Bug#740397: busybox: please add support for parallel building

[Ian Campbell <ijc@hellion.org.uk>]

On Sat, 2014-03-01 at 03:17 +0100, Cyril Brulebois wrote:
> -       $(MAKE) -C ${DIR} install docs/busybox.1 \
> +       $(MAKE) -j$(NUMJOBS) -C ${DIR} install docs/busybox.1 \

If parallel build is not set then won't this end up passing a bare "-j"
which will run an unlimited number of jobs...

https://www.debian.org/doc/debian-policy/ch-source.html suggests:

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

to avoid this.

Ian.