C<IV_MAX> is typically 2**31 -1 on 32-bit platforms, and 2**63-1 on
64-bit ones.
+=head2 Doing bitwise operations on strings containing code points above
+0xFF is deprecated
+
+The string bitwise operators treat their operands as strings of bytes,
+and values beyond 0xFF are nonsensical in this context. To operate on
+encoded bytes, first encode the strings. To operate on code points'
+numeric values, use C<split> and C<map ord>. In the future, this
+warning will be replaced by an exception.
+
=head1 Performance Enhancements
XXX Changes which enhance performance without changing behaviour go here.
=item *
-L<XXX> has been upgraded from version A.xx to B.yy.
+L<Data::Dumper> has been upgraded from version 2.158 to 2.159.
+
+This adds a "Trailingcomma" option, which when enabled adds a trailing comma
+after the last element of dumped arrays and hashes that would otherwise be
+followed immediately by a line break. [perl #126813]
+
+=item *
+
+L<DynaLoader> has been upgraded from version 1.36 to 1.37.
+
+Fixed an else nesting issue in dynamic loading support for OS/390 (and
+similar systems) that was introduced in 1.36.
+
+=item *
+
+L<utf8> has been upgraded from 1.17 to 1.18.
+
+Partly reverted a micro-optimization to F<lib/utf_heavy.pl> that
+caused self-recursion when it was loaded with C<${^ENCODING}> set.
+[perl #126593]
+
+=item *
+
+The modules L<sigtrap>, L<DB>, and the perl debugger could have under
+rare circumstances, without you expecting it, output containing raw
+control characters. This has been fixed.
=back
=item *
-XXX
+F<make_ext.pl> is no longer inappropriately silent. This was caused
+by an operator precedence error introduced in 5.23.4.
=back
[ Within the sections, list each platform as a =item entry with specific
changes as paragraphs below it. ]
+=over 4
+
+=item All Solaris now builds shared libperl
+
+Solaris and variants like OpenIndiana now always build with the shared
+Perl library (Configure -Duseshrplib). This was required for the
+OpenIndiana builds, but this has also been the setting for Oracle/Sun
+Perl builds for several years.
+
+=back
+
=head2 New Platforms
XXX List any platforms that this version of perl compiles on, that previous
=over 4
-=item XXX-some-platform
+=item OpenIndiana
-XXX
+OpenIndiana (continuation of OpenSolaris) builds were not working due
+to problems with the Perl shared library. This should be working now.
+L<[perl #126958]|https://rt.perl.org/Ticket/Display.html?id=126958>
=back
do have one, submit a ticket at L<mailto:perlbug@perl.org>, and we will
write a conversion script for you.
+=item OS X/Darwin
+
+Builds with both -DDEBUGGING and threading enabled would fail with a
+"panic: free from wrong pool" error when built or tested from Terminal
+on OS X. This was caused by perl's internal management of the
+environment conflicting with an atfork handler using the libc
+setenv() function to update the environment.
+
+Perl now uses setenv()/unsetenv() to update the environment on OS X.
+[perl #126240]
+
+=item ppc64el floating point
+
+The floating point format of ppc64el (Debian naming for little-endian
+PowerPC) is now detected correctly.
+
=back
=head1 Internal Changes
=item *
-XXX
+Perl core code and the threads extension have been annotated so that
+if Perl is configured to use threads, during compile-time clang (3.6
+or later) will warn about suspicious uses of mutexes.
+See L<http://clang.llvm.org/docs/ThreadSafetyAnalysis.html> for more
+information.
+
+=item *
+
+The signbit() emulation has been enhanced. This will help older
+and/or more exotic platforms or configurations.
=back
there. However, it was counting back bytes rather than characters, which
could lead to panics on utf8 strings.
+=item *
+
+In some cases operators that return integers would return negative
+integers as large positive integers. [perl #126635]
+
+=item *
+
+The pipe() operator would assert for DEBUGGING builds instead of
+producing the correct error message. The condition asserted on is
+detected and reported on correctly without the assertions, so the
+assertions were removed. [perl #126480]
+
+=item *
+
+In some cases, failing to parse a here-doc would attempt to use freed
+memory. This was caused by a pointer not being restored correctly.
+[perl #126443]
+
+=item *
+
+C<< @x = sort { *a = 0; $a <=> $b } 0 .. 1 >> no longer frees the GP
+for *a before restoring its SV slot. [perl #124097]
+
+=item *
+
+Multiple problems with the new hexadecimal floating point printf
+format C<%a> were fixed:
+L<[perl #126582]|https://rt.perl.org/Ticket/Display.html?id=126582>,
+L<[perl #126586]|https://rt.perl.org/Ticket/Display.html?id=126586>,
+L<[perl #126822]|https://rt.perl.org/Ticket/Display.html?id=126822>
+
=back
=head1 Known Problems
https://perl5.git.perl.org / perl5.git / blobdiff