Bug#793404: massive waste of CPU time in debian/rules by inline commands

[Jakub Wilk <jwilk@debian.org>]

* Eduard Bloch <edi@gmx.de>, 2015-07-23, 19:43:
> The problem: I see lots of $(shell ...) stuff. In boost, there are 
> about 12 such calls. And they run dpkg-architecture or 
> dpkg-parsechangelogs or similar commands. When this was done a just 
> couple of times (i.e. before dh(7)), that's acceptable. But now, it 
> looks like debian/rules is called many, many times through dh.

One mistake boost makes is using ":=" instead of plain "=". Contrary to 
popular belief, the former almost always causes more evaluation of 
$(shell) stuff, specially when dh is involved.

Anyway, in my packages, I fixed all problems with dh by not using dh. 
:-)

--
Jakub Wilk