On Tue, Jul 19, 2011 at 5:26 PM, H.J. Lu <hjl.to...@gmail.com> wrote: > On Tue, Jul 19, 2011 at 11:33 AM, Ian Lance Taylor <i...@google.com> wrote: >> 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. > > It caused: > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49787
It also caused: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49786 -- H.J.
