Chris Quenelle <Chris.Quenelle at sun.com> wrote:
> Joerg Schilling wrote:
> > 2) POSIX defines a way to forward command line macro=name
> > macro definitions to sub-make programs (make programs
> > called by the current make program) since at least 10
> > years.
> >
> > GNU Make implements this feature since about 15 years and
> > smake implements this feature since 10 years.
> >
> > When whill Sun make implement this feature?
> >
> > Most reasons to patch makefiles from OSS packages will go
> > away in case that command line macro=name definitions
> > are forwarded to sub-makes. You just need to overwrite the
> > values from the top level ake command line.
>
> I'm not familiar with this feature. I'm also not familiar with
> feature of GNU make. I use a mechanism like this
> to achieve the same result in Sun make Makefiles.
>
>
> In my Makefiles I do this:
>
> ENVPARMS=\
> CC=$(CC) \
> LINT=$(LINT) \
> ...
>
> targ:
> $(MAKE) $(ENVPARMS) ...
This is a bad hack as it only works for known macros that always have a
predefined value != "".
The POSIX standard describes how to do it, you don't neet to look into the
unreadable GNU make source ;-)
You append " -- " to MAKEFLAGS from within the make C code.
You append a cleanly correct escaped macro=name list to this
and you need to parse this list with the right precedence in the sub make.
You may check the smake source for more help....
smake -f /dev/null -r -p FOO=123 'BAR=1 2 3 \se' XX=qq |grep MAKEF
MAKEFLAGS = -pr -- FOO=123 BAR=1\ 2\ 3\ \\se XX=qq
J?rg
--
EMail:joerg at schily.isdn.cs.tu-berlin.de (home) J?rg Schilling D-13353 Berlin
js at cs.tu-berlin.de (uni)
joerg.schilling at fokus.fraunhofer.de (work) Blog:
http://schily.blogspot.com/
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