Missing xdr symbols

[Bradley M. Froehle]

The (static) libc.a on Precise and Quantal seems to be missing the xdr symbols.

$ apt-cache policy libc6-dev
libc6-dev:
  Installed: 2.15-0ubuntu10.2
  Candidate: 2.15-0ubuntu10.2
  Version table:
     2.15-0ubuntu10.4 0
        400 http://us.archive.ubuntu.com/ubuntu/ precise-proposed/main amd64 Packages
     2.15-0ubuntu10.3 0
        900 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
 *** 2.15-0ubuntu10.2 0
        990 http://us.archive.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
        100 /var/lib/dpkg/status
     2.15-0ubuntu10 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
$ nm /usr/lib/x86_64-linux-gnu/libc.a 2>/dev/null | grep xdr_free
$

This makes linking with libnsl.a impossible:
$ nm /usr/lib/x86_64-linux-gnu/libnsl.a | grep xdr_free
                 U xdr_free
                 U xdr_free
                 U xdr_free
                 U xdr_free
                 U xdr_free
                 U xdr_free

As far as I can tell this bug first appeared in Precise and appears to have been resolved in Raring:

$ wget -q http://mirror.pnl.gov/ubuntu//pool/main/e/eglibc/libc6-dev_2.17-0ubuntu4_amd64.deb
$ dpkg -x libc6-dev_2.17-0ubuntu4_amd64.deb .
$ nm usr/lib/x86_64-linux-gnu/libc.a 2>/dev/null | grep xdr_free
00000000000000e0 T xdr_free