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[Bug math/14343] Function logb() in math.h produces incorrect results for small inputs
- From: "carlos_odonell at mentor dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: Tue, 24 Jul 2012 02:30:18 +0000
- Subject: [Bug math/14343] Function logb() in math.h produces incorrect results for small inputs
- Auto-submitted: auto-generated
- References: <bug-14343-131@http.sourceware.org/bugzilla/>
http://sourceware.org/bugzilla/show_bug.cgi?id=14343
Carlos O'Donell <carlos_odonell at mentor dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
Last reconfirmed| |2012-07-23
CC| |carlos_odonell at mentor
| |dot com
--- Comment #2 from Carlos O'Donell <carlos_odonell at mentor dot com> 2012-07-24 02:30:18 UTC ---
Do you need a fix for this on the 2.15 stable branch?
Is it enough that 2.16 has the fix?
If you are compiling glibc yourself you can upgrade to 2.16.
If you use your distro provided glibc then you'll eventually ugprade to 2.16
and get the fix.
Confirmed that 2.15 has this bug.
carlos@domU-12-31-39-06-F5-7B:~$ ./test1
-1.000000
4294967295.000000
Confirmed that 2.16 does not have this bug.
carlos@domU-12-31-39-06-F5-7B:~/build/glibc-2.16$ ./elf/ld.so --library-path
/home/carlos/build/glibc-2.16/:/home/carlos/build/glibc-2.16/math
/home/carlos/test1
-1.000000
-1.000000
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