svn commit: r316622 - head/share/mk

[John Baldwin]

On Friday, April 07, 2017 02:38:16 PM Warner Losh wrote:
> The TARGET_CPUTYPE=mips3 likely should be the default in the build
> system. We require mips3 or better ISA for our O32 ABI. Since we
> require that, making the user set this always is a friction point that
> we should file off. It's not like any other architecture. I'll look at
> making that the overridable default if I can find a few minutes
> sometime.

This one in particular is kind of tricky because clang refuses to
compile O32 MIPS if you set -march=mips3 (it works if you use mips2
or if you leave off the '-march' entirely).  I had played with trying
to cater to this by setting default CPUCFLAGS if CPUTYPE was empty
but then ran into the problem that clang would need a different setting
from GCC and punted.

Also, the way we set CFLAGS for alternate lib builds (lib32, etc.)
is kind of hackish.  Possibly they should be invoking bsd.cpu.mk
with a different TARGET_ARCH to avoid duplicating logic.

-- 
John Baldwin