Unfortunately, libtool has no way of telling if unrecognized

Unfortunately, libtool has no way of telling if unrecognized
compiler flags need an argument or not, and can disect options and
pass parts through incorrectly.  This changeset reverts both
2004-09-06 Albert Chin-A-Young (topmost) and 2004-09-05 Albert
Chin-A-Young below, and recognises more options explicitly:

* config/ltmain.in (func_mode_link): Pass through options needed
to compile in 64-bit mode with gcc, and the SGI, Sun, HP and IBM
compilers.