Re: How do I add missing stdc functions to libstdc++-v3?

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On Tue, Mar 6, 2012 at 10:50 PM, Vaugha Brewchuk
<vaugha_brewchuk@xxxxxxxx> wrote:
>
> On 2012-03-06, at 4:51 PM, Jonathan Wakely wrote:
>
>> On 6 March 2012 20:53, Vaugha Brewchuk wrote:
>>>
>>>
>>> [SNIP]
>>>
>>>  On the other hand access() and write() are in the NeXT libraries, but are defined in header libc.h, that libstdc++ does not recognize out of the box...
>>
>> I doubt those functions are defined in a header, note the error you're
>> getting is an undefined reference - meaning the library containing the
>> functions hasn't been found.  Not finding a header isn't the problem.
>> Which library defines them?
>
> It looks like the actual objects for access() and write() reside in /usr/shlib/libsys_s.B.shlib, which is a shared library that is automatically loaded, if needed, by the standard NeXT static library /lib/libsys_s.a.  To confirm I just created a short test program in C that uses write() and compiled it with my C only port of gcc-3.2.3 using the following command:
>
Be careful with access(2) - I believe its a TOCTOU lying in wait. My
man pages tell me "access() is a potential security hole and should
never be used."



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