svn commit: r392209 - in head/devel: . p5-Minilla

[Baptiste Daroussin]

On Thu, Jul 16, 2015 at 01:43:06AM +0000, Alexey Dokuchaev wrote:
> On Wed, Jul 15, 2015 at 10:38:33PM +0200, Mathieu Arnold wrote:
> > +--On 15 juillet 2015 20:17:14 +0000 Dmitry Marakasov <amdmi3 at FreeBSD.org>
> > wrote:
> > 
> > | +RUN_DEPENDS:=	${BUILD_DEPENDS}
> > 
> > Please, do *not* use := for depends, it is wrong.
> > <https://www.freebsd.org/doc/en/books/porters-handbook/makefile-depend.html>
> 
> Can you clarify on what is wrong with := ?  I've added IMHO quite clear and
> elaborate explanation in the PH on the matter, and I don't see the merit of
> using MY_DEPENDS at all: it's ugly, it's hard to read, it pollutes namespace
> for no sound reason.
> 
> People should learn their tools instead of inventing obscure workarounds.
> 
:= enforce the expansion to happen right away

Let's say you have:

RUN_DEPENDS=	${BLOODYSCRIPTLANGUAGEPREFIX}bal>0:${PORTSDIR}/somewhere/bla
BULID_DEPENDS:=	${RUN_DEPENDS}

.include <bsd.port.mk>


BULID_DEPENDS will magically have ${BLOODYSCRIPTLANGUAGEPREFIX} expanded to ""
because it is not yet defined at the moment the expansion is requested.

Bapt
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