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-<?xml version="1.0" encoding="latin1" ?>
-<!DOCTYPE chapter SYSTEM "chapter.dtd">
-
-<chapter>
- <header>
- <copyright>
- <year>2006</year><year>2010</year>
- <holder>Ericsson AB. All Rights Reserved.</holder>
- </copyright>
- <legalnotice>
- The contents of this file are subject to the Erlang Public License,
- Version 1.1, (the "License"); you may not use this file except in
- compliance with the License. You should have received a copy of the
- Erlang Public License along with this software. If not, it can be
- retrieved online at http://www.erlang.org/.
-
- Software distributed under the License is distributed on an "AS IS"
- basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
- the License for the specific language governing rights and limitations
- under the License.
-
- </legalnotice>
-
- <title>Potential Incompatibilities</title>
- <prepared></prepared>
- <docno></docno>
- <date></date>
- <rev></rev>
- <file>incompatible.xml</file>
- </header>
- <p>This document contains a list of potential incompatibilities
- between Erlang 5.8/OTP R14A and Erl 5.7.5/OTP R13B04,
- and is an extract from the release notes for the respective applications.</p>
-
- <section>
- <title>Tools</title>
- <list type="bulleted">
- <item>
- <p>
- Xref has been updated to use the re module instead of the
- deprecated regexp module.</p>
- <p>*** INCOMPATIBILITY with R12B ***</p>
- <p>
- Own Id: OTP-8472</p>
- </item>
- <item>
- <p>eprof has been reimplemented with support in the Erlang
- virtual machine and is now both faster (i.e. slows down the
- code being measured less) and scales much better. In
- measurements we saw speed-ups compared to the old eprof
- ranging from 6 times (for sequential code that only uses one
- scheduler/core) up to 84 times (for parallel code that uses 8
- cores).</p>
-
- <p>Note: The API for the eprof has been cleaned up and extended.
- See the documentation.</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-8706</p>
- </item>
- </list>
- </section>
-
- <section>
- <title>Odbc</title>
- <list type="bulleted">
- <item>
- <p>
- Now supports SQL_TYPE_TIMESTAMP on the format {{YY, MM, DD},
- {HH, MM, SS}}. Thanks to Juhani Ränkimies.
- </p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-8511</p>
- </item>
- </list>
- </section>
-
- <section>
- <title>Ssh</title>
- <list type="bulleted">
- <item>
- <p>
- The configuration parameter ip_v6_disabled is now available,
- which makes it possible for the user to alter the IP version
- SSH shall use.</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-8535</p>
- </item>
- <item>
- <p>
- Removed deprecated modules (ssh_ssh, ssh_sshd and ssh_cm) and
- functions (ssh_sftp:connect and ssh_sftp:stop).</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-8596</p>
- </item>
- <item>
- <p>
- Aligned error message with used version (SSH_FX_FAILURE vs
- SSH_FX_NOT_A_DIRECTORY, the latter introduced in version 6).</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-8644</p>
- </item>
- </list>
- </section>
-
- <section>
- <title>ERTS</title>
- <list>
- <item>
- <p>Some incompatible changes made to the NIF API. For more
- information see the warning text in erl_nif(3).</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-8555</p>
- </item>
- </list>
- </section>
-
- <section>
- <title>STDLIB</title>
- <list type="bulleted">
- <item>
- <p>When defining macros the closing right parenthesis before the
- dot is now mandatory.</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-8562</p>
- </item>
- </list>
- </section>
-
- <section>
- <title>Compiler and STDLIB</title>
- <list type="bulleted">
- <item>
- <p>
- Local and imported functions now override the auto-imported
- BIFs when the names clash. The pre R14 behaviour was that
- auto-imported BIFs would override local functions. To avoid
- that old programs change behaviour, the following will
- generate an error:</p>
-
- <list type="bulleted">
- <item>Doing a call without explicit module name to a local function
- having a name clashing with the name of an auto-imported BIF
- that was present (and auto-imported) before OTP R14A</item>
-
- <item>Explicitly importing a function having a name clashing with
- the name of an autoimported BIF that was present (and
- autoimported) before OTP R14A</item>
-
- <item>Using any form of the old compiler directive nowarn_bif_clash</item>
- </list>
-
- <p>If the BIF was added or auto-imported in OTP R14A or later,
- overriding it with an import or a local function will only
- result in a warning.</p>
-
- <p>To resolve clashes, you can either use the explicit module
- name erlang to call the BIF, or you can remove the
- auto-import of that specific BIF by using the new compiler
- directive -compile({no_auto_import,[F/A]})., which makes all
- calls to the local or imported function without explicit
- module name pass without warnings or errors.</p>
-
- <p>The change makes it possible to add auto-imported BIFs
- without breaking or silently changing old code in the future.
- However some current code ingeniously utilizing the old
- behaviour or the nowarn_bif_clash compiler directive, might
- need changing to be accepted by the compiler.</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-8579</p>
- </item>
- <item>
- <p>
- The recently added BIFs erlang:min/2, erlang:max/2 and
- erlang:port_command/3 are now auto-imported (as they were
- originally intended to be). Due to the recent compiler change
- (OTP-8579), the only impact on old code defining it's own
- min/2, max/2 or port_command/3 functions will be a warning,
- the local functions will still be used. The warning can be
- removed by using
- -compile({no_auto_import,[min/2,max/2,port_command/3]}). in
- the source file.</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-8669</p>
- </item>
- <item>
- <p>
- Now, binary_to_term/2 is auto-imported. This will cause a
- compile warning if and only if a module has got a local
- function with that name.</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-8671</p>
- </item>
- </list>
- </section>
-
- <section>
- <title>Erl_interface</title>
- <list type="bulleted">
- <item>
- <p>Compact IEEE 754 double encoding in external binary format
- for ei</p>
-
- <p>Implement the compact IEEE 754 double encoding in external
- binary format for ei. Encoding for ei now always produces the
- NEW_FLOAT_EXT format. Decoding and term printing handle both
- the old ERL_FLOAT_EXT encoding and the new NEW_FLOAT_EXT
- encoding.</p>
-
- <p>Legacy erl_interface code also handles the new encoding, but
- still produces the ERL_FLOAT_EXT encoding by default.</p>
-
- <p>Also enable the DFLAG_NEW_FLOATS distribution flag.</p>
-
- <p>ei_get_type() will return ERL_FLOAT_EXT regardless if the
- external format is encoded with ERL_FLOAT_EXT or
- NEW_FLOAT_EXT for doubles.</p>
-
- <p>Reduce the number of copies of the code for encoding and
- decoding doubles throughout ei and erl_interface by instead
- calling the ei encoding and decoding functions wherever
- possible.</p>
-
- <p>Restore commented-out float tests in ei_decode_SUITE and
- ei_encode_SUITE in lib/erl_interface/test. Modify them to
- make them match the style of other tests in the same suites.</p>
-
- <p>These changes are based on an ei float patch from Serge
- Aleynikov originally submitted against R12B-2 in July 2008
- and reworked by Steve Vinoski May 2010.</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-8684</p>
- </item>
- </list>
- </section>
- <section>
- <title>Debugger and STDLIB</title>
- <list type="bulleted">
- <item>
- <p> The predefined builtin type tid() has been removed. Instead,
- ets:tid() should be used.</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-8687</p>
- </item>
- </list>
- </section>
-</chapter>
-