Python 2.5a1 and Python 2.4.3 both build incorrectly on
Solaris 8 when compiled in 64-bit mode, using Sun
Studio 11 cc.  Here is the diagnostic:

cc -O -xarch=v9 -G
build/temp.solaris-2.8-sun4u-2.5/cryptmodule.o
-L/u/cs/fac/eggert/seasnet/prefix/lib -lcrypt -o
build/lib.solaris-2.8-sun4u-2.5/crypt.so
ld: fatal: library -lcrypt: not found
ld: fatal: File processing errors. No output written to
build/lib.solaris-2.8-sun4u-2.5/crypt.so

The problem is that setup.py looks at 32-bit libraries
when trying to decide whether a 64-bit build will work.
 Using LIBS=' -lcrypt_i' does not work around the
problem, since the LIBS setting is not exported to the
module build.  I'll attach a proposed patch to the
README file to warn about the problem.