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Re: PATCH RFA: Build stages 2 and 3 with C++
On Tue, Jul 19, 2011 at 11:33 AM, Ian Lance Taylor <iant@google.com> wrote:
> Ian Lance Taylor <iant@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 ?<iant@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
--
H.J.