build with --enable-checking=release

I have attached a patch in case this helps to get a bug noticed.

This bug was fixed in the package gcc-4.5 - 4.5.1-1ubuntu2

---------------
gcc-4.5 (4.5.1-1ubuntu2) maverick; urgency=low

  * Build from the Linaro 4.5-2010.08-1 release on amd64, armel, i386
    and powerpc.
  * Update to SVN 20100813 (r163226) from the gcc-4_5-branch.
    - Fix PR target/41089, PR tree-optimization/44914, PR c++/45112,
      PR fortran/44929, PR middle-end/45262, PR debug/45259, PR debug/45055,
      PR target/44805, PR middle-end/45034, PR tree-optimization/45109,
      PR boehm-gc/34544, PR target/44942, PR fortran/31588, PR fortran/43954,
      PR fortran/44660, PR fortran/42051, PR fortran/44064, PR fortran/45151,
      PR libstdc++/44963.

  [ Matthias Klose ]
  * Allow overwriting of the PF macro used in the build from the environment
    (Jim Heck). Closes: #588381.
  * Fix libc-dbg build dependency for java enabled builds. Addresses: #591424.
  * gcj: Align data in .rodata.jutf8.* sections, patch taken from the trunk.
  * Configure with --enable-checking+release. LP: #612822.
  * Add the complete packaging to the -source package. LP: #608650.
  * Drop the gcc-ix86-asm-generic32.diff patch.

  [ Steve Langasek ]
  * s,/lib/,/$(libdir)/, throughout debian/rules*; a no-op in the current
    case, but required for us to find the libraries when building for
    multiarch
  * Don't append multiarch paths to any multilib paths except for the default;
    our biarch (multilib) builds need to remain independent of multiarch in
    the near term, so we want to make sure we can find /usr/lib32 without
    /usr/lib/i486-linux-gnu being available.
  * debian/control.m4, debian/rules.conf: conditionally set packages to be
    Multi-Arch: yes when MULTIARCH is defined.

  [ Marcin Juszkiewicz ]
  * Allow building intermediate stages for cross builds. LP: #603497.
 -- Matthias Klose <email address hidden> Sat, 14 Aug 2010 18:10:45 +0200