Bug#209008: parallel building: DEB_BUILD_OPTIONS or DEB_BUILD_OPTIONS_PARALLEL

[Matthias Klose <doko@cs.tu-berlin.de>]

Lucas Nussbaum writes:
> On 27/07/07 at 23:35 +0200, Wouter Verhelst wrote:
> > On Fri, Jul 27, 2007 at 04:56:14PM +0200, Matthias Klose wrote:
> > >  - What to do if that option is not present? Should a package be
> > >    allowed to build in parallel anyway, determing the number of
> > >    processes itself, or should it be a sequential build?
> > 
> > I think it should behave as is currently required then; that is to say,
> > make it a sequential build.

Updated the Makefile example to work with whitespace and comma
separated values, without using the shell:

ifneq (,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
  COMMA = ,
  NUMJOBS := $(patsubst parallel=%,%,$(filter parallel=%,$(subst $(COMMA), ,$(DEB_BUILD_OPTIONS))))
  MAKEFLAGS = -j $(NUMJOBS)
endif