+version_patchlevel_string (patchlevel.U):
+ This is a string combining version, subversion and
+ perl_patchlevel (if perl_patchlevel is non-zero).
+ It is typically something like
+ 'version 7 subversion 1' or
+ 'version 7 subversion 1 patchlevel 11224'
+ It is computed here to avoid duplication of code in myconfig.SH
+ and lib/Config.pm.
+
+versiononly (versiononly.U):
+ If set, this symbol indicates that only the version-specific
+ components of a perl installation should be installed.
+ This may be useful for making a test installation of a new
+ version without disturbing the existing installation.
+ Setting versiononly is equivalent to setting installperl's -v option.
+ In particular, the non-versioned scripts and programs such as
+ a2p, c2ph, h2xs, pod2*, and perldoc are not installed
+ (see INSTALL for a more complete list). Nor are the man
+ pages installed.
+ Usually, this is undef.
+