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gerrit-public.fairphone.software / toolchain / llvm-project / e0b4638c6b163dc85607fbf4f4c6c7718dc643aa / . / clang / docs / ReleaseNotes.rst
blob: f161e680f5c75646d94197928b2f78c6aff23a47 [file] [log] [blame]
Hans Wennborg60d06bf2016-07-18 18:05:19 +0000[diff] [blame]1=======================================
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]2Clang 7.0.0 (In-Progress) Release Notes
Hans Wennborg60d06bf2016-07-18 18:05:19 +0000[diff] [blame]3=======================================
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]4
5.. contents::
6 :local:
7 :depth: 2
8
9Written by the `LLVM Team <http://llvm.org/>`_
10
11.. warning::
12
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]13 These are in-progress notes for the upcoming Clang 7 release.
Hans Wennborg189f1f32017-02-09 23:26:34 +0000[diff] [blame]14 Release notes for previous releases can be found on
15 `the Download Page <http://releases.llvm.org/download.html>`_.
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]16
17Introduction
18============
19
20This document contains the release notes for the Clang C/C++/Objective-C
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]21frontend, part of the LLVM Compiler Infrastructure, release 7.0.0. Here we
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]22describe the status of Clang in some detail, including major
23improvements from the previous release and new feature work. For the
24general LLVM release notes, see `the LLVM
25documentation <http://llvm.org/docs/ReleaseNotes.html>`_. All LLVM
26releases may be downloaded from the `LLVM releases web
27site <http://llvm.org/releases/>`_.
28
Hans Wennborgd878ca82017-08-30 18:35:44 +0000[diff] [blame]29For more information about Clang or LLVM, including information about the
30latest release, please see the `Clang Web Site <http://clang.llvm.org>`_ or the
31`LLVM Web Site <http://llvm.org>`_.
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]32
33Note that if you are reading this file from a Subversion checkout or the
34main Clang web page, this document applies to the *next* release, not
35the current one. To see the release notes for a specific release, please
36see the `releases page <http://llvm.org/releases/>`_.
37
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]38What's New in Clang 7.0.0?
Hans Wennborg60d06bf2016-07-18 18:05:19 +0000[diff] [blame]39==========================
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]40
41Some of the major new features and improvements to Clang are listed
42here. Generic improvements to Clang as a whole or to its underlying
43infrastructure are described first, followed by language-specific
44sections with improvements to Clang's support for those languages.
45
46Major New Features
47------------------
48
Hans Wennborg60d06bf2016-07-18 18:05:19 +0000[diff] [blame]49- ...
Rafael Espindola34970692013-12-12 16:07:11 +0000[diff] [blame]50
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]51Improvements to Clang's diagnostics
52^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
53
Roman Lebedevc9977f32018-03-16 18:01:07 +0000[diff] [blame]54- ``-Wc++98-compat-extra-semi`` is a new flag, which was previously inseparable
55 from ``-Wc++98-compat-pedantic``. The latter still controls the new flag.
56
57- ``-Wextra-semi`` now also controls ``-Wc++98-compat-extra-semi``.
58 Please do note that if you pass ``-Wno-c++98-compat-pedantic``, it implies
59 ``-Wno-c++98-compat-extra-semi``, so if you want that diagnostic, you need
60 to explicitly re-enable it (e.g. by appending ``-Wextra-semi``).
Roman Lebedev809df342017-10-26 13:18:14 +0000[diff] [blame]61
Erich Keaneb0c78092017-07-26 18:04:45 +0000[diff] [blame]62Non-comprehensive list of changes in this release
63-------------------------------------------------
64
Richard Smithbb0ad1e2018-04-03 18:28:13 +0000[diff] [blame]65- Clang binary and libraries have been renamed from 7.0 to 7.
66 For example, the ``clang`` binary will be called ``clang-7``
67 instead of ``clang-7.0``.
Sylvestre Ledrua8b717f2018-03-29 10:05:46 +0000[diff] [blame]68
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]69- ...
Alex Lorenzd8ec4312017-12-14 19:22:02 +0000[diff] [blame]70
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]71New Compiler Flags
72------------------
73
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]74- ...
Aaron Ballman2b3bc4c2017-10-21 16:45:08 +0000[diff] [blame]75
Joerg Sonnenbergerc9199682017-07-01 21:36:21 +0000[diff] [blame]76Deprecated Compiler Flags
77-------------------------
78
79The following options are deprecated and ignored. They will be removed in
80future versions of Clang.
81
Hans Wennborgfbb21e02017-07-19 14:14:07 +0000[diff] [blame]82- ...
Joerg Sonnenbergerc9199682017-07-01 21:36:21 +0000[diff] [blame]83
Yuka Takahashiba900ab2018-03-07 11:34:02 +0000[diff] [blame]84Modified Compiler Flags
85-----------------------
86
Sylvestre Ledrue0b46382018-04-04 09:38:22 +0000[diff] [blame^]87- Before Clang 7, we prepended the `#` character to the `--autocomplete`
Eugene Zelenkod02f3e92018-03-08 01:37:39 +0000[diff] [blame]88 argument to enable cc1 flags. For example, when the `-cc1` or `-Xclang` flag
89 is in the :program:`clang` invocation, the shell executed
Sylvestre Ledrue0b46382018-04-04 09:38:22 +0000[diff] [blame^]90 `clang --autocomplete=#-<flag to be completed>`. Clang 7 now requires the
Eugene Zelenkod02f3e92018-03-08 01:37:39 +0000[diff] [blame]91 whole invocation including all flags to be passed to the `--autocomplete` like
92 this: `clang --autocomplete=-cc1,-xc++,-fsyn`.
Yuka Takahashiba900ab2018-03-07 11:34:02 +0000[diff] [blame]93
Tyler Nowickidb2668a2014-06-18 00:51:32 +0000[diff] [blame]94New Pragmas in Clang
95-----------------------
96
Rafael Espindolaaf742502014-08-22 21:59:11 +0000[diff] [blame]97Clang now supports the ...
Mark Heffernanbd26f5e2014-07-21 18:08:34 +0000[diff] [blame]98
Paul Robinsonf9ede1c2016-07-18 17:19:12 +0000[diff] [blame]99
100Attribute Changes in Clang
101--------------------------
102
Erich Keaneace10a22018-01-08 23:36:29 +0000[diff] [blame]103- Clang now supports function multiversioning with attribute 'target' on ELF
104 based x86/x86-64 environments by using indirect functions. This implementation
105 has a few minor limitations over the GCC implementation for the sake of AST
106 sanity, however it is otherwise compatible with existing code using this
107 feature for GCC. Consult the documentation for the target attribute for more
108 information.
Eugene Zelenkod02f3e92018-03-08 01:37:39 +0000[diff] [blame]109
Hans Wennborgfbb21e02017-07-19 14:14:07 +0000[diff] [blame]110- ...
Paul Robinsonf9ede1c2016-07-18 17:19:12 +0000[diff] [blame]111
Hans Wennborg02dc0002014-08-05 00:21:23 +0000[diff] [blame]112Windows Support
113---------------
114
Rafael Espindolaaf742502014-08-22 21:59:11 +0000[diff] [blame]115Clang's support for building native Windows programs ...
Hans Wennborg02dc0002014-08-05 00:21:23 +0000[diff] [blame]116
117
Renato Golinf2fcddb2013-12-13 09:27:34 +0000[diff] [blame]118C Language Changes in Clang
119---------------------------
120
Hans Wennborg60d06bf2016-07-18 18:05:19 +0000[diff] [blame]121- ...
Pirama Arumuga Nainarc85c8532016-06-21 16:09:30 +0000[diff] [blame]122
Renato Golinf2fcddb2013-12-13 09:27:34 +0000[diff] [blame]123...
124
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]125C11 Feature Support
126^^^^^^^^^^^^^^^^^^^
127
128...
129
130C++ Language Changes in Clang
131-----------------------------
132
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]133- ...
Richard Smith8eb53c82016-05-05 18:40:37 +0000[diff] [blame]134
135C++1z Feature Support
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]136^^^^^^^^^^^^^^^^^^^^^
137
138...
139
140Objective-C Language Changes in Clang
141-------------------------------------
142
143...
144
Erik Schnetter489700d2013-11-11 06:36:33 +0000[diff] [blame]145OpenCL C Language Changes in Clang
146----------------------------------
147
Bill Wendling0a794a4b2013-11-20 10:13:37 +0000[diff] [blame]148...
Erik Schnetter489700d2013-11-11 06:36:33 +0000[diff] [blame]149
Alexey Bataev44b67502016-05-31 11:17:08 +0000[diff] [blame]150OpenMP Support in Clang
151----------------------------------
152
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]153- ...
Alexey Bataev44b67502016-05-31 11:17:08 +0000[diff] [blame]154
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]155Internal API Changes
156--------------------
157
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]158These are major API changes that have happened since the 6.0.0 release of
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]159Clang. If upgrading an external codebase that uses Clang as a library,
160this section should help get you past the largest hurdles of upgrading.
161
Vedant Kumar5fb00e42016-07-27 23:01:55 +0000[diff] [blame]162- ...
Richard Smitha0334a92015-05-14 00:22:12 +0000[diff] [blame]163
Aaron Ballmancdc43af2015-09-17 13:47:22 +0000[diff] [blame]164AST Matchers
165------------
Aaron Ballmancdc43af2015-09-17 13:47:22 +0000[diff] [blame]166
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]167- ...
Sylvestre Ledru72e3fa72017-03-14 09:43:55 +0000[diff] [blame]168
169clang-format
170------------
171
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]172- ...
Sylvestre Ledruc9410392017-12-05 09:23:47 +0000[diff] [blame]173
Ted Kremenek3a2291b2013-04-24 07:33:52 +0000[diff] [blame]174libclang
175--------
176
Bill Wendling61f44cc2013-06-04 06:17:46 +0000[diff] [blame]177...
Ted Kremenek3a2291b2013-04-24 07:33:52 +0000[diff] [blame]178
Sylvestre Ledruea49d3a2016-08-06 20:23:54 +0000[diff] [blame]179
Anna Zaksb6219a92013-04-25 23:14:38 +0000[diff] [blame]180Static Analyzer
Ted Kremenek004e8232013-04-26 00:01:34 +0000[diff] [blame]181---------------
Anna Zaksb6219a92013-04-25 23:14:38 +0000[diff] [blame]182
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]183- ...
Roman Lebedev88b56ca2017-11-30 09:18:35 +0000[diff] [blame]184
Bill Wendling0a794a4b2013-11-20 10:13:37 +0000[diff] [blame]185...
Ted Kremenek004e8232013-04-26 00:01:34 +0000[diff] [blame]186
Vedant Kumar840c2c72017-06-13 02:52:31 +0000[diff] [blame]187Undefined Behavior Sanitizer (UBSan)
188------------------------------------
189
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]190* ...
Vedant Kumar840c2c72017-06-13 02:52:31 +0000[diff] [blame]191
Ted Kremenek004e8232013-04-26 00:01:34 +0000[diff] [blame]192Core Analysis Improvements
193==========================
194
Bill Wendling61f44cc2013-06-04 06:17:46 +0000[diff] [blame]195- ...
Ted Kremenek004e8232013-04-26 00:01:34 +0000[diff] [blame]196
197New Issues Found
198================
199
Bill Wendling61f44cc2013-06-04 06:17:46 +0000[diff] [blame]200- ...
Anna Zaksb6219a92013-04-25 23:14:38 +0000[diff] [blame]201
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]202Python Binding Changes
203----------------------
204
205The following methods have been added:
206
207- ...
208
209Significant Known Problems
210==========================
211
212Additional Information
213======================
214
215A wide variety of additional information is available on the `Clang web
216page <http://clang.llvm.org/>`_. The web page contains versions of the
217API documentation which are up-to-date with the Subversion version of
218the source code. You can access versions of these documents specific to
219this release by going into the "``clang/docs/``" directory in the Clang
220tree.
221
222If you have any questions or comments about Clang, please feel free to
223contact us via the `mailing
Tanya Lattner4a08e932015-08-05 03:55:23 +0000[diff] [blame]224list <http://lists.llvm.org/mailman/listinfo/cfe-dev>`_.