how to properly enable multilib builds?

[Matthias Klose]

Hi,

the current gcc-4.6 packages build for both softfp and hard, so that the armel
and (not yet existing) armhf packages can be installed together in the system.
To enable multilib, I currently use the rather complicated arm-multilib.diff,
which works, but doesn't seem to be correct. With the much simpler arm-ml2.diff,
the directory for the default multilib is not resolved to . (as done for e.g.
amd64).

[amd64] $ gcc -print-multi-directory
.

[armel] $ gcc -print-multi-directory
sf

If I understand the code correctly, this comes from the hard setting of
MULTILIB_DEFAULTS in the arm target. If you look at mips, you see

#ifndef MULTILIB_DEFAULTS
#define MULTILIB_DEFAULTS \
    { MULTILIB_ENDIAN_DEFAULT, MULTILIB_ISA_DEFAULT, MULTILIB_ABI_DEFAULT }
#endif

which records the proper selected defaults.

Should something similiar be done for arm?

  Matthias

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