[libstdc++] Build system cleanup [3/n]

[Kelley Cook]

Even though it was obvious that they were intended to be already 
autodefined via linkage.m4, there were manual defines for all the 
HAVE___BUILTIN_* macros.

This was because of a poor coding technique in linkage.m4 by shelling 
out to tr instead of using the builtin translit macro.  As a bonus is 
that this speeds up configure as it eliminates a subshell invocation for 
each of those HAVE__BUILTIN_* checks.

Bootstrapped i686-pc-cygwin with no changes.

OK to install?
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: ac3.diff
URL: <http://gcc.gnu.org/pipermail/libstdc++/attachments/20050404/1ae1af29/attachment.ksh>