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* [Bug c/27413] New: compiling with -ansi puts in broken version of atanh
@ 2006-05-04 1:23 anonymous at mailinator dot com
2006-05-04 1:26 ` [Bug c/27413] " anonymous at mailinator dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: anonymous at mailinator dot com @ 2006-05-04 1:23 UTC (permalink / raw)
To: gcc-bugs
If you use -ansi to compile a program that uses the atanh function, the
compiler somehow replaces atanh with a function that just returns 0. I think
the compiler should either put in the correct atanh function or refuses to
link/compile. The following shows how to reproduce the bug:
$ cat > bug.c
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
int main() { printf("atanh(%f) returns %f!\n",.32,atanh(.32)); return 0;}
$ gcc bug.c -o bug.exe -lm && bug.exe
atanh(0.320000) returns 0.331647!
$ gcc -ansi bug.c -o bug.exe -lm && bug.exe
atanh(0.320000) returns 0.000000!
--
Summary: compiling with -ansi puts in broken version of atanh
Product: gcc
Version: 3.3.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: anonymous at mailinator dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27413
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c/27413] compiling with -ansi puts in broken version of atanh
2006-05-04 1:23 [Bug c/27413] New: compiling with -ansi puts in broken version of atanh anonymous at mailinator dot com
@ 2006-05-04 1:26 ` anonymous at mailinator dot com
2006-05-04 1:27 ` anonymous at mailinator dot com
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: anonymous at mailinator dot com @ 2006-05-04 1:26 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from anonymous at mailinator dot com 2006-05-04 01:25 -------
Created an attachment (id=11370)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11370&action=view)
.i file created with -save-temps flag
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27413
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c/27413] compiling with -ansi puts in broken version of atanh
2006-05-04 1:23 [Bug c/27413] New: compiling with -ansi puts in broken version of atanh anonymous at mailinator dot com
2006-05-04 1:26 ` [Bug c/27413] " anonymous at mailinator dot com
@ 2006-05-04 1:27 ` anonymous at mailinator dot com
2006-05-04 1:28 ` anonymous at mailinator dot com
2006-05-04 1:52 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: anonymous at mailinator dot com @ 2006-05-04 1:27 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from anonymous at mailinator dot com 2006-05-04 01:27 -------
Created an attachment (id=11371)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11371&action=view)
.s file created with -save-temps
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27413
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c/27413] compiling with -ansi puts in broken version of atanh
2006-05-04 1:23 [Bug c/27413] New: compiling with -ansi puts in broken version of atanh anonymous at mailinator dot com
2006-05-04 1:26 ` [Bug c/27413] " anonymous at mailinator dot com
2006-05-04 1:27 ` anonymous at mailinator dot com
@ 2006-05-04 1:28 ` anonymous at mailinator dot com
2006-05-04 1:52 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: anonymous at mailinator dot com @ 2006-05-04 1:28 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from anonymous at mailinator dot com 2006-05-04 01:28 -------
Created an attachment (id=11372)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11372&action=view)
output of compiler with --save-temps
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27413
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c/27413] compiling with -ansi puts in broken version of atanh
2006-05-04 1:23 [Bug c/27413] New: compiling with -ansi puts in broken version of atanh anonymous at mailinator dot com
` (2 preceding siblings ...)
2006-05-04 1:28 ` anonymous at mailinator dot com
@ 2006-05-04 1:52 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-05-04 1:52 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from pinskia at gcc dot gnu dot org 2006-05-04 01:52 -------
t1.c: In function 'main':
t1.c:5: warning: implicit declaration of function 'atanh'
t1.c:5: warning: format '%f' expects type 'double', but argument 3 has type
'int'
You need either -std=c99 or not use -ansi as atanh is a C99 math function and
not part of C90. Also this is more of a glibc issue than a GCC one.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27413
^ permalink raw reply [flat|nested] 5+ messages in thread
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2006-05-04 1:23 [Bug c/27413] New: compiling with -ansi puts in broken version of atanh anonymous at mailinator dot com
2006-05-04 1:26 ` [Bug c/27413] " anonymous at mailinator dot com
2006-05-04 1:27 ` anonymous at mailinator dot com
2006-05-04 1:28 ` anonymous at mailinator dot com
2006-05-04 1:52 ` pinskia at gcc dot gnu dot org
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