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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/53277] Warning using -Wconversion and -Ox in gcc 4.5, 4.6 and 4.7 but not in previous releases
Date: Wed, 09 May 2012 12:07:00 -0000 [thread overview]
Message-ID: <bug-53277-4-Hf6vlJQJWy@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-53277-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53277
Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |glisse at gcc dot gnu.org
--- Comment #9 from Marc Glisse <glisse at gcc dot gnu.org> 2012-05-09 11:50:09 UTC ---
glibc still has:
# define strspn(s, accept) \
__extension__ \
({ char __a0, __a1, __a2; \
(__builtin_constant_p (accept) && __string2_1bptr_p (accept) \
? ((__builtin_constant_p (s) && __string2_1bptr_p (s)) \
? __builtin_strspn (s, accept) \
: ((__a0 = ((const char *) (accept))[0], __a0 == '\0') \
? ((void) (s), 0) \
: ((__a1 = ((const char *) (accept))[1], __a1 == '\0') \
? __strspn_c1 (s, __a0) \
: ((__a2 = ((const char *) (accept))[2], __a2 == '\0') \
? __strspn_c2 (s, __a0, __a1) \
: (((const char *) (accept))[3] == '\0' \
? __strspn_c3 (s, __a0, __a1, __a2) \
: __builtin_strspn (s, accept)))))) \
: __builtin_strspn (s, accept)); })
The lone 0 in the middle should be explicitly cast to size_t, like it is for
fread_unlocked. Could you report it to glibc please?
gcc could avoid this warning when converting a constant, I am pretty sure the
same issue (possibly with another macro) already led to such a conversation...
next prev parent reply other threads:[~2012-05-09 11:50 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-08 9:00 [Bug c/53277] New: " jgpallero at gmail dot com
2012-05-08 16:06 ` [Bug c/53277] " pinskia at gcc dot gnu.org
2012-05-09 10:51 ` jgpallero at gmail dot com
2012-05-09 10:52 ` jgpallero at gmail dot com
2012-05-09 10:52 ` jgpallero at gmail dot com
2012-05-09 10:53 ` jgpallero at gmail dot com
2012-05-09 10:54 ` jgpallero at gmail dot com
2012-05-09 10:56 ` jgpallero at gmail dot com
2012-05-09 11:06 ` jgpallero at gmail dot com
2012-05-09 12:07 ` glisse at gcc dot gnu.org [this message]
2012-05-09 12:54 ` manu at gcc dot gnu.org
2012-05-09 13:11 ` jgpallero at gmail dot com
2012-05-09 13:12 ` glisse at gcc dot gnu.org
2012-05-09 13:46 ` manu at gcc dot gnu.org
2012-05-09 15:17 ` jgpallero at gmail dot com
2012-05-09 15:56 ` [Bug c/53277] -Wconversion cannot handle compound expresions manu at gcc dot gnu.org
2021-07-20 17:16 ` [Bug c/53277] -Wconversion cannot handle compound expressions me at xenu dot pl
2021-07-20 17:33 ` me at xenu dot pl
2021-07-20 17:41 ` redi at gcc dot gnu.org
2021-07-20 17:42 ` pinskia at gcc dot gnu.org
2023-06-15 0:34 ` pinskia at gcc dot gnu.org
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