=head3 quadmath
-Another option for long doubles is that gcc 4.6 and later have library
+One option for long doubles is that gcc 4.6 and later have a library
called quadmath, which implements the IEEE 754 quadruple precision
(128-bit, 113 bits of mantissa) floating point numbers. The library
works at least on x86 and ia64 platforms. It may be part of your gcc
installation, or you may need to install it separately.
-With "Configure -Dusequadmath" you can enable its use, but note the
-compiler dependency, you may need to also add "-Dcc=..." This option
-also turns on -Duselongdouble. At C level the type is called C<__float128>,
-(note, not "long double") but Perl source knows it as NV.
+With "Configure -Dusequadmath" you can try enabling its use, but note
+the compiler dependency, you may need to also add "-Dcc=...".
+This option also turns on -Duselongdouble. At C level the type is called
+C<__float128> (note, not "long double"), but Perl source knows it as NV.
=head3 Algorithmic Complexity Attacks on Hashes
=item Directories for the perl distribution
-By default, Configure will use the following directories for 5.21.4.
+By default, Configure will use the following directories for 5.21.5.
$version is the full perl version number, including subversion, e.g.
5.12.3, and $archname is a string like sun4-sunos,
determined by Configure. The full definitions of all Configure
=head1 Coexistence with earlier versions of perl 5
-Perl 5.21.4 is not binary compatible with earlier versions of Perl.
+Perl 5.21.5 is not binary compatible with earlier versions of Perl.
In other words, you will have to recompile your XS modules.
In general, you can usually safely upgrade from one version of Perl (e.g.
libraries after 5.6.0, but not for executables. TODO?) One convenient
way to do this is by using a separate prefix for each version, such as
- sh Configure -Dprefix=/opt/perl5.21.4
+ sh Configure -Dprefix=/opt/perl5.21.5
-and adding /opt/perl5.21.4/bin to the shell PATH variable. Such users
+and adding /opt/perl5.21.5/bin to the shell PATH variable. Such users
may also wish to add a symbolic link /usr/local/bin/perl so that
scripts can still start with #!/usr/local/bin/perl.
=head2 Upgrading from 5.21.3 or earlier
-B<Perl 5.21.4 may not be binary compatible with Perl 5.21.3 or
+B<Perl 5.21.5 may not be binary compatible with Perl 5.21.4 or
earlier Perl releases.> Perl modules having binary parts
(meaning that a C compiler is used) will have to be recompiled to be
-used with 5.21.4. If you find you do need to rebuild an extension with
-5.21.4, you may safely do so without disturbing the older
+used with 5.21.5. If you find you do need to rebuild an extension with
+5.21.5, you may safely do so without disturbing the older
installations. (See L<"Coexistence with earlier versions of perl 5">
above.)
print("$f\n");
}
-in Linux with perl-5.21.4 is as follows (under $Config{prefix}):
+in Linux with perl-5.21.5 is as follows (under $Config{prefix}):
./bin/perl
- ./lib/perl5/5.21.4/strict.pm
- ./lib/perl5/5.21.4/warnings.pm
- ./lib/perl5/5.21.4/i686-linux/File/Glob.pm
- ./lib/perl5/5.21.4/feature.pm
- ./lib/perl5/5.21.4/XSLoader.pm
- ./lib/perl5/5.21.4/i686-linux/auto/File/Glob/Glob.so
+ ./lib/perl5/5.21.5/strict.pm
+ ./lib/perl5/5.21.5/warnings.pm
+ ./lib/perl5/5.21.5/i686-linux/File/Glob.pm
+ ./lib/perl5/5.21.5/feature.pm
+ ./lib/perl5/5.21.5/XSLoader.pm
+ ./lib/perl5/5.21.5/i686-linux/auto/File/Glob/Glob.so
Secondly, for perl-5.10.1, the Debian perl-base package contains 591 files,
(of which 510 are for lib/unicore) totaling about 3.5MB in its i386 version.