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[Bug math/14343] Function logb() in math.h produces incorrect results for small inputs


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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