I apologize; I didn't realize that. In that case, you're right; the current approach is just busted. It should become an --enable option, or a hard-coded case statement, or an autoconf test that doesn't require linking stuff.
Really? Like --enable-symvers[=style]? http://gcc.gnu.org/onlinedocs/libstdc++/configopts.html Of course, the issue of the "C" library remains. -benjamin