Providing dprintf

[Rob Landley]

On Tuesday 25 October 2005 02:30, Bernhard Fischer wrote:
> >Perhaps the makefile run sed against the thing and...  No.  Go down that
> > path and we're reimplementing autoconf (badly) ourselves.
>
> hm?
> DEP_INCLUDES += include/automagic.h
> nullify_automagic:
>  -$(RM_F) include/automagic.h
>
> include/automagic.h: nullify_automagic has_dprint
> has_whatever_additional_func
>
> has_dprint:
>  d=/tmp/$$busybox_dprintf.c ; ret=$(shell echo -e "#inc\ndprint(simple);" >
> $d && $(CC) -c $$d ; echo $?) ; if [ "x$ret" = "x0" ] ; then HAVE_DPRINT=1
> ; fi [ $$HAVE_DPRINT -eq 1 ] && echo "#define HAVE_DPRINT 1" >>
> include/automagic.h || echo "#undef HAVE_DPRINT" >> include/automagic.h
>
> and include it somewhere where the applets see the magic later on.
> untested, but should allow us to get away without switching to autotools
> just for dprint..
>
> hth,
> Bernhard

If somebody else wants to handle this, I'm happy to stay far, far away from 
the implementation details. :)

Don't use /tmp, by the way.  (We have a working directory.)

And we should definitely start to have a plaform.h to consolidate some of this 
mess if we go down that path...

Rob