[Scons-users] Building D release and tests

[Bill Deegan]

If you build the same binary into the same tree with different flag then
you're doing something wrong and scons should and does flag this.

In your example, you should use a diffferent build dir for tests if they
need to e built with different flags..

On Tue, Apr 11, 2017 at 6:48 AM, Russel Winder <russel at winder.org.uk> wrote:

> OK, I think I finally twigged that the D tools are broken. Sorry I was
> so slow.
>
> I shall construct a test and then a fix. And then a pull request which
> hopefully can get accepted quickly.
>
>
>
> On Tue, 2017-04-11 at 09:56 +0100, Russel Winder wrote:
> > If you try to use SCons to build release code and test code, life
> > gets
> > very complicated, and I think shows that whilst variant builds may
> > not
> > be broken, they are not easy to use. (Meson and CMake make this
> > relatively easy.)
> >
> > To build out-of-tree (the only sane way) a release, I compile
> > source/main.d with an environment that turns on all the
> > optimisations.
> >
> > To build the unittests (out-of-tree obviously), I compile
> > source/main.d
> > with different environment.
> >
> > This causes problems because SCons sees the source/main.o twice in
> > the
> > tree and says
> >
> > scons: *** Two environments with different actions were specified for
> > the same target:
> > /home/users/russel/Repositories/Git/Masters/ApproxGC_D/source/main.o
> > (action 1: ldc2
> > -I=/home/users/russel/Repositories/Git/Masters/ApproxGC_D -O -c
> > -of=main.o main.d)
> > (action 2: ldc2
> > -I=/home/users/russel/Repositories/Git/Masters/ApproxGC_D -unittest
> > -c -of=main.o main.d)
> > File
> > "/home/users/russel/Repositories/Git/Masters/ApproxGC_D/SConscripts/U
> > nitTests", line 3, in <module>
> >
> > The problem here seems to be that the fact that the rule is in the
> > context of a variant build is not being taken into account. One rule
> > is
> > making Build/Release/source/main.o the other
> > Build/UnitTests/source/main.o, but the build DAG appears not to know
> > this.
> >
> > I have just put the code up on GitHub if anyone has time to take a
> > peek
> > at this.
> >
> > https://github.com/russel/ApproxGC
> >
> --
> Russel.
> ============================================================
> =================
> Dr Russel Winder      t: +44 20 7585 2200   voip:
> sip:russel.winder at ekiga.net
> 41 Buckmaster Road    m: +44 7770 465 077   xmpp: russel at winder.org.uk
> London SW11 1EN, UK   w: www.russel.org.uk  skype: russel_winder
>
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