Default value for libiconv in target-supports.exp?

[Mark Mitchell]

In the past, if libiconv wasn't set in site.exp, 
target_supports.exp:check_iconv_available would crash.  So, I changed it 
to default to "-liconv".

On GNU/Linux, that's not a very good default, since iconv is in libc. 
The same seems to hold on Solaris and HP-UX.

Does anyone have opinions about what the default should be?

-- 
Mark Mitchell
CodeSourcery, LLC
mark@codesourcery.com
(916) 791-8304