On Sat, Oct 27, 2007 at 01:32:54PM +0200, Jan Engelhardt wrote:
>
> On Oct 26 2007 21:05, Markus Elfring wrote:
> >>> Aren't you supposed to use O= as described by "make help"?
> >>
> >> I expect that both ways should work. I find it easier to use the
> >> environment variable
> >> "KBUILD_OUTPUT" because the command line parameter does not need to be
> >> repeated on each
> >> make invocation.
> >
> >A wording correction:
> >I expect that both ways should work. I find it easier to use the environment
> >variable
> >"KBUILD_OUTPUT" because it does not need to be repeated on each make
> >invocation like it
> >must happen with the command line parameter "O=".
>
> So why not just...
> export O=/foo/bar
When introducing the make O=...
I was a bit anal about where the definition of O came from so you will see
that in the top-level Makefile we check if O= is defined at the commandline:
ifdef O
ifeq ("$(origin O)", "command line")
KBUILD_OUTPUT := $(O)
endif
endif
"O" is just too vague to be picked up from the environment.
Sam
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