Thanks, applied to bleadperl as b017ed238008af06e2764e644dee23e72b0847ec. 2009/4/29 Niko Tyni <[email protected]>: > As seen in <http://bugs.debian.org/482139>, using a long floating point > number as $VERSION can make XS_VERSION_BOOTCHECK fail because of a loss > of precision in the stringification: > > RRDs object version 1.2999070803 does not match bootstrap parameter > 1.29990708 at /usr/lib/perl/5.10/DynaLoader.pm line 219. > > The mismatch happens in Perl_upg_version(), which converts a double value > (NV) to a string with nine decimals but leaves a string value intact. > > Using a string as $VERSION works fine: > > -$VERSION=1.299907080300; > +$VERSION="1.299907080300"; > > so recommend this in the VERSIONCHECK entry of perlxs.pod. > --- > pod/perlxs.pod | 6 ++++++ > 1 files changed, 6 insertions(+), 0 deletions(-) > > diff --git a/pod/perlxs.pod b/pod/perlxs.pod > index c367f4c..a6e21a3 100644 > --- a/pod/perlxs.pod > +++ b/pod/perlxs.pod > @@ -1211,6 +1211,12 @@ To disable version checking: > > VERSIONCHECK: DISABLE > > +Note that if the version of the PM module is an NV (a floating point > +number), it will be stringified with a possible loss of precision > +(currently chopping to nine decimal places) so that it may not match > +the version of the XS module anymore. Quoting the $VERSION declaration > +to make it a string is recommended if long version numbers are used. > + > =head2 The PROTOTYPES: Keyword > > The PROTOTYPES: keyword corresponds to B<xsubpp>'s C<-prototypes> and > -- > 1.5.6.5 > >
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