Thomas Koenig <tkoe...@netcologne.de> writes: > I just noticed that C++ now appears to be built by default, even when > only the C and fortran are specified. The configure line > > > ../trunk/configure --prefix=$HOME --enable-languages=c,fortran > --with-mpc=/usr/local --with-mpfr=/usr/local > > leads to the message > > checking for version 0.11 (revision 0 or later) of PPL... no > > The following languages will be built: c,c++,fortran,lto > > I see recent changes by Ian in this area, but nothing in the ChangeLog > suggests to me that this was intentional.
It is intentional. In current mainline stages 2 and 3 are now by default built with the C++ compiler, not the C compiler. Therefore, the C++ compiler must be built in stages 1 and 2, in order to use to build the stages 2 and 3 compiler. And then of course we build the C++ compiler in stage 3 in order to compare it. The ChangeLog entry says that if --enable-build-poststage1-with-cxx is set, C++ becomes a boot language. That is what you are seeing. I guess what the ChangeLog entry does not say is that --enable-build-poststage1-with-cxx is set by default. Ian
