Building GCC using C++

[Uday P. Khedker]

I was trying to understand the exact meaning of a loose statement
floating around ("gcc has moved to C++ from version 4.7 onwards).

I reckon from http://gcc.gnu.org/wiki/gcc-in-cxx that now gcc is
compiled using C++. However, the very first line of the description
confused me. It says:

> GCC has been building stages 2 and 3 in C++ mode for a while.

My understanding was that stage 2 is built using the compiler created
in stage 1 and stage 3 is built using the compiler created in stage 2.
(Please see slide 17/53 in http://www.cse.iitb.ac.in/grc/gcc-workshop-12/downloads/slides/gccw12-config-build.pdf).

Can someone tell me what is the meaning of building stage 2 in C++
mode? If I restrict my languages (using --enable-languages) to C,
how can stage 2 be built in C++ mode? Or is it that regardless of
the choice given using --enable-languages option, internally C and
C++ compiler are created anyway? The build logs do not seem to bear
out the above statement.

Thanks and regards,

Uday.
-- 
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Dr. Uday Khedker
Professor
Department of Computer Science & Engg.
IIT Bombay, Powai, Mumbai 400 076, India.
Email   : 	uday@cse.iitb.ac.in
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