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* [Bug c/40485] New: definitions of __builtin_abs() and abs() function in one module
@ 2009-06-18 9:20 ivan dot glushkov at gmail dot com
2009-06-18 9:36 ` [Bug c/40485] definitions of __builtin_abs() and abs() function in one module not diagnosed rguenth at gcc dot gnu dot org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: ivan dot glushkov at gmail dot com @ 2009-06-18 9:20 UTC (permalink / raw)
To: gcc-bugs
Hello.
gcc always replaces the name of the defined "__builtin_abs()" with "abs()". And
it might cause the error if we also wants to define "abs()" function:
$ cat t.c
int abs(int a) {return 0;}
int __builtin_abs(int a) {return 0;}
int main(void)
{
return (abs(-3) + __builtin_abs(-3));
}
$ gcc t.c -c
/tmp/ccdecizd.s: Assembler messages:
/tmp/ccdecizd.s:14: Error: symbol `abs' is already defined
In the case of "static" functions it's OK:
$ cat t.c
static int abs(int a) {return 0;}
static int __builtin_abs(int a) {return 0;}
int main(void)
{
return (abs(-3) + __builtin_abs(-3));
}
$ gcc t.c -c ; echo $?
0
In this case we use unchanged names for the functions' call:
$ gcc t.c -S && grep call t.s
call abs
call __builtin_abs
This issue doesn't occur only on abs but also with the others builtins.
$ ~/programs/gcc-4.4.0/bin/gcc -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ./configure --prefix=/home/glushkov/programs/gcc-4.4.0
--enable-languages=c,c++
Thread model: posix
gcc version 4.4.0 (GCC)
$ uname -a
Linux expert 2.6.23-gentoo-r9-c2-uni1 #1 SMP Thu Jun 5 13:00:21 MSD 2008 i686
Intel(R) Pentium(R) 4 CPU 3.40GHz GenuineIntel GNU/Linux
--
Summary: definitions of __builtin_abs() and abs() function in one
module
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: ivan dot glushkov at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40485
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/40485] definitions of __builtin_abs() and abs() function in one module not diagnosed
2009-06-18 9:20 [Bug c/40485] New: definitions of __builtin_abs() and abs() function in one module ivan dot glushkov at gmail dot com
@ 2009-06-18 9:36 ` rguenth at gcc dot gnu dot org
2009-06-18 9:48 ` ivan dot glushkov at gmail dot com
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-06-18 9:36 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from rguenth at gcc dot gnu dot org 2009-06-18 09:35 -------
This is really invalid code, but we should diagnose it.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Keywords| |accepts-invalid
Last reconfirmed|0000-00-00 00:00:00 |2009-06-18 09:35:53
date| |
Summary|definitions of |definitions of
|__builtin_abs() and abs() |__builtin_abs() and abs()
|function in one module |function in one module not
| |diagnosed
Version|unknown |4.4.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40485
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/40485] definitions of __builtin_abs() and abs() function in one module not diagnosed
2009-06-18 9:20 [Bug c/40485] New: definitions of __builtin_abs() and abs() function in one module ivan dot glushkov at gmail dot com
2009-06-18 9:36 ` [Bug c/40485] definitions of __builtin_abs() and abs() function in one module not diagnosed rguenth at gcc dot gnu dot org
@ 2009-06-18 9:48 ` ivan dot glushkov at gmail dot com
2009-06-18 13:48 ` rguenth at gcc dot gnu dot org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: ivan dot glushkov at gmail dot com @ 2009-06-18 9:48 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from ivan dot glushkov at gmail dot com 2009-06-18 09:48 -------
Why invalid? And why non-static is not invalid?
Can you please give me reference to documentation where it's described?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40485
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/40485] definitions of __builtin_abs() and abs() function in one module not diagnosed
2009-06-18 9:20 [Bug c/40485] New: definitions of __builtin_abs() and abs() function in one module ivan dot glushkov at gmail dot com
2009-06-18 9:36 ` [Bug c/40485] definitions of __builtin_abs() and abs() function in one module not diagnosed rguenth at gcc dot gnu dot org
2009-06-18 9:48 ` ivan dot glushkov at gmail dot com
@ 2009-06-18 13:48 ` rguenth at gcc dot gnu dot org
2009-06-18 14:51 ` pinskia at gcc dot gnu dot org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-06-18 13:48 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from rguenth at gcc dot gnu dot org 2009-06-18 13:48 -------
The __builtin_ namespace is reserved by GCC. There may be documentation
missing for this fact.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40485
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/40485] definitions of __builtin_abs() and abs() function in one module not diagnosed
2009-06-18 9:20 [Bug c/40485] New: definitions of __builtin_abs() and abs() function in one module ivan dot glushkov at gmail dot com
` (2 preceding siblings ...)
2009-06-18 13:48 ` rguenth at gcc dot gnu dot org
@ 2009-06-18 14:51 ` pinskia at gcc dot gnu dot org
2009-06-18 21:09 ` joseph at codesourcery dot com
2009-06-21 22:46 ` pinskia at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2009-06-18 14:51 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from pinskia at gcc dot gnu dot org 2009-06-18 14:51 -------
All of __* namespace s reserved for the implementor.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40485
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/40485] definitions of __builtin_abs() and abs() function in one module not diagnosed
2009-06-18 9:20 [Bug c/40485] New: definitions of __builtin_abs() and abs() function in one module ivan dot glushkov at gmail dot com
` (3 preceding siblings ...)
2009-06-18 14:51 ` pinskia at gcc dot gnu dot org
@ 2009-06-18 21:09 ` joseph at codesourcery dot com
2009-06-21 22:46 ` pinskia at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: joseph at codesourcery dot com @ 2009-06-18 21:09 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from joseph at codesourcery dot com 2009-06-18 21:08 -------
Subject: Re: definitions of __builtin_abs() and abs() function
in one module not diagnosed
What happened to the patch for PR 32455 to disallow __builtin_*
declarations? That PR indicates it was approved for 4.5.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40485
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/40485] definitions of __builtin_abs() and abs() function in one module not diagnosed
2009-06-18 9:20 [Bug c/40485] New: definitions of __builtin_abs() and abs() function in one module ivan dot glushkov at gmail dot com
` (4 preceding siblings ...)
2009-06-18 21:09 ` joseph at codesourcery dot com
@ 2009-06-21 22:46 ` pinskia at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2009-06-21 22:46 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from pinskia at gcc dot gnu dot org 2009-06-21 22:45 -------
*** This bug has been marked as a duplicate of 32455 ***
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |DUPLICATE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40485
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2009-06-21 22:46 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2009-06-18 9:20 [Bug c/40485] New: definitions of __builtin_abs() and abs() function in one module ivan dot glushkov at gmail dot com
2009-06-18 9:36 ` [Bug c/40485] definitions of __builtin_abs() and abs() function in one module not diagnosed rguenth at gcc dot gnu dot org
2009-06-18 9:48 ` ivan dot glushkov at gmail dot com
2009-06-18 13:48 ` rguenth at gcc dot gnu dot org
2009-06-18 14:51 ` pinskia at gcc dot gnu dot org
2009-06-18 21:09 ` joseph at codesourcery dot com
2009-06-21 22:46 ` pinskia at gcc dot gnu dot org
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