Change perl -v version format

New format:

  This is perl 5, version 11, subversion 1 (v5.11.1) ...

The rationale for this change is that the Perl 5 interpreter will never
increment PERL_REVISION from 5 to 6, so we want people to start focusing
on the PERL_VERSION number as most significant and PERL_SUBVERSION as
equivalent to a "release number".  In other words, "perl 5" is a
language, this is the 11th version of it, and the second release of that
version (counting from zero).  Among other things, this makes the
output of -v and -V more consistent.

The old v-string style is included for familiarity and usage in code.
For builds from git, it will include the same extended format as it
did before, e.g. "(v5.11.1-176-gaf24cc9*)"

1 files changed, 5 insertions, 3 deletions

diff --git a/perl.c b/perl.c
index 3ffd3fc9e9..a9abdb46fe 100644
--- a/perl.c
+++ b/perl.c
@@ -3222,9 +3222,11 @@ Perl_moreswitches(pTHX_ const char *s)
 	    }
  #endif
 	    PerlIO_printf(PerlIO_stdout(),
-		"\nThis is perl, %"SVf
-		" built for " ARCHNAME,
-		level);
+		"\nThis is perl "	STRINGIFY(PERL_REVISION)
+		", version "		STRINGIFY(PERL_VERSION)
+		", subversion "		STRINGIFY(PERL_SUBVERSION)
+		" (%"SVf") built for "	ARCHNAME, level
+		);
 	    SvREFCNT_dec(level);
 	}
 #else /* DGUX */