[libstdc++] Add --disable-hosted-libstdcxx, clean up conditionals

[Bill Wendling]

Also sprach Gabriel Dos Reis:
} Bill Wendling <wendling@ncsa.uiuc.edu> writes:
} 
} | Also sprach Gabriel Dos Reis:
} | } 
} | } "-" is translated to "_".  "+" could just be translated to  "x".  And
} | } we would get a valid shell variable name.
} | } 
} | Phil answered your previous question about my "side-tracking" things.
} | For this, I suggest you write a patch for the autoconf people so that it
} | does what you suggest.
} 
} so, it is no longer "ridiculous"?
} 
What is no longer ridiculous? If you're referring to your suggestion that
we change the configure flag name, I never called that ridiculous. I said
we couldn't do it. If you're referring to renaming programs and
parameters passed as flags, then it has nothing to do with this email.

-- 
|| Bill Wendling            "Real Programmers have a Snoopy Calendar
|| wendling@ncsa.uiuc.edu    of '69 hanging on their wall"
|| Coding Simian                       -- Toon Moene