On Jan 5, 2017 9:03 AM, "Jonathan Wakely" <jwakely@xxxxxxxxxxxxxxxxx> wrote:.
Which changes how software is built, surely.
The main
difference would be installation/deployment. The idea would be that instead of
the 32-bit and 64-bit runtimes being installed directly in parallel on the base
system, they would instead be installed into effectively a chroot with its own
completely 32-bit runtime.
Tom's use case is where you simply invoke "gcc -m32" on the base
system and (assuming the relevant 32-bit versions of the libs are
present in /usr/lib) it Just Works.
If the 32-bit headers and libs aren't present on the base system then
you have to change how the software is built.
The Linux kernel needs gcc -m32 to work for freestanding programs.
Linux's x86 test suite likes normal glibc programs built with gcc -m32 to work.
--Andy
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