Configure suggestion

[Igor Schein <igor@txc.com>]

Hi,

when I try to build 64bit binary on Solaris, it finds 32bit readline
library and subsequently fails to build.  I think of 3 possible
solutions, not mutually exclusive:

1) have Configure actually link conftest.c against libreadline to
make sure it's working
2) add gnu-like --with-readline and --without-readline flags
3) go 1 step further and be able to specify
--with-readline=/alternative/path. 

Thanks

Igor