[armel/armhf] handling of multiarch paths missing, depending on -mfloat-abi

e.g. for a native build on armel, the armhf directories should be searched if -mfloat-abi=hard is present.

I took a look at doing this, but as far as I can see gcc 4.6 isn't even being built as a multilib toolchain currently:

gcc -print-multi-lib
.;

I know what to do with the multilib directory itself in the config to make this happen, but I'm afraid I don't understand multilib itself well enough to be confident that this would all get built correctly. After all, we need the toolchain to build a separate copy of libgcc and libstdc++ and install that to the correct place, right? That seems to be a prerequisite for pointing it at the multiarch paths for linking, which is comparatively easy.

This bug was fixed in the package gcc-defaults - 1.107ubuntu3

---------------
gcc-defaults (1.107ubuntu3) oneiric; urgency=low

  * Build the -multilib packages for armel/armhf. LP: #810360.
 -- Matthias Klose <email address hidden> Wed, 20 Jul 2011 09:38:27 +0200

This bug was fixed in the package eglibc - 2.13-9ubuntu3

---------------
eglibc (2.13-9ubuntu3) oneiric; urgency=low

  * Build libc6-armhf and libc6-dev-armhf packages on armel. LP: #810360.
  * Build using GCC 4.6 on armel.
  * Add an empty directory /usr/lib/<multiarch> in the biarch -dev packages,
    needed by GCC to resolve names relative to this path.
 -- Matthias Klose <email address hidden> Wed, 20 Jul 2011 15:22:21 +0200

This bug was fixed in the package gcc-4.6 - 4.6.1-4ubuntu2

---------------
gcc-4.6 (4.6.1-4ubuntu2) oneiric; urgency=low

  * Update to SVN 20110720 (r176494) from the gcc-4_6-branch.
    - Fix PR target/49541, PR tree-optimization/49768, PR middle-end/49675,
      PR target/49746, PR middle-end/49732, PR tree-optimization/49725,
      PR target/49723, PR target/49541, PR tree-opt/49309, PR c++/49785,
      PR ada/48711, PR ada/46350, PR fortran/49648, PR testsuite/49753,
      PR tree-optimization/49309.
  * Update the Linaro support to the 4.6-2011.07-0 release.
    - Fix PR target/49335. LP: #791327.
  * Update gcc-multiarch:
    - Add -print-multiarch option.
    - Fix library path for non-default multilib(s).
    - Handle `.' in MULTILIB_DIRNAMES.
  * Add support to build multilib on armel and armhf, only enable it for
    Ubuntu/oneiric. LP: #810360.
 -- Matthias Klose <email address hidden> Wed, 20 Jul 2011 17:44:32 +0200