[RFC]: make IcedTea-web to be compatible with RHEL5 libraries

[Omair Majid]

On 08/23/2011 07:33 AM, Jiri Vanek wrote:
> The docmentation says "since 2.16" but it can not be true, as rhel5 have
> 2.5 and have missing those functions, and rhel 6 have 2.12.5 and my F13
> have 2.12 and both HAVE those functions .... :-/ But it is not firs time
> glibc documentation was wrong.
>
> I still think compilation is much more bulet-proof, but if you are ok
> with this then I will post updated patch.
>

If version-detection is not reliable, and compilation is more 
bullet-proof, then why not make use of AC_TRY_LINK/AC_TRY_LINK_FUNC [1]? 
It checks for functions (rather than versions) explicitly, uses 
compilation and is portable.

Cheers,
Omair

[1] 
http://www.linuxselfhelp.com/gnu/autoconf/html_chapter/autoconf_6.html#SEC69