Ian Lance Taylor <i...@google.com> writes: > I would like to propose this patch as a step toward building gcc using a > C++ compiler. This patch builds stage1 with the C compiler as usual, > and defaults to building stages 2 and 3 with a C++ compiler built during > stage 1. This means that the gcc installed and used by most people will > be built by a C++ compiler. This will ensure that gcc is fully > buildable with C++, while retaining the ability to bootstrap with only a > C compiler, not a C++ compiler. This will permit us to experiment with > optionally using C++ for some code, using a #ifdef to select the C > implementation or the C++ implementation. > > I would suggest that we consider releasing 4.7 this way, as a small > trial for building gcc with C++. > > This is a big step, so I am sending the patch to both gcc@ and > gcc-patches@ for comments. > > Bootstrapped and ran testsuite on x86_64-unknown-linux-gnu. > > Ian > > > 2011-07-15 Ian Lance Taylor <i...@google.com> > > * configure.ac: Add --enable-build-poststage1-with-cxx. If set, > make C++ a boot_language. Set and substitute > POSTSTAGE1_CONFIGURE_FLAGS. > * Makefile.tpl (POSTSTAGE1_CONFIGURE_FLAGS): New variable. > (STAGE[+id+]_CONFIGURE_FLAGS): Add $(POSTSTAGE1_CONFIGURE_FLAGS). > * configure, Makefile.in: Rebuild.
I got agreement from two global reviewers and no objections. I have committed this patch. Please let me know about any problems. Ian
