[Rd] Re: [R] Perl v5.6.0 breaks the configure script

Prof Brian D Ripley ripley@stats.ox.ac.uk
Fri, 7 Apr 2000 07:28:47 +0100 (BST)

On Fri, 7 Apr 2000, Kurt Hornik wrote:

> Anyway, I tried adding a line of code to configure.in which uses $], but
> I failed miserably ... I would either get M4 syntax errors or not get
> the `]'.  Hence, I changed the test to
>     AC_CACHE_CHECK([whether perl version is at least 5],
>       r_cv_prog_perl_v5,
>       [ ${PERL} -e 'require 5' 2>/dev/null
>         if test ${?} -eq 0; then
>           r_cv_prog_perl_v5=yes
>         else
>           r_cv_prog_perl_v5=no
>         fi
>       ])
> which I think should also do the job.

Can anyone test this?  Again, I thought of that, and `require number'
is not in my Perl 4 book.  So although I think it will fail on Perl4,
I am not sure.  In any case, it is safer than what went before.

> Changed in r-devel only.  If anyone thinks we should also do this in
> r-release for 1.0.1, pls let me know && I will make the change (assuming
> that the fix is correct).

Yes, I think it should be changed. We want 1.0.1 to configure under the 
current Perl, which is the only easy one to find.


Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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