Building and Iterating

[Bryan Drewery]

On 6/1/2018 10:20 AM, Sean Bruno wrote:
> Before I dive into the mk files of a buildworld, I'd like to describe
> "what I want" so as to start a discussion of my goal.
> 
> 1.  If I select no toolchain (WITHOUT_TOOLCHAIN), but clang needs to be
> built, only build a toolchain that targets the ARCH being requested.
> 
> 2.  If I select no toolchain (WITHOUT_TOOLCHAIN), but clang needs to be
> built, give me a knob to turn that aborts the build with a meaningful
> message that lets me know I need to update the toolchain on my buildbox.
> 

https://reviews.freebsd.org/D11077 has this but I suspect it's wildly
stale already.

Also having a knob like this would ultimately lead to someone making
their /usr/bin/cc less useful for optimizations like WITH_SYSTEM_COMPILER.

> 3.  If the boostrap toolchain needs to be built in the normal case, only
> target the ARCH being requested.  I understand that we "want" a CC
> installed that targets all architectures and this is something I agree with.
> 

Hm yes there is no real reason to have multi-arch support in the
WORLDTMP compiler.  Though I do have a pending patch to build clang
*once* for universe that relies on this full-arch-support behavior but
I'm sure it's trivial to continue using it for that piece.


-- 
Regards,
Bryan Drewery

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