[Scons-dev] This morning's WTF moment

[Kenny, Jason L]

SO I am all for improving the Tools logic. This was a big part of the work I did in Parts. Given what I have, I know there are some more tweaks I would like to make.

Is there a process in how to add proposal to this wiki page. I know I would like to propose a possible infra set of objects to make it easier to find and set up a working tools environment. ( ie what is need to run command correctly)

Also a general statement. Do we want to say SCons errors or warns when a tool in a toolchain is not found. I have taken a view that it should error out with information. ( for example the user might have stated they want icc v12.1, parts might error out given that it is not installed tell the user that 13.1 was found not 12.1). I have found that warnings turn to noise more often than not and are ignored ( or missed as the text just scrolls to fast). When the “error” does happen later ( and it will) the user is annoyed that had time wasted.

For me it seems to me that is a toolchain is not resolvable we need to error.

I would also state that we want to allow define one toolchain per env. Some toolchains cannot be mixed. And having a different env just makes it work better. D and C++ seems to a common case here. However this is more complex, as different chains could be mixed as they are independent. Being able to define what toolchain to use up front, vs having a default chain ( which takes time and is a result of certain annoying warning on windows at time) seem to be a good solution, as we can provide chains, and allow then chain to complain is there are known incompatible issues.

Jason



From: Scons-dev [mailto:scons-dev-bounces at scons.org] On Behalf Of Gary Oberbrunner
Sent: Saturday, September 6, 2014 8:09 AM
To: SCons developer list
Subject: Re: [Scons-dev] This morning's WTF moment


On Sat, Sep 6, 2014 at 8:41 AM, anatoly techtonik <techtonik at gmail.com<mailto:techtonik at gmail.com>> wrote:
> I disagree.  I am currently taking action on it.  There is some
> documentation on the wiki describing my direction, and I'm writing some test
> code to explore further.

I am afraid you're the only one who knows what you're doing. =) If you
could paste a reference to this specific wiki location, I could change
my mind, but so far I am definitely not in the list of people who are
able to track this progress.

http://www.scons.org/wiki/ToolchainRevamp (and related sub-pages).  There was some mailing list discussion which I wanted to cut and paste into the discussion page but didn't get around to that yet.  Admittedly this is not 100% up to date but it describes the general approach I'm investigating.

I have a separate repo where I'm working on some test implementations, starting with a basic test framework for a new Tool base class and a ToolRegistry (my tasks for this weekend if I can get enough time).  But it's nowhere near ready to share, which is why I just posted some pseudocode on that wiki page.  I need to strike a balance between sharing the design and being transparent so people can give feedback, and trying things out.

--
Gary
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