printf more equal than sin?

[Carlos O'Donell]

On Thu, Oct 23, 2008 at 12:30 PM, Holger Blasum
<holger-r-glibc@blasum.net> wrote:
> Hello Carlos,
>
>> To use printf you have to link in the C library e.g. -lc, but as a
>> convenience the compiler driver (gcc) does it for you.
>
> Thanks, I realize that, as "gcc -v" shows, internally I get "-lc"
> for free under gcc but where is it documented which functions of the
> standard C library actually are packaged in glibc and which
> functions of the standard C library are not? (That's why I am asking
> here, I do not consider this question related to gcc, correct me
> if that is wrong.)
> (For example, if I refer to the current online version of the
> GNU C Library Manual, "sin" needing "-lm" resides in chapter 19 of
> http://www.gnu.org/software/libtool/manual/libc/index.html
> and "printf" needing "-lc" resides in chapter 12. They do not look
> different to me. - It's not really an "issue" but just something
> I had been unable to give a good explanation for - or is it only
> math.h that needs special treatment in glibc by historical
> accident?)

I don't understand what you are asking. Could you please clarify your question?

Cheers,
Carlos.