.h&gt;        // getpwuid, struct passwd
  int main()
  {
    getpwuid(0);
    return 0;
  }
</pre>

And this compile command:

<pre>
  g++ -static tst.cpp
</pre>

Produces this error message:
<pre>
Undefined			first referenced
 symbol  			    in file
dlclose                             /usr/lib/libc.a(nss_deffinder.o)
dlsym                               /usr/lib/libc.a(nss_deffinder.o)
dlopen                              /usr/lib/libc.a(nss_deffinder.o)
ld: fatal: Symbol referencing errors. No output written to a.out
collect2: ld returned 1 exit status
</pre>

It's not clear (to me at least) why this happens..