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gerrit-public.fairphone.software / toolchain / llvm-project / c9977f38770ff3b24795fe2e78cd52a29284b790 / . / clang / docs / ReleaseNotes.rst
blob: 11de272d2c854a78b6acd79787993ca1d0e4260a [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
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]65- ...
Alex Lorenzd8ec4312017-12-14 19:22:02 +0000[diff] [blame]66
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]67New Compiler Flags
68------------------
69
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]70- ...
Aaron Ballman2b3bc4c2017-10-21 16:45:08 +0000[diff] [blame]71
Joerg Sonnenbergerc9199682017-07-01 21:36:21 +0000[diff] [blame]72Deprecated Compiler Flags
73-------------------------
74
75The following options are deprecated and ignored. They will be removed in
76future versions of Clang.
77
Hans Wennborgfbb21e02017-07-19 14:14:07 +0000[diff] [blame]78- ...
Joerg Sonnenbergerc9199682017-07-01 21:36:21 +0000[diff] [blame]79
Yuka Takahashiba900ab2018-03-07 11:34:02 +0000[diff] [blame]80Modified Compiler Flags
81-----------------------
82
Eugene Zelenkod02f3e92018-03-08 01:37:39 +0000[diff] [blame]83- Before Clang 7.0, we prepended the `#` character to the `--autocomplete`
84 argument to enable cc1 flags. For example, when the `-cc1` or `-Xclang` flag
85 is in the :program:`clang` invocation, the shell executed
86 `clang --autocomplete=#-<flag to be completed>`. Clang 7.0 now requires the
87 whole invocation including all flags to be passed to the `--autocomplete` like
88 this: `clang --autocomplete=-cc1,-xc++,-fsyn`.
Yuka Takahashiba900ab2018-03-07 11:34:02 +0000[diff] [blame]89
Tyler Nowickidb2668a2014-06-18 00:51:32 +0000[diff] [blame]90New Pragmas in Clang
91-----------------------
92
Rafael Espindolaaf742502014-08-22 21:59:11 +0000[diff] [blame]93Clang now supports the ...
Mark Heffernanbd26f5e2014-07-21 18:08:34 +0000[diff] [blame]94
Paul Robinsonf9ede1c2016-07-18 17:19:12 +0000[diff] [blame]95
96Attribute Changes in Clang
97--------------------------
98
Erich Keaneace10a22018-01-08 23:36:29 +0000[diff] [blame]99- Clang now supports function multiversioning with attribute 'target' on ELF
100 based x86/x86-64 environments by using indirect functions. This implementation
101 has a few minor limitations over the GCC implementation for the sake of AST
102 sanity, however it is otherwise compatible with existing code using this
103 feature for GCC. Consult the documentation for the target attribute for more
104 information.
Eugene Zelenkod02f3e92018-03-08 01:37:39 +0000[diff] [blame]105
Hans Wennborgfbb21e02017-07-19 14:14:07 +0000[diff] [blame]106- ...
Paul Robinsonf9ede1c2016-07-18 17:19:12 +0000[diff] [blame]107
Hans Wennborg02dc0002014-08-05 00:21:23 +0000[diff] [blame]108Windows Support
109---------------
110
Rafael Espindolaaf742502014-08-22 21:59:11 +0000[diff] [blame]111Clang's support for building native Windows programs ...
Hans Wennborg02dc0002014-08-05 00:21:23 +0000[diff] [blame]112
113
Renato Golinf2fcddb2013-12-13 09:27:34 +0000[diff] [blame]114C Language Changes in Clang
115---------------------------
116
Hans Wennborg60d06bf2016-07-18 18:05:19 +0000[diff] [blame]117- ...
Pirama Arumuga Nainarc85c8532016-06-21 16:09:30 +0000[diff] [blame]118
Renato Golinf2fcddb2013-12-13 09:27:34 +0000[diff] [blame]119...
120
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]121C11 Feature Support
122^^^^^^^^^^^^^^^^^^^
123
124...
125
126C++ Language Changes in Clang
127-----------------------------
128
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]129- ...
Richard Smith8eb53c82016-05-05 18:40:37 +0000[diff] [blame]130
131C++1z Feature Support
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]132^^^^^^^^^^^^^^^^^^^^^
133
134...
135
136Objective-C Language Changes in Clang
137-------------------------------------
138
139...
140
Erik Schnetter489700d2013-11-11 06:36:33 +0000[diff] [blame]141OpenCL C Language Changes in Clang
142----------------------------------
143
Bill Wendling0a794a4b2013-11-20 10:13:37 +0000[diff] [blame]144...
Erik Schnetter489700d2013-11-11 06:36:33 +0000[diff] [blame]145
Alexey Bataev44b67502016-05-31 11:17:08 +0000[diff] [blame]146OpenMP Support in Clang
147----------------------------------
148
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]149- ...
Alexey Bataev44b67502016-05-31 11:17:08 +0000[diff] [blame]150
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]151Internal API Changes
152--------------------
153
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]154These are major API changes that have happened since the 6.0.0 release of
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]155Clang. If upgrading an external codebase that uses Clang as a library,
156this section should help get you past the largest hurdles of upgrading.
157
Vedant Kumar5fb00e42016-07-27 23:01:55 +0000[diff] [blame]158- ...
Richard Smitha0334a92015-05-14 00:22:12 +0000[diff] [blame]159
Aaron Ballmancdc43af2015-09-17 13:47:22 +0000[diff] [blame]160AST Matchers
161------------
Aaron Ballmancdc43af2015-09-17 13:47:22 +0000[diff] [blame]162
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]163- ...
Sylvestre Ledru72e3fa72017-03-14 09:43:55 +0000[diff] [blame]164
165clang-format
166------------
167
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]168- ...
Sylvestre Ledruc9410392017-12-05 09:23:47 +0000[diff] [blame]169
Ted Kremenek3a2291b2013-04-24 07:33:52 +0000[diff] [blame]170libclang
171--------
172
Bill Wendling61f44cc2013-06-04 06:17:46 +0000[diff] [blame]173...
Ted Kremenek3a2291b2013-04-24 07:33:52 +0000[diff] [blame]174
Sylvestre Ledruea49d3a2016-08-06 20:23:54 +0000[diff] [blame]175
Anna Zaksb6219a92013-04-25 23:14:38 +0000[diff] [blame]176Static Analyzer
Ted Kremenek004e8232013-04-26 00:01:34 +0000[diff] [blame]177---------------
Anna Zaksb6219a92013-04-25 23:14:38 +0000[diff] [blame]178
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]179- ...
Roman Lebedev88b56ca2017-11-30 09:18:35 +0000[diff] [blame]180
Bill Wendling0a794a4b2013-11-20 10:13:37 +0000[diff] [blame]181...
Ted Kremenek004e8232013-04-26 00:01:34 +0000[diff] [blame]182
Vedant Kumar840c2c72017-06-13 02:52:31 +0000[diff] [blame]183Undefined Behavior Sanitizer (UBSan)
184------------------------------------
185
Hans Wennborg7b852ea2018-01-03 15:49:39 +0000[diff] [blame]186* ...
Vedant Kumar840c2c72017-06-13 02:52:31 +0000[diff] [blame]187
Ted Kremenek004e8232013-04-26 00:01:34 +0000[diff] [blame]188Core Analysis Improvements
189==========================
190
Bill Wendling61f44cc2013-06-04 06:17:46 +0000[diff] [blame]191- ...
Ted Kremenek004e8232013-04-26 00:01:34 +0000[diff] [blame]192
193New Issues Found
194================
195
Bill Wendling61f44cc2013-06-04 06:17:46 +0000[diff] [blame]196- ...
Anna Zaksb6219a92013-04-25 23:14:38 +0000[diff] [blame]197
Sean Silvafe251442012-12-23 01:19:35 +0000[diff] [blame]198Python Binding Changes
199----------------------
200
201The following methods have been added:
202
203- ...
204
205Significant Known Problems
206==========================
207
208Additional Information
209======================
210
211A wide variety of additional information is available on the `Clang web
212page <http://clang.llvm.org/>`_. The web page contains versions of the
213API documentation which are up-to-date with the Subversion version of
214the source code. You can access versions of these documents specific to
215this release by going into the "``clang/docs/``" directory in the Clang
216tree.
217
218If you have any questions or comments about Clang, please feel free to
219contact us via the `mailing
Tanya Lattner4a08e932015-08-05 03:55:23 +0000[diff] [blame]220list <http://lists.llvm.org/mailman/listinfo/cfe-dev>`_.