Re: Bug#894965: dpkg-architecture should stop warning about unset CC

[<tomas@tuxteam.de>]

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On Thu, Apr 05, 2018 at 05:46:18PM +0200, Helmut Grohne wrote:

Hi, Helmut -- and sorry for taking the CC off the bug:
if it feels rude to you, double sorry, but I felt queasy
to spam the bug itself with my newbie questions: I already
did, perhaps once too much :)

> Package: dpkg-dev
> 
> On Thu, Apr 05, 2018 at 04:28:48PM +0200, tomas@tuxteam.de wrote:
> > - Need to set CC
> > 
> > Yes, the warning was clear enough, but I was a bit surprised
> > I had to set CC like so:
> 
> The warning you are talking about likely is this one:
> 
> | dpkg-architecture: warning: specified GNU system type $DEB_HOST_GNU_TYPE does not match CC system type $DEB_BUILD_GNU_TYPE, try setting a correct CC environment variable

Yes, exactly.

> I think this warning is obsolete as we assume that the packaging sets up
> CC. For most cases, it actually happens automatically:
>  * dh_auto_build passes it to make.
>  * If you include /usr/share/dpkg/buildtools.mk in debian/rules, it'll
>    be correct.

Hm. I can't find that file. Apt-file (and packages.debian.org) can't
either?

>  * For many build systems, setting CC is not necessary and
>    dh_auto_configure does the right thing anyway.

Yes, but how do I find out why it is failing in my case?

I'm reading now https://wiki.debian.org/Multiarch, that will
take a while anyway, but FWIW, such an error message can be
helpful -- it was in my case [1] (if it doesn't interfere with
the normal course of things: you seem to suggest it does).

Cheers & thanks

[1] the build system *was* using the wrong compiler, i.e. x86_64
   instead of armhf.
- -- tomás
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