ABI / dynamic list now on wiki

[Joseph S. Myers]

https://sourceware.org/glibc/wiki/ABIList

now lists what I think are the 64 incompatible (architecture, ABI) 
combinations supported by glibc (soon to be 63 once we remove am33, but 
will go up as new cases such as AArch64 ILP32 (2 ABIs), and MIPS o32 
-mfp64 (4 ABIs), are added to glibc, as well as with new architectures).

I've chosen to list for every ABI whether it's hard or soft float, and 
what endianness, but only to mention whether it's 32-bit or 64-bit in 
cases of 64-bit architectures (but to do so whether or not both 32-bit and 
64-bit ABIs are supported ... in the IA64 case, ILP32 exists but not with 
Linux, and for HPPA, 64-bit exists but not for Linux userspace).

Would architecture maintainers please check the lists of ABIs for their 
architectures?  Especially for alpha, hppa, classic m68k, s390 and sparc 
(confirmation about non-use of soft-float configurations wanted) and for 
microblaze (confirmation about hard- and soft-float ABIs being the same 
and both endiannesses being in use wanted), but it's a good idea for other 
architectures as well.

Could whoever maintains the list of Debian multiarch triplets 
<https://wiki.debian.org/Multiarch/Tuples> please make sure they are 
unambiguous regarding which ABI is referred to (when it's an ABI on this 
list)?  (In particular, I note that the big-endian ARM entries there fail 
to distinguish between BE8 and BE32, but those two require completely 
separate sets of executables and shared libraries; only unlinked .o files 
are compatible between the two big-endian variants.)  I'd also encourage 
the maintainer of the Linaro list to link to the glibc wiki page.

-- 
Joseph S. Myers
joseph@codesourcery.com