AX_PROG_{PERL, ...} -> (AU) obsoletes both AX_WITH_{PERL, ...} and AX_PROG_{PERL, ...}_VERSION

[Francesco Salvestrini]

Hi all,

The thread about obsoleting the long standing AX_WITH_* wrappers made me 
wander into the repository. Since we have AX_PROG_x_VERSION, no AX_PROG_x and 
we're going to obsolete AX_WITH_x (x = PERL, GUILE, PYTHON and RUBY), the 
following approach (implemented as in the attached patch, only for perl macros 
family at the moment) came to mind:

* AX_PROG_PERL         -> introduced (contains a fixed and enhanced version of 
AX_PROG_PERL_VERSION. It accepts both AX_WITH_PERL and AX_PROG_PERL_VERSION 
usages now)

* AX_PROG_PERL_VERSION -> obsoleted by AX_PROG_PERL

* AX_WITH_PERL         -> obsoleted by AX_PROG_PERL

If you agree: after some more testing on AX_PROG_PERL, all the involved 
families (guile, python and ruby) should be affected the same way (hopefully) 
shortly.

At the end of the obsolescence phase only AX_PROG_PERL should remain, giving a 
(slightly) useful solution and a cleaner naming scheme to the whole archive.

Ciao,
Francesco

-- 
In seeking the unattainable, simplicity only gets in the way.
                -- Epigrams in Programming, ACM SIGPLAN Sept. 1982

0001-Introduced-AX_PROG_PERL-in-order-to-enhance-AX_PROG_.patch
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