[Interest] Excluding examples from make in dev dir

[Patrick Stinson]

Excellent scholarship, Giuseppe. A much needed quality in the world of software.

> On Feb 24, 2017, at 3:21 PM, Giuseppe D'Angelo <giuseppe.dangelo at kdab.com> wrote:
> 
> Il 24/02/2017 23:41, Patrick Stinson ha scritto:
>> Right, I thought that this would take care of this as well, but it turns out that it doesn’t restrict examples. Or, at least it doesn’t restrict examples for cleaning.
> 
> Smells like a philosophical issue / arbitrary decision.
> 
> -nomake examples excludes the examples from the Makefile's default
> target, but not from the "all" target, and not from the "clean" target.
> In other words a target for them is still created and usable in the
> Makefile. In this sense, I guess "clean" is interpreted to clean the
> products of the "all" target, not of the default one.
> 
> For comparison, GNU says that "clean" should:
> 
>> Delete all files that are normally created by running make. [1]
> 
>> Delete all files in the current directory that are normally created by building the program. Also delete files in other directories if they are created by this makefile. [2]
> 
> I interpret this as *not* what we're currently doing, but as I said,
> it's an arbitrary decision.
> 
> ANYHOW: we're also in 2017, so if you really want a very fast clean,
> clone from git and run a git clean -dffx or similar.
> 
>> [1] https://www.gnu.org/software/make/manual/html_node/Goals.html
>> [2] https://www.gnu.org/software/make/manual/html_node/Standard-Targets.html#Standard-Targets
> 
> Hope this helps,
> -- 
> Giuseppe D'Angelo | giuseppe.dangelo at kdab.com | Senior Software Engineer
> KDAB (UK) Ltd., a KDAB Group company | Tel: UK +44-1625-809908
> KDAB - Qt, C++ and OpenGL Experts
>