incorrect print -1 using %hhd
rep.dot.nop at gmail.com
Wed Mar 28 07:52:38 UTC 2012
On 28 March 2012 08:38, Andrew Rybchenko <Andrew.Rybchenko at oktetlabs.ru> wrote:
> On 03/28/2012 02:36 AM, Michael Deutschmann wrote:
>> On Tue, 27 Mar 2012, Mike Frysinger wrote:
>>> On Tuesday 27 March 2012 10:28:29 Andrew Rybchenko wrote:
>>>> Is it known issue that uClibc 0.9.32 incorrectly prints -1 using
>>>> %hhd (and %hhi) specifier? The following program:
>>> please file a bug
>> No need, this is bug #1783.
>> It was closed as fixed-in-the-next-release when I reported it against
>> 0.9.31, but somehow the fix hasn't percolated into any release version of
>> uClibc yet.
>> The fix is really simple. Just change the cast from "(char)" to "(signed
>> char)" in libc/stdio/_load_inttype.c . The bug was introduced not by any
>> change in the sourcecode itself, but because the Makefiles started
>> specifying -funsigned-char everywhere.
And that's exactly why using -funsigned-char is a really bad idea.
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