for a specific glibc version, how could I get the functions declared in head file are implementation in which library?

Michael Kerrisk michael.kerrisk@googlemail.com
Tue Apr 15 09:58:00 GMT 2008


Mike Frysinger wrote:
> On Sunday 13 April 2008, Maciej W. Rozycki wrote:
>> On Sun, 13 Apr 2008, Mike Frysinger wrote:
>>>>   I meant, If I want to use a function in glibc, I need to link with
>>>> the corresponding shared library, how could I know, which library I
>>>> should link with?
>>> there is only one library, the C library, and gcc automatically does
>>> "-lc" for you.
>>  Well, sinf() for example needs -lm while clock_settime() -- -lrt.  I
>> suppose the right place for such information are the glibc info pages, but
>> there is never enough force available onboard to put all the bits there.
>> There might be a book available on the market as well, but I have never
>> bothered checking that.  Failing those, `objdump' on the libraries in
>> question will reveal which symbols they provide.
> 
> the respective man pages from the linux-man-pages project already documents 
> things nicely.

Indeed -- you beat me to the punch pointing that out Mike.

Maciej, if you find that a particular page in man-pages 
(http://www.kernel.org/doc/man-pages/online_pages.html) fails to provide 
that info, let me know.

Cheers,

Michael



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