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Plan for future x32 ABI support

2012-05-11 10:00..10:45 in Jr. Ballroom 1

The x32 ABI (http://sites.google.com/site/x32abi/) provides a compromise between IA32 and x86-64: it has a 32-bit pointer size, which is more memory-efficient and may often be faster, but has 64-bit registers and a larger register file. Support for it is gradually trickling into various relevant upstreams (kernel, glibc, gcc, etc.). Although the pieces are unlikely to be in place in time for 12.10, we should think ahead for how we might deploy this in Ubuntu.