Modify runConfigure to accept the names of C++ compilers that it doesn't recongnize, with an appropriate warning to the user.
Modify runConfigure to accept the names of C++ compilers that it doesn't
recongnize, with an appropriate warning to the user.

There is no reason we should accept only canonical forms of names. Accepting
a broader variety lets the user specify special compiler versions that may be
named differently, such as 'gcc-3.3'.


git-svn-id: 3ec853389310512053d525963cab269c063bb453@176404 13f79535-47bb-0310-9956-ffa450edef68

AaronNGray/xerces,AaronNGray/xerces,AaronNGray/xerces,AaronNGray/xerces