Trig functions from math.h

Kevin Kofler kevin.kofler at
Fri Nov 28 02:37:48 UTC 2014

Les Howell wrote:
> I have some older code that used to compile, which I wish to reuse and
> maybe redesign.  However the code is C and uses the sinf function, which
> seems to have disappeared from math.h.  Can anyone tell me where this
> has gone?  The man pages no longer return the sinf function, Info pages
> say that it should be in either math.h or complex.h, but it is not.  The
> either math.h needs some modification (dated Sep 26 this year), and the
> man pages need updating, or the new function needs to be named,
> supported and the information on the Info pages needs to be updated.
> But in the interim, what is a work around?  Please don't tell me I have
> to code a trig function.

#define _DEFAULT_SOURCE or pass -D_DEFAULT_SOURCE to gcc.

        Kevin Kofler

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