PATCH RFA: Build stages 2 and 3 with C++

[Ian Lance Taylor]

"H.J. Lu" <hjl.tools@gmail.com> writes:

> It caused:
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49787

Here is a patch.  Tested only by running configure, though I am starting
a bootstrap.

OK for mainline?

Ian


2011-07-19  Ian Lance Taylor  <iant@google.com>

	PR bootstrap/49787
	* configure.ac: Move --enable-bootstrap handling earlier in file.
	If --enable-bootstrap and either --enable-build-with-cxx or
	--enable-build-poststage1-with-cxx, enable C++ automatically.
	* configure: Rebuild.


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