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Title: VTRACE macro in _sre.c should use do {} while (0)
Type: Stage: resolved
Components: Build, Extension Modules Versions: Python 3.2, Python 3.3, Python 2.7
process
Status: closed Resolution: fixed
Dependencies: Superseder:
Assigned To: Nosy List: eric.araujo, joshtriplett, petri.lehtinen, python-dev
Priority: normal Keywords: needs review, patch

Created on 2011年07月21日 20:38 by joshtriplett, last changed 2022年04月11日 14:57 by admin. This issue is now closed.

Files
File name Uploaded Description Edit
fix_empty_macro.patch petri.lehtinen, 2011年07月22日 18:04
Messages (6)
msg140827 - (view) Author: Josh Triplett (joshtriplett) Date: 2011年07月21日 20:38
In _sre.c, the VTRACE macro normally gets defined to nothing. It later gets used as the body of control structures such as "else" without braces, which causes many compilers to warn (to catch stray semicolons like "else;"). This makes it difficult to compile Python as part of a project which uses -Werror, such as GRUB. Please consider defining VTRACE as do {} while(0) instead, as the standard convention for an empty function-like macro with no return value.
msg140899 - (view) Author: Petri Lehtinen (petri.lehtinen) * (Python committer) Date: 2011年07月22日 18:04
Attached a patch against 2.7 that adds the suggested fix.
msg140960 - (view) Author: Petri Lehtinen (petri.lehtinen) * (Python committer) Date: 2011年07月23日 10:17
Should the component really be extension modules? I don't believe _sre.c is a part of the API, and the problem is embedding Python as a whole.
msg141786 - (view) Author: Éric Araujo (eric.araujo) * (Python committer) Date: 2011年08月08日 15:20
_sre is a module written in C, not Python; we call that an extension module. The Library component is used for Python modules, which are found in the Lib directory in a checkout of CPython. See #12711.
msg141794 - (view) Author: Petri Lehtinen (petri.lehtinen) * (Python committer) Date: 2011年08月08日 17:40
Éric Araujo wrote:
> _sre is a module written in C, not Python; we call that an extension
> module. The Library component is used for Python modules, which are
> found in the Lib directory in a checkout of CPython. See #12711.
Ok, I wasn't aware of this. Thanks.
msg145930 - (view) Author: Roundup Robot (python-dev) (Python triager) Date: 2011年10月19日 18:17
New changeset f35514dfadf8 by Senthil Kumaran in branch '2.7':
Fix Issue 12604 - Use a proper no-op macro expansion for VTRACE macro in _sre.c
http://hg.python.org/cpython/rev/f35514dfadf8
New changeset ab028084f704 by Senthil Kumaran in branch '3.2':
3.2 - Fix Issue 12604 - Use a proper no-op macro expansion for VTRACE macro in _sre.c
http://hg.python.org/cpython/rev/ab028084f704
New changeset 847afc310190 by Senthil Kumaran in branch 'default':
default - Fix closes Issue 12604 - Use a proper no-op macro expansion for VTRACE macro in _sre.c
http://hg.python.org/cpython/rev/847afc310190 
History
Date User Action Args
2022年04月11日 14:57:19adminsetgithub: 56813
2011年10月19日 18:17:19python-devsetstatus: open -> closed

nosy: + python-dev
messages: + msg145930

resolution: fixed
stage: commit review -> resolved
2011年08月08日 17:40:39petri.lehtinensetmessages: + msg141794
2011年08月08日 15:22:01eric.araujosetstage: patch review -> commit review
2011年08月08日 15:20:58eric.araujosetnosy: + eric.araujo
messages: + msg141786
2011年07月23日 10:17:23petri.lehtinensetmessages: + msg140960
2011年07月22日 21:41:07eric.araujosetcomponents: + Extension Modules, - Library (Lib)
versions: + Python 3.2, Python 3.3
2011年07月22日 18:05:09petri.lehtinensetkeywords: + needs review
components: + Build, Library (Lib)
stage: patch review
2011年07月22日 18:04:15petri.lehtinensetfiles: + fix_empty_macro.patch

nosy: + petri.lehtinen
messages: + msg140899

keywords: + patch
2011年07月21日 20:38:13joshtriplettcreate

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