llrint implementation in Cygwin
Diego Biurrun
diego@biurrun.de
Sat Sep 29 19:15:00 GMT 2007
Igor Peshansky wrote:
> On Fri, 28 Sep 2007, Diego Biurrun wrote:
>
>>Tim Prince wrote:
>>
>>>Diego Biurrun wrote:
>>>
>>>>I have noticed that Cygwin does not implement llrint. However,
>>>>llrint is part of C99 and not having it available makes some
>>>>applications (for example MPlayer and FFmpeg) fail to compile.
>>>>
>>>>Are there any plans to implement llrint (in the near future)?
>>>
>>>Perhaps if you would submit a patch to newlib, something may happen.
>>
>>Telling me what newlib is would greatly help in this regard :-)
>
> Newlib is the library that Cygwin uses for some standard functions (math
> and otherwise).
>
> (The only way to interpret this question is "what is the connection
> between newlib and Cygwin", as a quick Google would have pointed you to
> the newlib webpage).
Yes, I was not precise. I was unsure about the relationship between
Cygwin and newlib.
>>I understand that adding llrint to Cygwin is probably not hard at all
>>for somebody familiar with Cygwin. However, I am not such a person and
>>I don't even have a Windows environment around to test any modifications
>>I might make.
>>
>>We are about to make an MPlayer release and unfortunately it will not
>>compile on Cygwin due to the missing llrint. I would appreciate to know
>>if this is going to get addressed so that I can put an appropriate
>>comment in the release notes.
>
> What's wrong with adding llrint to your code (perhaps with a #define,
> i.e.,
>
> #define llrint my_llrint
> typeof(llrint) my_llrint(...) { ... }
>
> )?
It is ugly and it is a workaround for a problem that should be solved
outside of FFmpeg. Should every project using llrint add that
workaround? No, Cygwin should be fixed.
Diego
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