GCC 3.0 branch Java iconv linking problems

[David Edelsohn]

	With the recent change to iconv configuration, jc1 no longer links
on AIX because of errors with iconv symbols.

	AIX does have iconv and configure finds it:

config.cache:

am_cv_func_iconv=${am_cv_func_iconv=yes}
am_cv_lib_iconv=${am_cv_lib_iconv=yes}


config.status:

s%@LIBICONV@%-liconv%g


But LIBICONV never is defined in gcc/Makefile generated by configure.
ZLIB is defined earlier in the Makefile because Makefile.in includes

ZLIB = @zlibdir@ -lz
ZLIBINC = @zlibinc@

None of the Makefiles include anything similar for @LIBICONV@.  Where was
this suppose to be defined?

Thanks, David