[FFmpeg-cvslog] r14484 - in trunk/libavcodec: audioconvert.c audioconvert.h

[Diego Biurrun]

On Sat, Aug 02, 2008 at 06:32:36PM +0200, Michael Niedermayer wrote:
> On Sat, Aug 02, 2008 at 06:15:20PM +0200, Diego Biurrun wrote:
> > On Sat, Aug 02, 2008 at 05:54:56PM +0200, Michael Niedermayer wrote:
> > > On Sat, Aug 02, 2008 at 06:40:13PM +0300, Uoti Urpala wrote:
> > > > On Sat, 2008-08-02 at 17:23 +0200, Michael Niedermayer wrote:
> > > > > On Sat, Aug 02, 2008 at 02:50:40PM +0200, Diego Biurrun wrote:
> > > > > > On Sat, Aug 02, 2008 at 04:25:52AM +0200, Michael Niedermayer wrote:
> > > > > > > it also uses lrintf & snprintf thus also needs one way or another
> > > > > > > stdio.h and math.h with  _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE defined before
> > > > > > > inclusion of math.h
> > > > 
> > > > Those are standard C, so any special defines are only required if the
> > > > default is to use old versions.
> > > 
> > > no
> > > -------
> > > Linux Programmer?s Manual                                                             LRINT(3)
> > > 
> > > NAME
> > >        lrint, lrintf, lrintl, llrint, llrintf, llrintl - round to nearest integer
> > > 
> > > SYNOPSIS
> > > [...]
> > >        Link with -lm.
> > > 
> > >    Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
> > > 
> > >        All functions shown above: _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or cc -std=c99
> > >        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> > > -------
> > > > > > These definitions are part of the global CFLAGS, no need to duplicate
> > > > > > them.
> > > > > 
> > > > > until it causes you an hour of work when you try to compile it
> > > > > in mplayer that happenes not to set them.
> > > > 
> > > > MPlayer uses -std=gnu99 with GCC, so no extra defines are needed for
> > > > standard C functions. So even if such defines are not set any problems
> > > > could only occur if you're using some compiler which MPlayer does not
> > > > recognize and which does not support C99 functions by default.
> > > 
> > > see above, the manual page of lrintf explain it rather clearly, what is
> > > needed on linux. I do not know if you propose to drop linux support or
> > > if you propose to depend on undocumented options.
> > 
> > -std=gnu99 is a superset of -std=c99, so no problem.
> 
> The manual disagrees with you, it lists _XOPEN_SOURCE, _ISOC99_SOURCE and 
> -std=c99 it does not list gnu99

You are reading the wrong manual.  The gcc manual clearly states that
gnu99 is a superset of c99.

Diego