[Bug 265241] Runaway builds on armv6, armv7 in port cad/iverilog

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265241

--- Comment #18 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to Ed Maste from comment #17)

Cool.

Then, is there a reason that the problematical qemu technique
of covering the building armv7 ports is still in use instead
of having some eMAG(s) use a armv7 poudriere jail?


Treating armv6 as less important at this stage . . . why . . .

Covering armv6 as well (without qemu use) gets into having an
alternate kernel that is based on instead using:

#define MACHINE_ARCH32  "armv6"

in sys/arm64/include/param.h . That would make it a boot-kernel
choice for which of armv7 vs. armv6 can be done without qemu
--and a matching poudriere jail could be used for armv6 when
booted for armv6 support.

But, not a likely way to set up/handle a build server. Having
an eMAG permanently with such a special kernel could limit its
other uses. So, likely, just armv7 coverage (the default
MACHINE_ARCH32) via an armv7 poudriere jail.

(I had some notes on this from having helped someone establish
an armv6 poudriere jail context, where they could reasonably
control the boot-kernel via reboots as needed and they could
build both styles of kernels for themselves.)

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