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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
end of thread, other threads:[~2006-05-04 1:52 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 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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