Re: shell pwd: non-POSIX variable name ??

[Jules Colding]

Hi Stepan,

On Thu, 2007-03-29 at 16:19 +0200, Stepan Kasal wrote:
> On Thu, Mar 29, 2007 at 02:25:31PM +0200, Jules Colding posted an
> Automake question to the Autoconf list.  (Understandable mistake, of
> course.)

Oops... stupid, stupid mistake. Sorry, should be to old for that :-(


> I suppose the question can be deduced from my answer.  :-)
> 
> > What is the recommended and portable way of doing what I do above to
> > avoid the warnings and to be nice to automake?
> 
> >    OBJS            = $(patsubst %.c,%.o,$(STUB_SRC))
> 
> this can ce written portably as:
> 
> OBJS = $(STUB_SRC:.c=.o)

OK, thanks.


> >    EXTRA_DIST = 
> > $(pkgconfig_DATA:-$(LIBBRUTUS_CURRENT).$(LIBBRUTUS_REVISION).pc=.pc.in)
> 
> It is not portable to use immersed variable expansion.
> But if LIBBRUTUS_CURRENT and LIBBRUTUS_REVISION are AC_SUBSTed
> variables, you can use the @...@ form here:
> 
> EXTRA_DIST = $(pkgconfig_DATA:address@hidden@address@hidden@.pc=.pc.in)

OK.


> >    CWD             = $(shell pwd)
> >    BARE_NAMES      = $(notdir $(IDL_FILES))
> >    LOCAL_IDL_FILES = $(addprefix $(CWD)/,$(BARE_NAMES))
> 
> I do not know any easy way to replace these.  You would have to change
> the logic of the makefile.

I was afraid some of those was in that category. Damn, must think
then...


> > Needless to say that all of this worked without any warnings prior to
> > automake-1.10. 
> 
> To switch these warnings off for a particular Makefile.am, use
> 
> AUTOMAKE_OPTIONS = -Wno-portability
> 
> To switch them off glibally, use
> 
> AM_INIT_AUTOMAKE([-Wno-portability])
> 
> in your configure.ac.

OK, good tip.


> For your information, I found this comment in Automake 1.9.5:
> (and I believe is was there since 1.7 till 1.9.6)
> 
>   # FIXME: 'portability' warnings are currently disabled by default.
>   # Eventually we want to turn them on in GNU and GNITS modes, but
>   # we don't do this yet in Automake 1.7 to help the 1.6/1.7
>   # transition.
>   #
>   # Indeed there would be only two ways to get rid of these new
>   # warnings:
>   #  1. adjusting Makefile.am
>   #     This is not always easy (or wanted).  Consider %-rules or
>   #     $(function args) variables.
>   #  2. using -Wno-portability
>   #     This means there is no way to have the same Makefile.am
>   #     working both with Automake 1.6 and 1.7 (since 1.6 does not
>   #     understand -Wno-portability).
>   #
>   # In Automake 1.8 (or whatever it is called) we can turn these
>   # warnings on, since -Wno-portability will not be an issue for
>   # the 1.7/1.8 transition.
> 
> Have a nice day,

You too and thanks for your help,
  jules